{"id":5170,"date":"2025-07-20T01:14:55","date_gmt":"2025-07-19T16:14:55","guid":{"rendered":"https:\/\/sky-peace.net\/?p=5170"},"modified":"2025-07-20T01:14:55","modified_gmt":"2025-07-19T16:14:55","slug":"dns-dhcp","status":"publish","type":"post","link":"https:\/\/sky-peace.net\/certified\/dns-dhcp\/","title":{"rendered":"DNS\u3068DHCP\u306e\u5168\u3066\uff1a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u300c\u3064\u306a\u3050\u300d\u4ed5\u7d44\u307f\u304b\u3089\u5fdc\u7528\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u305d\u3057\u3066\u8a66\u9a13\u5bfe\u7b56\u307e\u3067"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\uff01\u4eca\u56de\u3042\u306a\u305f\u306fDNS\u3068DHCP\u3068\u3044\u3046\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u7e01\u306e\u4e0b\u306e\u529b\u6301\u3061\u3068\u3082\u8a00\u3048\u308b\u91cd\u8981\u306a\u6280\u8853\u306b\u3064\u3044\u3066\u6df1\u304f\u5b66\u3093\u3067\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u306e\u7a76\u6975\u306e\u30b4\u30fc\u30eb\u306f\u3001\u5358\u306b\u8a66\u9a13\u306b\u5408\u683c\u3059\u308b\u305f\u3081\u306e\u77e5\u8b58\u3092\u8a70\u3081\u8fbc\u3080\u3053\u3068\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3082\u3061\u308d\u3093\u3001\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5408\u683c\u306f\u76ee\u6307\u3057\u307e\u3059\u304c\u3001\u305d\u308c\u4ee5\u4e0a\u306b\u3001\u3042\u306a\u305f\u304cIT\u6280\u8853\u306e\u300c\u306a\u305c\uff1f\u300d\u3092\u8ffd\u6c42\u3057\u3001\u81ea\u5f8b\u7684\u306b\u5b66\u7fd2\u3092\u9032\u3081\u305f\u304f\u306a\u308b\u3088\u3046\u306a\u300c\u77e5\u7684\u597d\u5947\u5fc3\u3092\u523a\u6fc0\u3059\u308b\u4f53\u9a13\u300d\u3092\u63d0\u4f9b\u3059\u308b\u3053\u3068\u3092\u76ee\u6307\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4>IT\u5b66\u7fd2\u306e\u300c\u6700\u9ad8\u306e\u30e1\u30f3\u30bf\u30fc\u300d\u3068\u3057\u3066\u3001\u5171\u306b\u5275\u308a\u4e0a\u3052\u308b\u8a18\u4e8b<\/h4>\n<p>\u79c1\u306f\u3001\u3042\u306a\u305f\u306e\u300c\u8d85\u4e00\u6d41\u306eIT\u6559\u80b2\u30b9\u30c8\u30e9\u30c6\u30b8\u30b9\u30c8\u300d\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e4\u3064\u306e\u5f79\u5272\u3092\u7d71\u5408\u3057\u305f\u5b58\u5728\u3068\u3057\u3066\u632f\u308b\u821e\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u5c02\u9580\u77e5\u8b58\u3092\u6301\u3064\u300c\u6559\u6388\u300d\uff1a<\/strong> 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Host Configuration Protocol\uff09<\/strong>\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u30c7\u30d0\u30a4\u30b9\u306b\u3001IP\u30a2\u30c9\u30ec\u30b9\u3084\u305d\u306e\u4ed6\u306e\u5fc5\u8981\u306a\u8a2d\u5b9a\u60c5\u5831\u3092\u300c\u81ea\u52d5\u3067\u5272\u308a\u5f53\u3066\u3066\u304f\u308c\u308b\u300d\u30b5\u30fc\u30d3\u30b9\u3067\u3059\u3002\u4f8b\u3048\u308b\u306a\u3089\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u306b\u5fc5\u8981\u306a\u60c5\u5831\u304c\u8a70\u307e\u3063\u305f\u300c\u81ea\u52d5\u8ca9\u58f2\u6a5f\u300d\u306e\u3088\u3046\u306a\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n<p>\u5bb6\u5ead\u3067Wi-Fi\u306b\u30b9\u30de\u30db\u3092\u3064\u306a\u3044\u3060\u308a\u3001\u8077\u5834\u3067\u30ce\u30fc\u30c8PC\u3092LAN\u30b1\u30fc\u30d6\u30eb\u3067\u3064\u306a\u3044\u3060\u308a\u3059\u308b\u3068\u304d\u3001\u7279\u5225\u306a\u8a2d\u5b9a\u3092\u3057\u306a\u304f\u3066\u3082\u3059\u3050\u306b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3067\u304d\u307e\u3059\u3088\u306d\uff1f \u3053\u308c\u306f\u3001DHCP\u30b5\u30fc\u30d0\u30fc\u304c\u81ea\u52d5\u7684\u306b\u300cIP\u30a2\u30c9\u30ec\u30b9\u300d\u300c\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u300d\u300c\u30c7\u30d5\u30a9\u30eb\u30c8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u300d\u300cDNS\u30b5\u30fc\u30d0\u30fc\u306e\u30a2\u30c9\u30ec\u30b9\u300d\u3068\u3044\u3063\u305f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u306b\u5fc5\u8981\u306a\u60c5\u5831\u3092\u5272\u308a\u5f53\u3066\u3066\u304f\u308c\u3066\u3044\u308b\u304b\u3089\u306a\u3093\u3067\u3059\u3002<\/p>\n<p>\u3082\u3057DHCP\u304c\u306a\u3051\u308c\u3070\u3001\u30c7\u30d0\u30a4\u30b9\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3073\u306b\u3001\u3053\u308c\u3089\u306e\u60c5\u5831\u3092\u624b\u52d5\u3067\u8a2d\u5b9a\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u305f\u304f\u3055\u3093\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u7ba1\u7406\u3059\u308b\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u3001\u3068\u3066\u3064\u3082\u306a\u304f\u624b\u9593\u304c\u304b\u304b\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3088\u306d\u3002DHCP\u306f\u3001\u3053\u306eIP\u30a2\u30c9\u30ec\u30b9\u7ba1\u7406\u306e\u624b\u9593\u3092\u5927\u5e45\u306b\u524a\u6e1b\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u904b\u7528\u3092\u52b9\u7387\u5316\u3057\u3066\u304f\u308c\u308b\u3001\u307e\u3055\u306b\u7e01\u306e\u4e0b\u306e\u529b\u6301\u3061\u306a\u3093\u3067\u3059\u3002<\/p>\n<p>DHCP\u306f\u3001\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3067\u306f\u4e3b\u306b\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u300d\u5206\u91ce\u3067\u554f\u308f\u308c\u307e\u3059\u3002\u7279\u306b\u3001IP\u30a2\u30c9\u30ec\u30b9\u306e\u81ea\u52d5\u5272\u308a\u5f53\u3066\u306e\u4ed5\u7d44\u307f\u3084\u3001\u95a2\u9023\u3059\u308b\u8a2d\u5b9a\u9805\u76ee\u306b\u3064\u3044\u3066\u7406\u89e3\u3092\u6df1\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>3. \u5927\u56f3\u89e3\uff1aDNS\u3068DHCP\u306e\u5168\u4f53\u50cf\u3068\u4ed5\u7d44\u307f<\/h3>\n<p>DNS\u3068DHCP\u304c\u305d\u308c\u305e\u308c\u3069\u3093\u306a\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u308b\u304b\u3001\u4e00\u8a00\u3067\u3054\u7406\u89e3\u3044\u305f\u3060\u3051\u305f\u3067\u3057\u3087\u3046\u304b\uff1f \u3053\u3053\u304b\u3089\u306f\u3001\u305d\u308c\u3089\u304c\u5b9f\u969b\u306b\u3069\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3057\u3066\u3044\u308b\u306e\u304b\u3092\u3001\u56f3\u3092\u30a4\u30e1\u30fc\u30b8\u3057\u306a\u304c\u3089\u5177\u4f53\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u8907\u96d1\u306b\u601d\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u4e00\u3064\u4e00\u3064\u306e\u30b9\u30c6\u30c3\u30d7\u3092\u8ffd\u3063\u3066\u3044\u3051\u3070\u3001\u304d\u3063\u3068\u300c\u306a\u308b\u307b\u3069\uff01\u300d\u3068\u611f\u3058\u3066\u3044\u305f\u3060\u3051\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<h4>3.1 DNS\u306e\u4ed5\u7d44\u307f\u3092\u56f3\u3067\u89e3\u8aac\uff1a\u540d\u524d\u89e3\u6c7a\u306e\u65c5<\/h4>\n<p>\u79c1\u305f\u3061\u304c\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6\u3067\u300cwww.example.com\u300d\u3068\u5165\u529b\u3057\u305f\u3068\u304d\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u306e\u88cf\u5074\u3067\u306f\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u304cIP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3055\u308c\u308b\u300c\u540d\u524d\u89e3\u6c7a\u300d\u3068\u3044\u3046\u51e6\u7406\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u307e\u308b\u3067\u4f4f\u6240\u3092\u63a2\u3059\u65c5\u306e\u3088\u3046\u3067\u3059\u3002<\/p>\n<ol>\n<li><strong>PC\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\uff08\u30ea\u30be\u30eb\u30d0\u3078\u306e\u4f9d\u983c\uff09\uff1a<\/strong> \u3042\u306a\u305f\u306ePC\u306f\u3001\u307e\u305a\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bDNS\u30b5\u30fc\u30d0\u30fc\uff08\u3053\u308c\u3092\u300c\u30ea\u30be\u30eb\u30d0\u300d\u3068\u547c\u3073\u307e\u3059\uff09\u306b\u300cwww.example.com \u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u6559\u3048\u3066\uff01\u300d\u3068\u554f\u3044\u5408\u308f\u305b\u307e\u3059\u3002<\/li>\n<li><strong>\u30ea\u30be\u30eb\u30d0\u306e\u65c5\u7acb\u3061\uff1a<\/strong> \u30ea\u30be\u30eb\u30d0\u306f\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u304c\u3069\u3053\u306b\u3042\u308b\u304b\u3092\u77e5\u308a\u307e\u305b\u3093\u3002\u305d\u3053\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u6700\u4e0a\u4f4d\u306b\u4f4d\u7f6e\u3059\u308b\u300c\u30eb\u30fc\u30c8DNS\u30b5\u30fc\u30d0\u30fc\u300d\u306b\u5c0b\u306d\u306b\u884c\u304d\u307e\u3059\u3002\u30eb\u30fc\u30c8DNS\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u4e16\u754c\u4e2d\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u306e\u968e\u5c64\u69cb\u9020\u306e\u9802\u70b9\u306b\u7acb\u3064\u5b58\u5728\u3067\u3059\u3002<\/li>\n<li><strong>\u30eb\u30fc\u30c8DNS\u304b\u3089\u306e\u30d2\u30f3\u30c8\uff1a<\/strong> \u30eb\u30fc\u30c8DNS\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u300c.com\u300d\u30c9\u30e1\u30a4\u30f3\u3092\u7ba1\u7406\u3057\u3066\u3044\u308b\u300cTLD\uff08Top Level Domain\uff09DNS\u30b5\u30fc\u30d0\u30fc\u300d\u306e\u5834\u6240\u3092\u30ea\u30be\u30eb\u30d0\u306b\u6559\u3048\u3066\u304f\u308c\u307e\u3059\u3002<\/li>\n<li><strong>TLD DNS\u304b\u3089\u306e\u9053\u6848\u5185\uff1a<\/strong> \u30ea\u30be\u30eb\u30d0\u306f\u6b21\u306b\u3001TLD DNS\u30b5\u30fc\u30d0\u30fc\u306b\u300cwww.example.com \u306f\u3069\u3053\uff1f\u300d\u3068\u5c0b\u306d\u307e\u3059\u3002TLD DNS\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u300cexample.com\u300d\u3068\u3044\u3046\u7279\u5b9a\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u7ba1\u7406\u3057\u3066\u3044\u308b\u300c\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\u300d\u306e\u5834\u6240\u3092\u6559\u3048\u3066\u304f\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u6a29\u5a01DNS\u306b\u3088\u308b\u6700\u7d42\u6848\u5185\uff1a<\/strong> \u6700\u5f8c\u306b\u3001\u30ea\u30be\u30eb\u30d0\u306f\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\u306b\u300cwww.example.com \u306eIP\u30a2\u30c9\u30ec\u30b9\u306f\uff1f\u300d\u3068\u76f4\u63a5\u554f\u3044\u5408\u308f\u305b\u307e\u3059\u3002\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u6b63\u78ba\u306aIP\u30a2\u30c9\u30ec\u30b9\u3092\u77e5\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u305d\u306e\u60c5\u5831\u3092\u30ea\u30be\u30eb\u30d0\u306b\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<li><strong>PC\u3078\u306eIP\u30a2\u30c9\u30ec\u30b9\u901a\u77e5\uff1a<\/strong> \u30ea\u30be\u30eb\u30d0\u306f\u3001\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u5f97\u305fIP\u30a2\u30c9\u30ec\u30b9\u3092\u3042\u306a\u305f\u306ePC\u306b\u4f1d\u3048\u307e\u3059\u3002\u540c\u6642\u306b\u3001\u3053\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u3057\u3070\u3089\u304f\u306e\u9593\u30ad\u30e3\u30c3\u30b7\u30e5\uff08\u4e00\u6642\u4fdd\u5b58\uff09\u3057\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u6b21\u306b\u540c\u3058\u30c9\u30e1\u30a4\u30f3\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u8fc5\u901f\u306b\u89e3\u6c7a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u3046\u3057\u3066\u3042\u306a\u305f\u306ePC\u306f\u76ee\u7684\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u77e5\u308a\u3001\u305d\u306eIP\u30a2\u30c9\u30ec\u30b9\u5b9b\u306b\u901a\u4fe1\u3092\u958b\u59cb\u3067\u304d\u308b\u306e\u3067\u3059\u3002\u3053\u306e\u4e00\u9023\u306e\u6d41\u308c\u304c\u3001\u308f\u305a\u304b\u6570\u30df\u30ea\u79d2\u306e\u9593\u306b\u81ea\u52d5\u7684\u306b\u884c\u308f\u308c\u3066\u3044\u308b\u3068\u8003\u3048\u308b\u3068\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u4ed5\u7d44\u307f\u3063\u3066\u672c\u5f53\u306b\u3059\u3054\u3044\u3067\u3059\u3088\u306d\uff01<\/p>\n<h4>3.2 DHCP\u306e\u4ed5\u7d44\u307f\u3092\u56f3\u3067\u89e3\u8aac\uff1aIP\u30a2\u30c9\u30ec\u30b9\u53d6\u5f97\u306eDORA\u30d7\u30ed\u30bb\u30b9<\/h4>\n<p>\u6b21\u306b\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u30c7\u30d0\u30a4\u30b9\u304cDHCP\u30b5\u30fc\u30d0\u30fc\u304b\u3089IP\u30a2\u30c9\u30ec\u30b9\u3092\u81ea\u52d5\u3067\u53d6\u5f97\u3059\u308b\u307e\u3067\u306e\u6d41\u308c\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u305d\u306e\u982d\u6587\u5b57\u3092\u3068\u3063\u3066\u300cDORA\u30d7\u30ed\u30bb\u30b9\u300d\u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>Discover\uff08\u767a\u898b\uff09\uff1a<\/strong> \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3057\u305f\u3070\u304b\u308a\u306ePC\uff08DHCP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\uff09\u306f\u3001\u81ea\u5206\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u5272\u308a\u5f53\u3066\u3066\u304f\u308c\u308bDHCP\u30b5\u30fc\u30d0\u30fc\u3092\u63a2\u3059\u305f\u3081\u3001\u300cDHCP Discover\u300d\u3068\u3044\u3046\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002\u300c\u8ab0\u304bDHCP\u30b5\u30fc\u30d0\u30fc\u3044\u307e\u305b\u3093\u304b\u30fc\uff1f\u300d\u3068\u53eb\u3093\u3067\u3044\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u306d\u3002<\/li>\n<li><strong>Offer\uff08\u63d0\u4f9b\uff09\uff1a<\/strong> \u300cDiscover\u300d\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u3051\u53d6\u3063\u305fDHCP\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5272\u308a\u5f53\u3066\u308bIP\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u60c5\u5831\uff08IP\u30a2\u30c9\u30ec\u30b9\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u3001DNS\u30b5\u30fc\u30d0\u30fc\u306e\u30a2\u30c9\u30ec\u30b9\u306a\u3069\uff09\u3092\u63d0\u793a\u3059\u308b\u300cDHCP Offer\u300d\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u300c\u79c1\u304cIP\u30a2\u30c9\u30ec\u30b9\u3092\u8cb8\u3057\u51fa\u305b\u307e\u3059\u3088\u3001\u3053\u306e\u30a2\u30c9\u30ec\u30b9\u306f\u3069\u3046\u3067\u3059\u304b\uff1f\u300d\u3068\u63d0\u6848\u3059\u308b\u308f\u3051\u3067\u3059\u3002<\/li>\n<li><strong>Request\uff08\u8981\u6c42\uff09\uff1a<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u3001DHCP\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u53d7\u3051\u53d6\u3063\u305f\u300cOffer\u300d\u306e\u5185\u5bb9\u3067\u554f\u984c\u306a\u3051\u308c\u3070\u3001\u300cDHCP Request\u300d\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u3066\u3001\u305d\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3057\u305f\u3044\u3068DHCP\u30b5\u30fc\u30d0\u30fc\u306b\u6b63\u5f0f\u306b\u8981\u6c42\u3057\u307e\u3059\u3002\u8907\u6570\u306eDHCP\u30b5\u30fc\u30d0\u30fc\u304b\u3089Offer\u304c\u3042\u3063\u305f\u5834\u5408\u306f\u3001\u6700\u521d\u306b\u5fdc\u7b54\u304c\u3042\u3063\u305f\u30b5\u30fc\u30d0\u30fc\u3092\u9078\u629e\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/li>\n<li><strong>ACK\uff08\u627f\u8a8d\uff09\uff1a<\/strong> \u300cRequest\u300d\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u3051\u53d6\u3063\u305fDHCP\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306bIP\u30a2\u30c9\u30ec\u30b9\u306e\u30ea\u30fc\u30b9\uff08\u8cb8\u4e0e\uff09\u3092\u78ba\u5b9a\u3057\u305f\u3053\u3068\u3092\u4f1d\u3048\u308b\u300cDHCP ACK\uff08Acknowledgment\uff09\u300d\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u300cOK\u3067\u3059\uff01\u305d\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u3063\u3066\u304f\u3060\u3055\u3044\u306d\u3002\u300d\u3068\u3044\u3046\u6700\u7d42\u7684\u306a\u8a31\u53ef\u304c\u51fa\u3055\u308c\u308b\u308f\u3051\u3067\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u306eDORA\u30d7\u30ed\u30bb\u30b9\u304c\u5b8c\u4e86\u3059\u308b\u3068\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306fDHCP\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u5272\u308a\u5f53\u3066\u3089\u308c\u305fIP\u30a2\u30c9\u30ec\u30b9\u3084\u305d\u306e\u4ed6\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u60c5\u5831\u3092\u4f7f\u3063\u3066\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u542b\u3080\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u306fIP\u30a2\u30c9\u30ec\u30b9\u306e\u624b\u52d5\u8a2d\u5b9a\u3068\u3044\u3046\u624b\u9593\u304b\u3089\u89e3\u653e\u3055\u308c\u308b\u306e\u3067\u3059\u3002<\/p>\n<h4>3.3 DNS\u3068DHCP\u306e\u9023\u643a\uff1a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3078\u306e\u30b9\u30e0\u30fc\u30ba\u306a\u9053\u6848\u5185<\/h4>\n<p>DNS\u3068DHCP\u306f\u3001\u4e00\u898b\u3059\u308b\u3068\u72ec\u7acb\u3057\u305f\u5f79\u5272\u3092\u6301\u3063\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u5b9f\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u306b\u304a\u3044\u3066\u5bc6\u63a5\u306b\u9023\u643a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>DHCP\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u5272\u308a\u5f53\u3066\u308b\u969b\u306b\u3001**\u300c\u3069\u306eDNS\u30b5\u30fc\u30d0\u30fc\u3092\u4f7f\u3048\u3070\u3044\u3044\u304b\u300d\u3068\u3044\u3046\u60c5\u5831\u3082\u540c\u6642\u306b\u63d0\u4f9b**\u3057\u307e\u3059\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u306b\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u3060\u3051\u3067\u306a\u304f\u3001\u540d\u524d\u89e3\u6c7a\u306e\u305f\u3081\u306eDNS\u30b5\u30fc\u30d0\u30fc\u306e\u60c5\u5831\u3082\u4e0d\u53ef\u6b20\u3060\u304b\u3089\u3067\u3059\u3002<\/li>\n<li>\u5177\u4f53\u7684\u306b\u306f\u3001DHCP Offer\u3084DHCP ACK\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u4e2d\u306b\u3001DHCP\u30b5\u30fc\u30d0\u30fc\u81ea\u8eab\u304c\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u63a8\u5968\u3059\u308bDNS\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u3053\u306e\u60c5\u5831\u3092\u53d7\u3051\u53d6\u308a\u3001\u305d\u306eDNS\u30b5\u30fc\u30d0\u30fc\u3092\u30ea\u30be\u30eb\u30d0\u3068\u3057\u3066\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u524d\u8ff0\u3057\u305fDNS\u306e\u540d\u524d\u89e3\u6c7a\u30d7\u30ed\u30bb\u30b9\u3092\u958b\u59cb\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u3064\u307e\u308a\u3001DHCP\u304c\u30c7\u30d0\u30a4\u30b9\u306b\u300c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3078\u306e\u5165\u308a\u53e3\u300d\u3068\u3057\u3066\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068\u3001\u305d\u306e\u5165\u308a\u53e3\u304b\u3089\u300c\u76ee\u7684\u5730\uff08\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306a\u3069\uff09\u3092\u63a2\u3059\u305f\u3081\u306e\u5730\u56f3\u300d\u3068\u3057\u3066\u306eDNS\u30b5\u30fc\u30d0\u30fc\u306e\u60c5\u5831\u3092\u81ea\u52d5\u3067\u4e0e\u3048\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u8a2d\u5b9a\u306e\u624b\u9593\u306a\u304f\u3001\u30b9\u30e0\u30fc\u30ba\u306b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u5229\u7528\u3067\u304d\u308b\u74b0\u5883\u304c\u6574\u3046\u308f\u3051\u3067\u3059\u306d\u3002\u3053\u306e\u4e8c\u3064\u306e\u6280\u8853\u304c\u624b\u3092\u53d6\u308a\u5408\u3046\u3053\u3068\u3067\u3001\u79c1\u305f\u3061\u306e\u5feb\u9069\u306a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30e9\u30a4\u30d5\u306f\u5b9f\u73fe\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3059\u3002<\/p>\n<h3>4. \u306a\u305c\uff1f\u304c\u308f\u304b\u308b\u6df1\u6398\u308a\u89e3\u8aac<\/h3>\n<p>DNS\u3068DHCP\u306e\u57fa\u672c\u7684\u306a\u4ed5\u7d44\u307f\u306f\u3054\u7406\u89e3\u3044\u305f\u3060\u3051\u305f\u3067\u3057\u3087\u3046\u304b\uff1f \u3053\u3053\u304b\u3089\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u6280\u8853\u306b\u3064\u3044\u3066\u3001\u3055\u3089\u306b\u4e00\u6b69\u8e0f\u307f\u8fbc\u3093\u3067\u300c\u306a\u305c\uff1f\u300d\u305d\u3046\u306a\u308b\u306e\u304b\u3001\u305d\u3057\u3066\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3067\u554f\u308f\u308c\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u306b\u3064\u3044\u3066\u6df1\u6398\u308a\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h4>4.1 DNS\u306e\u6df1\u6398\u308a\uff1a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u591a\u69d8\u306a\u30ec\u30b3\u30fc\u30c9\u306e\u5f79\u5272<\/h4>\n<h5>\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u306e\u5371\u967a\u6027<\/h5>\n<p>DNS\u306e\u4ed5\u7d44\u307f\u3067\u767b\u5834\u3057\u305f\u300c\u30ea\u30be\u30eb\u30d0\u300d\uff08DNS\u30b5\u30fc\u30d0\u30fc\uff09\u306f\u3001\u901a\u5e38\u3001\u7279\u5b9a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306b\u306e\u307f\u5fdc\u7b54\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u8ab0\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306b\u3082\u5fdc\u7b54\u3057\u3066\u3057\u307e\u3046DNS\u30b5\u30fc\u30d0\u30fc\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u3053\u308c\u304c\u300c\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u300d\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u306f\u3001\u60aa\u610f\u306e\u3042\u308b\u653b\u6483\u8005\u306b\u3088\u3063\u3066\u60aa\u7528\u3055\u308c\u308b\u3068\u3001\u975e\u5e38\u306b\u5371\u967a\u306a\u5b58\u5728\u3068\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001**DNS\u30a2\u30f3\u30d7\uff08\u5897\u5e45\uff09\u653b\u6483**\u3068\u3044\u3046DDoS\u653b\u6483\u306e\u8e0f\u307f\u53f0\u306b\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u653b\u6483\u8005\u306f\u3001\u507d\u88c5\u3057\u305f\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\uff08\u653b\u6483\u5bfe\u8c61\u306eIP\u30a2\u30c9\u30ec\u30b9\uff09\u3092\u4f7f\u3063\u3066\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u306b\u5927\u91cf\u306e\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3044\u307e\u3059\u3002\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u306f\u3001\u305d\u306e\u507d\u88c5\u3055\u308c\u305fIP\u30a2\u30c9\u30ec\u30b9\u306b\u5bfe\u3057\u3066\u3001\u554f\u3044\u5408\u308f\u305b\u306e\u4f55\u500d\u3082\u306e\u5927\u304d\u306a\u5fdc\u7b54\u3092\u8fd4\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u653b\u6483\u5bfe\u8c61\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u304c\u9001\u308a\u3064\u3051\u3089\u308c\u3001\u30b5\u30fc\u30d3\u30b9\u505c\u6b62\u306b\u8ffd\u3044\u8fbc\u307e\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u653b\u6483\u3092\u9632\u3050\u305f\u3081\u306b\u3082\u3001DNS\u30b5\u30fc\u30d0\u30fc\u306f\u4fe1\u983c\u3067\u304d\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306e\u307f\u306b\u5fdc\u7b54\u3059\u308b\u3088\u3046\u306b\u9069\u5207\u306b\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n<h5>DNSSEC\u306b\u3088\u308b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5f37\u5316<\/h5>\n<p>DNS\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u6839\u5e79\u3092\u652f\u3048\u308b\u30b5\u30fc\u30d3\u30b9\u3067\u3059\u304c\u3001\u305d\u306e\u521d\u671f\u306e\u8a2d\u8a08\u306b\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u5f31\u70b9\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u7279\u306b\u3001\u300cDNS\u5fdc\u7b54\u306e\u507d\u88c5\uff08\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\uff09\u300d\u3068\u3044\u3046\u653b\u6483\u306f\u5927\u304d\u306a\u8105\u5a01\u3067\u3059\u3002<\/p>\n<p>\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3068\u306f\u3001\u653b\u6483\u8005\u304cDNS\u30b5\u30fc\u30d0\u30fc\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u507d\u306e\u60c5\u5831\u3092\u9001\u308a\u8fbc\u307f\u3001\u7279\u5b9a\u306e\u30c9\u30e1\u30a4\u30f3\u540d\u306b\u5bfe\u3057\u3066\u8aa4\u3063\u305fIP\u30a2\u30c9\u30ec\u30b9\u3092\u7d10\u4ed8\u3051\u3066\u3057\u307e\u3046\u653b\u6483\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u6b63\u898f\u306e\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u3066\u3082\u3001\u653b\u6483\u8005\u304c\u7528\u610f\u3057\u305f\u507d\u30b5\u30a4\u30c8\u306b\u8a98\u5c0e\u3055\u308c\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8105\u5a01\u306b\u5bfe\u6297\u3059\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u305f\u306e\u304c\u3001**DNSSEC\uff08Domain Name System Security Extensions\uff09**\u3067\u3059\u3002DNSSEC\u306f\u3001DNS\u306e\u5fdc\u7b54\u306b\u300c\u96fb\u5b50\u7f72\u540d\u300d\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u60c5\u5831\u304c\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3001\u305d\u3057\u3066\u6b63\u898f\u306eDNS\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u3089\u308c\u3066\u304d\u305f\u3082\u306e\u3067\u3042\u308b\u3053\u3068\u3092\u691c\u8a3c\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u6280\u8853\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001DNS\u5fdc\u7b54\u306e\u4fe1\u983c\u6027\u304c\u5411\u4e0a\u3057\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306e\u3088\u3046\u306a\u653b\u6483\u304b\u3089\u4fdd\u8b77\u3055\u308c\u308b\u308f\u3051\u3067\u3059\u306d\u3002<\/p>\n<p>DNSSEC\u306f\u3001\u5358\u306b\u30c9\u30e1\u30a4\u30f3\u540d\u3092IP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u305d\u306e\u5909\u63db\u7d50\u679c\u304c\u300c\u672c\u7269\u300d\u3067\u3042\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u308b\u4e0a\u3067\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h5>DNS\u306b\u4fdd\u5b58\u3055\u308c\u308b\u5404\u7a2e\u30ec\u30b3\u30fc\u30c9\u306e\u7528\u9014\u3068\u5f79\u5272\u3001\u9055\u3044<\/h5>\n<p>DNS\u30b5\u30fc\u30d0\u30fc\u306b\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u3068IP\u30a2\u30c9\u30ec\u30b9\u306e\u5bfe\u5fdc\u95a2\u4fc2\u3060\u3051\u3067\u306a\u304f\u3001\u69d8\u3005\u306a\u60c5\u5831\u304c\u300c\u30ea\u30bd\u30fc\u30b9\u30ec\u30b3\u30fc\u30c9\u300d\u3068\u3044\u3046\u5f62\u5f0f\u3067\u4fdd\u5b58\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3067\u3082\u3088\u304f\u51fa\u984c\u3055\u308c\u308b\u4e3b\u8981\u306a\u30ec\u30b3\u30fc\u30c9\u306e\u7a2e\u985e\u3068\u3001\u305d\u306e\u7528\u9014\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li><strong>A\u30ec\u30b3\u30fc\u30c9\uff08Address Record\uff09\uff1a<\/strong> \u3053\u308c\u306f\u6700\u3082\u57fa\u672c\u7684\u306a\u30ec\u30b3\u30fc\u30c9\u3067\u3001\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u30db\u30b9\u30c8\u540d\uff09\u306b\u5bfe\u5fdc\u3059\u308bIPv4\u30a2\u30c9\u30ec\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u300cwww.example.com\u300d\u304c\u300c192.0.2.1\u300d\u3068\u3044\u3046IP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u3053\u3068\u3092\u793a\u3057\u307e\u3059\u3002<\/li>\n<li><strong>AAAA\u30ec\u30b3\u30fc\u30c9\uff08IPv6 Address Record\uff09\uff1a<\/strong> A\u30ec\u30b3\u30fc\u30c9\u306eIPv6\u7248\u3067\u3059\u3002\u30c9\u30e1\u30a4\u30f3\u540d\u306b\u5bfe\u5fdc\u3059\u308bIPv6\u30a2\u30c9\u30ec\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002IPv6\u306e\u666e\u53ca\u306b\u4f34\u3044\u3001\u3053\u306e\u30ec\u30b3\u30fc\u30c9\u306e\u91cd\u8981\u6027\u304c\u5897\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><strong>MX\u30ec\u30b3\u30fc\u30c9\uff08Mail Exchange Record\uff09\uff1a<\/strong> \u7279\u5b9a\u306e\u30c9\u30e1\u30a4\u30f3\u5b9b\u306e\u30e1\u30fc\u30eb\u3092\u51e6\u7406\u3059\u308b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u30db\u30b9\u30c8\u540d\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u30e1\u30fc\u30eb\u306e\u914d\u9001\u306b\u304a\u3044\u3066\u4e0d\u53ef\u6b20\u306a\u30ec\u30b3\u30fc\u30c9\u3067\u3059\u3002\u300cexample.com\u5b9b\u306e\u30e1\u30fc\u30eb\u306f\u3001\u3053\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u9001\u3063\u3066\u306d\u300d\u3068\u3044\u3046\u6307\u793a\u3092\u51fa\u3059\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/li>\n<li><strong>CNAME\u30ec\u30b3\u30fc\u30c9\uff08Canonical Name Record\uff09\uff1a<\/strong> \u3042\u308b\u30db\u30b9\u30c8\u540d\u306b\u5225\u306e\u30db\u30b9\u30c8\u540d\u306e\u300c\u5225\u540d\u300d\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u300cblog.example.com\u300d\u3092\u300cwww.example.com\u300d\u306e\u5225\u540d\u3068\u3057\u3066\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5b9f\u969b\u306eIP\u30a2\u30c9\u30ec\u30b9\u306e\u5909\u66f4\u304c\u3042\u3063\u305f\u5834\u5408\u3067\u3082\u3001CNAME\u306e\u53c2\u7167\u5143\u3092\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u6e08\u3080\u305f\u3081\u3001\u7ba1\u7406\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>NS\u30ec\u30b3\u30fc\u30c9\uff08Name Server Record\uff09\uff1a<\/strong> \u305d\u306e\u30c9\u30e1\u30a4\u30f3\u306eDNS\u60c5\u5831\u3092\u7ba1\u7406\u3057\u3066\u3044\u308b\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc\uff08\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\uff09\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u3069\u306eDNS\u30b5\u30fc\u30d0\u30fc\u304c\u7279\u5b9a\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u60c5\u5831\u3092\u300c\u6a29\u5a01\u7684\u306b\u300d\u6301\u3063\u3066\u3044\u308b\u306e\u304b\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/li>\n<li><strong>TXT\u30ec\u30b3\u30fc\u30c9\uff08Text Record\uff09\uff1a<\/strong> \u30c9\u30e1\u30a4\u30f3\u540d\u306b\u95a2\u9023\u3059\u308b\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306e\u30ec\u30b3\u30fc\u30c9\u3067\u3059\u3002DMARC\u3001SPF\u3001DKIM\u3068\u3044\u3063\u305f\u30e1\u30fc\u30eb\u306e\u8a8d\u8a3c\u6280\u8853\u3067\u3001\u9001\u4fe1\u5143\u304c\u507d\u88c5\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306e\u60c5\u5831\u3092\u516c\u958b\u3059\u308b\u969b\u306b\u3088\u304f\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>SOA\u30ec\u30b3\u30fc\u30c9\uff08Start of Authority Record\uff09\uff1a<\/strong> \u30be\u30fc\u30f3\uff08DNS\u60c5\u5831\u306e\u7ba1\u7406\u5358\u4f4d\uff09\u306e\u958b\u59cb\u3092\u793a\u3059\u30ec\u30b3\u30fc\u30c9\u3067\u3001\u305d\u306e\u30be\u30fc\u30f3\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc\u3001\u7ba1\u7406\u8005\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001\u30be\u30fc\u30f3\u306e\u5404\u7a2e\u30d1\u30e9\u30e1\u30fc\u30bf\uff08\u66f4\u65b0\u9593\u9694\u3001\u30ea\u30c8\u30e9\u30a4\u9593\u9694\u3001\u6709\u52b9\u671f\u9650\u306a\u3069\uff09\u304c\u8a18\u8ff0\u3055\u308c\u3066\u3044\u307e\u3059\u3002DNS\u30b5\u30fc\u30d0\u30fc\u9593\u306e\u60c5\u5831\u540c\u671f\uff08\u30be\u30fc\u30f3\u8ee2\u9001\uff09\u3092\u9069\u5207\u306b\u884c\u3046\u305f\u3081\u306b\u91cd\u8981\u306a\u60c5\u5831\u3067\u3059\u3002<\/li>\n<li><strong>PTR\u30ec\u30b3\u30fc\u30c9\uff08Pointer Record\uff09\uff1a<\/strong> IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30c9\u30e1\u30a4\u30f3\u540d\u3078\u306e\u9006\u5f15\u304d\u89e3\u6c7a\u306b\u4f7f\u7528\u3055\u308c\u308b\u30ec\u30b3\u30fc\u30c9\u3067\u3059\u3002A\u30ec\u30b3\u30fc\u30c9\u306e\u9006\u306e\u50cd\u304d\u3092\u3057\u307e\u3059\u3002\u4e3b\u306b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u8a8d\u8a3c\u3084\u3001\u30ed\u30b0\u89e3\u6790\u306a\u3069\u3067\u5229\u7528\u3055\u308c\u307e\u3059\u3002\u30b9\u30d1\u30e0\u30e1\u30fc\u30eb\u5bfe\u7b56\u3068\u3057\u3066\u3082\u91cd\u8981\u8996\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u30ec\u30b3\u30fc\u30c9\u306f\u3001\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u76ee\u7684\u3067DNS\u306b\u767b\u9332\u3055\u308c\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u69d8\u3005\u306a\u30b5\u30fc\u30d3\u30b9\u304c\u6b63\u3057\u304f\u6a5f\u80fd\u3059\u308b\u305f\u3081\u306b\u4e0d\u53ef\u6b20\u306a\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4>4.2 DHCP\u306e\u6df1\u6398\u308a\uff1a\u8a2d\u5b9a\u3068\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306e\u5f79\u5272<\/h4>\n<h5>DHCP\u30b5\u30fc\u30d0\u30fc\u306e\u6a5f\u80fd\u3068\u8a2d\u5b9a<\/h5>\n<p>DHCP\u30b5\u30fc\u30d0\u30fc\u306f\u3001\u5358\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u5272\u308a\u5f53\u3066\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u306b\u5fc5\u8981\u306a\u69d8\u3005\u306a\u60c5\u5831\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u4e3b\u8981\u306a\u8a2d\u5b9a\u9805\u76ee\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30a2\u30c9\u30ec\u30b9\u30d7\u30fc\u30eb\uff1a<\/strong> DHCP\u30b5\u30fc\u30d0\u30fc\u304c\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5272\u308a\u5f53\u3066\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u7bc4\u56f2\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u300c192.168.1.100\u304b\u3089192.168.1.200\u307e\u3067\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u5272\u308a\u5f53\u3066\u308b\u300d\u3068\u3044\u3063\u305f\u8a2d\u5b9a\u3067\u3059\u3002<\/li>\n<li><strong>\u30ea\u30fc\u30b9\u671f\u9593\uff1a<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u8cb8\u3057\u51fa\u3059\u671f\u9593\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u671f\u9593\u304c\u904e\u304e\u308b\u3068\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306fIP\u30a2\u30c9\u30ec\u30b9\u306e\u518d\u53d6\u5f97\uff08\u66f4\u65b0\uff09\u3092\u8a66\u307f\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u4f7f\u7528\u3055\u308c\u3066\u3044\u306a\u3044IP\u30a2\u30c9\u30ec\u30b9\u3092\u56de\u53ce\u3057\u3001\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u30aa\u30d7\u30b7\u30e7\u30f3\u8a2d\u5b9a\uff1a<\/strong> IP\u30a2\u30c9\u30ec\u30b9\u4ee5\u5916\u306b\u3082\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u306a\u69d8\u3005\u306a\u60c5\u5831\u3092\u63d0\u4f9b\u3067\u304d\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a\u3082\u306e\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002\n<ul>\n<li><strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\uff1a<\/strong> \u5916\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306a\u3069\uff09\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u30eb\u30fc\u30bf\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3067\u3059\u3002\u3053\u308c\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u30ed\u30fc\u30ab\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5916\u3068\u306e\u901a\u4fe1\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<li><strong>DNS\u30b5\u30fc\u30d0\u30fc\uff1a<\/strong> \u524d\u8ff0\u306eDNS\u306e\u540d\u524d\u89e3\u6c7a\u3092\u884c\u3046\u305f\u3081\u306eDNS\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3067\u3059\u3002\u3053\u308c\u304c\u306a\u3051\u308c\u3070\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u3067\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<li>\u305d\u306e\u4ed6\u3001WINS\u30b5\u30fc\u30d0\u30fc\uff08Windows\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u5229\u7528\uff09\u3001NTP\u30b5\u30fc\u30d0\u30fc\uff08\u6642\u523b\u540c\u671f\uff09\u3001\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u691c\u7d22\u30c9\u30e1\u30a4\u30f3\uff09\u306a\u3069\u306e\u60c5\u5831\u3082\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u8a2d\u5b9a\u3092\u9069\u5207\u306b\u884c\u3046\u3053\u3068\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7ba1\u7406\u8005\u306fIP\u30a2\u30c9\u30ec\u30b9\u306e\u7af6\u5408\u3092\u9632\u304e\u3001\u52b9\u7387\u7684\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u904b\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h5>DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306e\u5f79\u5272<\/h5>\n<p>DHCP Discover\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u901a\u5e38\u3001\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\uff08\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u5185\u306e\u5168\u3066\u306e\u30c7\u30d0\u30a4\u30b9\u306b\u9001\u4fe1\u3055\u308c\u308b\uff09\u3068\u3057\u3066\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30eb\u30fc\u30bf\u30fc\u3092\u8d8a\u3048\u3066\u5225\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u306f\u5c4a\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u3088\u3046\u306b\u3001\u90e8\u7f72\u3054\u3068\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u304c\u5206\u304b\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u305d\u308c\u305e\u308c\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u306bDHCP\u30b5\u30fc\u30d0\u30fc\u3092\u8a2d\u7f6e\u3059\u308b\u306e\u306f\u975e\u52b9\u7387\u7684\u3067\u3059\u3002\u305d\u3053\u3067\u767b\u5834\u3059\u308b\u306e\u304c\u3001**DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8**\u3067\u3059\u3002<\/p>\n<p>DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306f\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u306bDHCP\u30b5\u30fc\u30d0\u30fc\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u3067\u3082\u3001DHCP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u5f79\u5272\u3092\u62c5\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u306eDHCP Discover\uff08\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\uff09\u30e1\u30c3\u30bb\u30fc\u30b8\u3092DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u304c\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002<\/li>\n<li>DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306f\u3001\u305d\u306e\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u3001\u3042\u3089\u304b\u3058\u3081\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bDHCP\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u5b9b\u306b\u30e6\u30cb\u30ad\u30e3\u30b9\u30c8\uff08\u7279\u5b9a\u306e\u5b9b\u5148\u306b\u76f4\u63a5\u9001\u4fe1\uff09\u3067\u8ee2\u9001\u3057\u307e\u3059\u3002<\/li>\n<li>DHCP\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u5fdc\u7b54\uff08Offer, ACK\u306a\u3069\uff09\u3082\u3001DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u3092\u7d4c\u7531\u3057\u3066\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5c4a\u3051\u3089\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u898f\u6a21\u304c\u5927\u304d\u304f\u3001\u8907\u6570\u306e\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u5206\u304b\u308c\u3066\u3044\u3066\u3082\u3001 centralized \u306aDHCP\u30b5\u30fc\u30d0\u30fc\u3067IP\u30a2\u30c9\u30ec\u30b9\u306e\u4e00\u5143\u7ba1\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u904b\u7528\u306e\u52b9\u7387\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306f\u3001\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u306e\u9650\u754c\u3092\u8d85\u3048\u3066DHCP\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3059\u308b\u3001\u91cd\u8981\u306a\u6a4b\u6e21\u3057\u5f79\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<h3>5. \u53b3\u9078\u904e\u53bb\u554f\u3068\u601d\u8003\u30c8\u30ec\u30fc\u30b9<\/h3>\n<p>\u3055\u3066\u3001DNS\u3068DHCP\u306e\u57fa\u672c\u304b\u3089\u6df1\u6398\u308a\u307e\u3067\u3001\u3057\u3063\u304b\u308a\u3068\u77e5\u8b58\u3092\u30a4\u30f3\u30d7\u30c3\u30c8\u3057\u3066\u304d\u307e\u3057\u305f\u306d\u3002\u3053\u3053\u304b\u3089\u306f\u3001\u3044\u3088\u3044\u3088\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u904e\u53bb\u554f\u306b\u6311\u6226\u3057\u3001\u5b66\u3093\u3060\u77e5\u8b58\u3092\u300c\u4f7f\u3048\u308b\u529b\u300d\u306b\u5909\u3048\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u5358\u306b\u7b54\u3048\u3092\u899a\u3048\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u3069\u306e\u3088\u3046\u306b\u601d\u8003\u3092\u7d44\u307f\u7acb\u3066\u3066\u6b63\u89e3\u306b\u305f\u3069\u308a\u7740\u304f\u304b\u3092\u4e00\u7dd2\u306b\u898b\u3066\u3044\u304f\u306e\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\n<h4>\u554f\u984c1\uff1aDNS\u306e\u540d\u524d\u89e3\u6c7a\u306b\u95a2\u3059\u308b\u554f\u984c<\/h4>\n<p><strong>\u3010\u554f\u984c\u3011<\/strong>\uff08\u203b\u5b9f\u969b\u306e\u904e\u53bb\u554f\u3068\u5168\u304f\u540c\u3058\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u985e\u984c\u3068\u3057\u3066\u51fa\u984c\u3055\u308c\u307e\u3059\u3002\uff09<br \/>\nWeb\u30d6\u30e9\u30a6\u30b6\u3067\u300cwww.example.co.jp\u300d\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u304c\u6700\u521d\u306b\u540d\u524d\u89e3\u6c7a\u306e\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3046DNS\u30b5\u30fc\u30d0\u30fc\u306f\u3069\u308c\u304b\u3002\u6b21\u306e\u9078\u629e\u80a2\u304b\u3089\u9069\u5207\u306a\u3082\u306e\u3092\u9078\u3079\u3002<\/p>\n<ol>\n<li>\u30eb\u30fc\u30c8DNS\u30b5\u30fc\u30d0\u30fc<\/li>\n<li>TLD\uff08\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u30c9\u30e1\u30a4\u30f3\uff09DNS\u30b5\u30fc\u30d0\u30fc<\/li>\n<li>\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc<\/li>\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\uff08\u30ea\u30be\u30eb\u30d0\uff09<\/li>\n<\/ol>\n<p><strong>\u3010\u601d\u8003\u30c8\u30ec\u30fc\u30b9\u3011<\/strong><\/p>\n<ol>\n<li><strong>\u554f\u984c\u6587\u306e\u628a\u63e1\uff1a<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u304c\u300c\u6700\u521d\u306b\u300d\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3046DNS\u30b5\u30fc\u30d0\u30fc\u3092\u554f\u308f\u308c\u3066\u3044\u308b\u3002\u30dd\u30a4\u30f3\u30c8\u306f\u300c\u6700\u521d\u300d\u3068\u3044\u3046\u8a00\u8449\u3067\u3059\u306d\u3002<\/li>\n<li><strong>DNS\u306e\u540d\u524d\u89e3\u6c7a\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u601d\u3044\u51fa\u3059\uff1a<\/strong> \u30bb\u30af\u30b7\u30e7\u30f33.1\u3067\u5b66\u7fd2\u3057\u305f\u300cDNS\u306e\u4ed5\u7d44\u307f\u3092\u56f3\u3067\u89e3\u8aac\u300d\u3092\u982d\u306e\u4e2d\u3067\u8fbf\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002PC\u306f\u307e\u305a\u3001\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308bDNS\u30b5\u30fc\u30d0\u30fc\u306b\u554f\u3044\u5408\u308f\u305b\u3092\u3059\u308b\u3001\u3068\u3044\u3046\u6d41\u308c\u3067\u3057\u305f\u306d\u3002<\/li>\n<li><strong>\u5404\u9078\u629e\u80a2\u306e\u5f79\u5272\u3092\u78ba\u8a8d\uff1a<\/strong>\n<ul>\n<li>\u30eb\u30fc\u30c8DNS\u30b5\u30fc\u30d0\u30fc\uff1a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u6700\u4e0a\u4f4d\u306b\u3042\u308a\u3001TLD\u30b5\u30fc\u30d0\u30fc\u306e\u60c5\u5831\u3092\u6559\u3048\u3066\u304f\u308c\u308b\u30b5\u30fc\u30d0\u30fc\u3067\u3057\u305f\u3002\u6700\u521d\u306b\u76f4\u63a5\u554f\u3044\u5408\u308f\u305b\u308b\u76f8\u624b\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li>TLD DNS\u30b5\u30fc\u30d0\u30fc\uff1a.com\u3084.jp\u306a\u3069\u306e\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u30c9\u30e1\u30a4\u30f3\u3092\u7ba1\u7406\u3059\u308b\u30b5\u30fc\u30d0\u30fc\u3067\u3057\u305f\u3002\u3053\u308c\u3082\u76f4\u63a5\u554f\u3044\u5408\u308f\u305b\u308b\u76f8\u624b\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li>\u6a29\u5a01DNS\u30b5\u30fc\u30d0\u30fc\uff1a\u7279\u5b9a\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u6700\u7d42\u7684\u306aIP\u30a2\u30c9\u30ec\u30b9\u3092\u77e5\u3063\u3066\u3044\u308b\u30b5\u30fc\u30d0\u30fc\u3067\u3057\u305f\u3002\u3053\u308c\u3082\u76f4\u63a5\u554f\u3044\u5408\u308f\u305b\u308b\u76f8\u624b\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li>\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\uff08\u30ea\u30be\u30eb\u30d0\uff09\uff1a\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u3092\u53d7\u3051\u4ed8\u3051\u3001\u540d\u524d\u89e3\u6c7a\u306e\u4ee3\u884c\u3092\u884c\u3046\u30b5\u30fc\u30d0\u30fc\u3067\u3057\u305f\u3002PC\u304c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u63a5\u7d9a\u3059\u308b\u969b\u306b\u3001\u901a\u5e38\u3001\u3053\u306e\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7d50\u8ad6\uff1a<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u304c\u6700\u521d\u306b\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3046\u306e\u306f\u3001\u81ea\u8eab\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u3067\u6307\u5b9a\u3055\u308c\u3066\u3044\u308b\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\uff08\u30ea\u30be\u30eb\u30d0\uff09\u3067\u3059\u3002\u30ea\u30be\u30eb\u30d0\u304c\u3001\u305d\u306e\u5f8c\u306e\u30eb\u30fc\u30c8\u2192TLD\u2192\u6a29\u5a01DNS\u3068\u3044\u3046\u554f\u3044\u5408\u308f\u305b\u3092\u4ee3\u884c\u3057\u3066\u304f\u308c\u308b\u306e\u3067\u3057\u305f\u306d\u3002<\/li>\n<\/ol>\n<p><strong>\u3010\u6b63\u89e3\u3011<\/strong> 4<\/p>\n<h4>\u554f\u984c2\uff1aDHCP\u3068DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306b\u95a2\u3059\u308b\u554f\u984c<\/h4>\n<p><strong>\u3010\u554f\u984c\u3011<\/strong>\uff08\u203b\u5b9f\u969b\u306e\u904e\u53bb\u554f\u3068\u5168\u304f\u540c\u3058\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u985e\u984c\u3068\u3057\u3066\u51fa\u984c\u3055\u308c\u307e\u3059\u3002\uff09<br \/>\n\u8907\u6570\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u304c\u5b58\u5728\u3059\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u3001\u5404\u30b5\u30d6\u30cd\u30c3\u30c8\u306bDHCP\u30b5\u30fc\u30d0\u30fc\u3092\u914d\u7f6e\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u5358\u4e00\u306eDHCP\u30b5\u30fc\u30d0\u30fc\u3067IP\u30a2\u30c9\u30ec\u30b9\u306e\u4e00\u5143\u7ba1\u7406\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u5229\u7528\u3055\u308c\u308b\u6280\u8853\u306f\u3069\u308c\u304b\u3002<\/p>\n<ol>\n<li>NAT<\/li>\n<li>DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8<\/li>\n<li>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc<\/li>\n<li>VLAN<\/li>\n<\/ol>\n<p><strong>\u3010\u601d\u8003\u30c8\u30ec\u30fc\u30b9\u3011<\/strong><\/p>\n<ol>\n<li><strong>\u554f\u984c\u6587\u306e\u628a\u63e1\uff1a<\/strong> \u300c\u8907\u6570\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u300d\u3068\u300c\u5358\u4e00\u306eDHCP\u30b5\u30fc\u30d0\u30fc\u300d\u3068\u3044\u3046\u30ad\u30fc\u30ef\u30fc\u30c9\u304c\u91cd\u8981\u3067\u3059\u3002\u305d\u3057\u3066\u3001\u300c\u5404\u30b5\u30d6\u30cd\u30c3\u30c8\u306bDHCP\u30b5\u30fc\u30d0\u30fc\u3092\u914d\u7f6e\u3059\u308b\u3053\u3068\u306a\u304f\u300d\u3068\u3044\u3046\u70b9\u304b\u3089\u3001\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u304c\u30eb\u30fc\u30bf\u30fc\u3092\u8d8a\u3048\u3089\u308c\u306a\u3044\u3068\u3044\u3046DHCP\u306e\u7279\u6027\u3092\u601d\u3044\u51fa\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>DHCP\u306eDORA\u30d7\u30ed\u30bb\u30b9\u3092\u601d\u3044\u51fa\u3059\uff1a<\/strong> Discover\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3067\u3057\u305f\u306d\u3002\u3053\u308c\u304c\u30eb\u30fc\u30bf\u30fc\u3092\u8d8a\u3048\u3089\u308c\u306a\u3044\u305f\u3081\u3001\u901a\u5e38\u306f\u540c\u3058\u30bb\u30b0\u30e1\u30f3\u30c8\u306bDHCP\u30b5\u30fc\u30d0\u30fc\u304c\u5fc5\u8981\u3067\u3059\u3002<\/li>\n<li><strong>\u30bb\u30af\u30b7\u30e7\u30f34.2\u306eDHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306e\u5f79\u5272\u3092\u601d\u3044\u51fa\u3059\uff1a<\/strong> \u300c\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u306bDHCP\u30b5\u30fc\u30d0\u30fc\u304c\u3042\u308b\u5834\u5408\u3067\u3082\u3001DHCP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u300d\u6280\u8853\u3068\u3057\u3066\u3001DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306e\u89e3\u8aac\u304c\u3042\u308a\u307e\u3057\u305f\u306d\u3002\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3092\u30e6\u30cb\u30ad\u30e3\u30b9\u30c8\u306b\u5909\u63db\u3057\u3066DHCP\u30b5\u30fc\u30d0\u30fc\u306b\u8ee2\u9001\u3059\u308b\u5f79\u5272\u3067\u3059\u3002<\/li>\n<li><strong>\u5404\u9078\u629e\u80a2\u306e\u5f79\u5272\u3092\u78ba\u8a8d\uff1a<\/strong>\n<ul>\n<li>NAT\uff1aIP\u30a2\u30c9\u30ec\u30b9\u5909\u63db\u3092\u884c\u3046\u6280\u8853\u3067\u3001DHCP\u3068\u306f\u76f4\u63a5\u95a2\u4fc2\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<li>DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\uff1a\u307e\u3055\u306b\u554f\u984c\u6587\u306e\u8981\u6c42\u306b\u5408\u81f4\u3059\u308b\u6280\u8853\u3067\u3059\u3002<\/li>\n<li>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\uff1a\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30fc\u30d0\u30fc\u306e\u9593\u306b\u7acb\u3063\u3066\u901a\u4fe1\u3092\u4e2d\u7d99\u3059\u308b\u30b5\u30fc\u30d0\u30fc\u3067\u3001\u76ee\u7684\u304c\u7570\u306a\u308a\u307e\u3059\u3002<\/li>\n<li>VLAN\uff1a\u7269\u7406\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u8ad6\u7406\u7684\u306b\u5206\u5272\u3059\u308b\u6280\u8853\u3067\u3059\u304c\u3001DHCP\u30b5\u30fc\u30d0\u30fc\u3092\u4e00\u5143\u5316\u3059\u308b\u76f4\u63a5\u7684\u306a\u624b\u6bb5\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u7d50\u8ad6\uff1a<\/strong> \u8907\u6570\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u307e\u305f\u3044\u3067\u5358\u4e00\u306eDHCP\u30b5\u30fc\u30d0\u30fc\u3092\u5229\u7528\u3059\u308b\u306b\u306f\u3001DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u304c\u5fc5\u9808\u3067\u3059\u3002<\/li>\n<\/ol>\n<p><strong>\u3010\u6b63\u89e3\u3011<\/strong> 2<\/p>\n<p>\u3044\u304b\u304c\u3067\u3057\u305f\u3067\u3057\u3087\u3046\u304b\uff1f \u904e\u53bb\u554f\u3092\u89e3\u304f\u969b\u306b\u306f\u3001\u5358\u306b\u6b63\u89e3\u3092\u9078\u3076\u3060\u3051\u3067\u306a\u304f\u3001\u306a\u305c\u305d\u306e\u9078\u629e\u80a2\u304c\u6b63\u3057\u3044\u306e\u304b\u3001\u4ed6\u306e\u9078\u629e\u80a2\u306f\u306a\u305c\u9055\u3046\u306e\u304b\u3092\u8aac\u660e\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u307e\u3067\u3001\u601d\u8003\u3092\u6df1\u3081\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002\u3053\u306e\u601d\u8003\u30c8\u30ec\u30fc\u30b9\u3092\u53c2\u8003\u306b\u3001\u305c\u3072\u3054\u81ea\u8eab\u3067\u3082\u69d8\u3005\u306a\u904e\u53bb\u554f\u306b\u6311\u6226\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n<h3>6. \u672a\u6765\u3092\u4e88\u6e2c\u3059\u308b\u51fa\u984c\u4e88\u60f3<\/h3>\n<p>\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306f\u3001\u5358\u306a\u308b\u77e5\u8b58\u306e\u6709\u7121\u3092\u554f\u3046\u3060\u3051\u3067\u306a\u304f\u3001IT\u6280\u8853\u306e\u6700\u65b0\u30c8\u30ec\u30f3\u30c9\u3084\u793e\u4f1a\u60c5\u52e2\u306e\u5909\u5316\u306b\u3082\u76ee\u3092\u5411\u3051\u3066\u3044\u307e\u3059\u3002DNS\u3068DHCP\u3082\u4f8b\u5916\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u3053\u3067\u306f\u3001\u73fe\u5728\u306e\u6280\u8853\u52d5\u5411\u3084\u8a66\u9a13\u8981\u7db1\u306e\u5909\u66f4\u70b9\uff08Ver.5.4\uff09\u3092\u8e0f\u307e\u3048\u3001\u4eca\u5f8c\u51fa\u984c\u3055\u308c\u305d\u3046\u306a\u30c6\u30fc\u30de\u3084\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u5927\u80c6\u306b\u4e88\u60f3\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>[cite_start]<\/p>\n<p>\u60c5\u5831\u51e6\u7406\u6280\u8853\u8005\u8a66\u9a13\u306e\u8a66\u9a13\u8981\u7db1Ver.5.4\u3067\u306f\u30012025\u5e74\uff08\u4ee4\u548c7\u5e74\uff094\u670817\u65e5\u4ed8\u3051\u3067\u3001\u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30de\u30cd\u30b8\u30e1\u30f3\u30c8\u8a66\u9a13\u3001\u57fa\u672c\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3001\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3001\u9ad8\u5ea6\u8a66\u9a13\u3001\u652f\u63f4\u58eb\u8a66\u9a13\u306e\u300c\u79d1\u76eeA\u8a66\u9a13\u3001\u5348\u524d\u306e\u8a66\u9a13\u300d\u306b\u304a\u3051\u308b\u51fa\u984c\u7bc4\u56f2\u306e\u4e00\u90e8\u7528\u8a9e\u304c\u898b\u76f4\u3055\u308c\u3066\u3044\u307e\u3059 [cite: 12]\u3002\u3053\u308c\u306f\u3001\u5e38\u306b\u6700\u65b0\u306eIT\u52d5\u5411\u304c\u8a66\u9a13\u306b\u53cd\u6620\u3055\u308c\u308b\u3053\u3068\u3092\u793a\u5506\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4>1. IPv6\u306e\u666e\u53ca\u3068DNS\/DHCPv6\u306e\u6df1\u5316<\/h4>\n<p>\u73fe\u5728\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306eIP\u30a2\u30c9\u30ec\u30b9\u306fIPv4\u304c\u4e3b\u6d41\u3067\u3059\u304c\u3001\u30a2\u30c9\u30ec\u30b9\u67af\u6e07\u306e\u554f\u984c\u304b\u3089IPv6\u3078\u306e\u79fb\u884c\u304c\u9032\u3093\u3067\u3044\u307e\u3059\u3002\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3067\u3082\u3001IPv6\u306b\u95a2\u3059\u308b\u77e5\u8b58\u306f\u5e74\u3005\u91cd\u8981\u5ea6\u3092\u5897\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>IPv6\u30a2\u30c9\u30ec\u30b9\u306e\u7406\u89e3\uff1a<\/strong> IPv4\u30a2\u30c9\u30ec\u30b9\uff08A\u30ec\u30b3\u30fc\u30c9\uff09\u3060\u3051\u3067\u306a\u304f\u3001IPv6\u30a2\u30c9\u30ec\u30b9\u3092\u6271\u3046AAAA\u30ec\u30b3\u30fc\u30c9\u306b\u95a2\u3059\u308b\u554f\u984c\u304c\u5897\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u30a2\u30c9\u30ec\u30b9\u306e\u5f62\u5f0f\u3084\u7701\u7565\u8a18\u6cd5\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u62e1\u5f35\u6a5f\u80fd\u306a\u3069\u3082\u554f\u308f\u308c\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/li>\n<li><strong>DHCPv6\u3068SLAAC\uff1a<\/strong> IPv6\u74b0\u5883\u3067\u306eIP\u30a2\u30c9\u30ec\u30b9\u306e\u5272\u308a\u5f53\u3066\u65b9\u6cd5\u3068\u3057\u3066\u3001DHCPv6\uff08DHCP for IPv6\uff09\u3060\u3051\u3067\u306a\u304f\u3001\u30eb\u30fc\u30bf\u30fc\u5e83\u544a\uff08RA\uff09\u306b\u3088\u308bSLAAC\uff08Stateless Address Autoconfiguration\uff1a\u30b9\u30c6\u30fc\u30c8\u30ec\u30b9\u30a2\u30c9\u30ec\u30b9\u81ea\u52d5\u8a2d\u5b9a\uff09\u306e\u4ed5\u7d44\u307f\u3082\u91cd\u8981\u3067\u3059\u3002\u3053\u308c\u3089\u304c\u3069\u306e\u3088\u3046\u306b\u9023\u643a\u3057\u3001\u3042\u308b\u3044\u306f\u4f7f\u3044\u5206\u3051\u3089\u308c\u308b\u304b\u3001\u5177\u4f53\u7684\u306a\u30b7\u30ca\u30ea\u30aa\u3092\u554f\u3046\u554f\u984c\u304c\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<h4>2. DNS\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u91cd\u8981\u6027\u3068DDoS\u653b\u6483\u5bfe\u7b56<\/h4>\n<p>\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306e\u9ad8\u5ea6\u5316\u306b\u4f34\u3044\u3001DNS\u3092\u72d9\u3063\u305f\u653b\u6483\u3084\u3001DNS\u304c\u60aa\u7528\u3055\u308c\u308b\u30b1\u30fc\u30b9\u304c\u5897\u3048\u3066\u3044\u307e\u3059\u3002\u30bb\u30af\u30b7\u30e7\u30f34.1\u3067\u89e3\u8aac\u3057\u305f\u5185\u5bb9\u304c\u3001\u3088\u308a\u5b9f\u8df5\u7684\u306a\u5f62\u3067\u554f\u308f\u308c\u308b\u3068\u4e88\u60f3\u3055\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>DNSSEC\u306e\u5177\u4f53\u7684\u306a\u9069\u7528\u30b7\u30ca\u30ea\u30aa\uff1a<\/strong> DNSSEC\u306e\u5c0e\u5165\u306b\u3088\u308b\u30e1\u30ea\u30c3\u30c8\u3060\u3051\u3067\u306a\u304f\u3001\u5c0e\u5165\u306b\u4f34\u3046\u8ab2\u984c\uff08\u9375\u7ba1\u7406\u306a\u3069\uff09\u3084\u3001\u5b9f\u969b\u306e\u691c\u8a3c\u30d7\u30ed\u30bb\u30b9\u3092\u7406\u89e3\u3057\u3066\u3044\u308b\u304b\u3092\u554f\u3046\u554f\u984c\u304c\u51fa\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/li>\n<li><strong>\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u5bfe\u7b56\u306e\u5fb9\u5e95\uff1a<\/strong> \u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u304c\u60aa\u7528\u3055\u308c\u308bDNS\u30a2\u30f3\u30d7\u653b\u6483\u3084DDoS\u653b\u6483\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u7406\u89e3\u3057\u3001\u305d\u306e\u5bfe\u7b56\uff08DNS\u30b5\u30fc\u30d0\u30fc\u306e\u8a2d\u5b9a\u3001FW\u3067\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u306a\u3069\uff09\u3092\u554f\u3046\u554f\u984c\u304c\u5f15\u304d\u7d9a\u304d\u91cd\u8981\u3067\u3059\u3002<\/li>\n<li><strong>DNS over HTTPS (DoH) \/ DNS over TLS (DoT)\uff1a<\/strong> DNS\u901a\u4fe1\u306e\u6697\u53f7\u5316\u6280\u8853\u306b\u95a2\u3059\u308b\u51fa\u984c\u3082\u8003\u3048\u3089\u308c\u307e\u3059\u3002\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u4fdd\u8b77\u3084\u4e2d\u9593\u8005\u653b\u6483\u5bfe\u7b56\u3068\u3057\u3066\u6ce8\u76ee\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u305d\u306e\u6982\u5ff5\u3084\u5229\u70b9\u3001\u666e\u53ca\u72b6\u6cc1\u306b\u95a2\u3059\u308b\u77e5\u8b58\u304c\u554f\u308f\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h4>3. \u30af\u30e9\u30a6\u30c9\u74b0\u5883\u306b\u304a\u3051\u308bDNS\/DHCP\u306e\u6d3b\u7528<\/h4>\n<p>\u4f01\u696d\u30b7\u30b9\u30c6\u30e0\u304c\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u304b\u3089\u30af\u30e9\u30a6\u30c9\u3078\u79fb\u884c\u3059\u308b\u4e2d\u3067\u3001\u30af\u30e9\u30a6\u30c9\u74b0\u5883\u3067\u306eDNS\u3084DHCP\u306e\u5229\u7528\u65b9\u6cd5\u3082\u8a66\u9a13\u7bc4\u56f2\u306b\u542b\u307e\u308c\u3066\u304f\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30af\u30e9\u30a6\u30c9\u30d7\u30ed\u30d0\u30a4\u30c0\u306eDNS\u30b5\u30fc\u30d3\u30b9\uff1a<\/strong> AWS Route 53\u3084Google Cloud DNS\u306a\u3069\u3001\u4e3b\u8981\u306a\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d3\u30b9\u304c\u63d0\u4f9b\u3059\u308bDNS\u30b5\u30fc\u30d3\u30b9\u306e\u6a5f\u80fd\u3084\u7279\u5fb4\u306b\u95a2\u3059\u308b\u77e5\u8b58\u304c\u554f\u308f\u308c\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/li>\n<li><strong>VPC\/VNet\u5185\u3067\u306eDHCP\/DNS\uff1a<\/strong> \u30af\u30e9\u30a6\u30c9\u4e0a\u306e\u4eee\u60f3\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08VPC\u3084VNet\uff09\u306b\u304a\u3051\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u5272\u308a\u5f53\u3066\u3084\u540d\u524d\u89e3\u6c7a\u304c\u3001\u3069\u306e\u3088\u3046\u306b\u884c\u308f\u308c\u3066\u3044\u308b\u304b\u306b\u95a2\u3059\u308b\u554f\u984c\u3082\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<h4>4. DNS\u30ec\u30b3\u30fc\u30c9\u306e\u5fdc\u7528\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h4>\n<p>\u30bb\u30af\u30b7\u30e7\u30f34.1\u3067\u89e3\u8aac\u3057\u305f\u5404\u7a2eDNS\u30ec\u30b3\u30fc\u30c9\u306b\u3064\u3044\u3066\u3001\u305d\u306e\u7528\u9014\u3092\u6df1\u304f\u7406\u89e3\u3057\u3001\u5b9f\u969b\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u5fdc\u7528\u3067\u304d\u308b\u304b\u304c\u554f\u308f\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30e1\u30fc\u30eb\u914d\u9001\u306e\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\uff1a<\/strong> MX\u30ec\u30b3\u30fc\u30c9\u3001SPF\u3001DKIM\uff08TXT\u30ec\u30b3\u30fc\u30c9\uff09\u304c\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306e\u30e1\u30fc\u30eb\u914d\u9001\u554f\u984c\u306e\u89e3\u6c7a\u7b56\u3092\u554f\u3046\u554f\u984c\u3002<\/li>\n<li><strong>Web\u30b5\u30a4\u30c8\u306e\u79fb\u884c\u3084\u8ca0\u8377\u5206\u6563\uff1a<\/strong> CNAME\u30ec\u30b3\u30fc\u30c9\u3084\u3001\u8907\u6570\u306eA\u30ec\u30b3\u30fc\u30c9\u3092\u5229\u7528\u3057\u305f\u8ca0\u8377\u5206\u6563\uff08\u30e9\u30a6\u30f3\u30c9\u30ed\u30d3\u30f3DNS\uff09\u306e\u8003\u3048\u65b9\u3092\u554f\u3046\u554f\u984c\u3002<\/li>\n<li><strong>\u30ed\u30b0\u5206\u6790\u3068PTR\u30ec\u30b3\u30fc\u30c9\uff1a<\/strong> \u30b5\u30fc\u30d0\u30fc\u306e\u30a2\u30af\u30bb\u30b9\u30ed\u30b0\u89e3\u6790\u306a\u3069\u3067\u3001IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30db\u30b9\u30c8\u540d\u3092\u7279\u5b9a\u3059\u308bPTR\u30ec\u30b3\u30fc\u30c9\u306e\u5f79\u5272\u3092\u554f\u3046\u554f\u984c\u3002<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306e\u51fa\u984c\u4e88\u60f3\u306f\u3001DNS\u3068DHCP\u306e\u77e5\u8b58\u3092\u3088\u308a\u5b9f\u8df5\u7684\u304b\u3064\u591a\u89d2\u7684\u306b\u6df1\u3081\u308b\u305f\u3081\u306e\u30d2\u30f3\u30c8\u3068\u306a\u308b\u3067\u3057\u3087\u3046\u3002\u6700\u65b0\u306eIT\u30cb\u30e5\u30fc\u30b9\u306b\u3082\u76ee\u3092\u5411\u3051\u306a\u304c\u3089\u3001\u95a2\u9023\u3059\u308b\u6280\u8853\u306e\u52d5\u5411\u3092\u8ffd\u3063\u3066\u3044\u304f\u3068\u3001\u3088\u308a\u52b9\u679c\u7684\u306a\u8a66\u9a13\u5bfe\u7b56\u304c\u3067\u304d\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<h3>7. \u77e5\u8b58\u3092\u4f53\u7cfb\u5316\u3059\u308b\u95a2\u9023\u30de\u30c3\u30d7<\/h3>\n<p>DNS\u3068DHCP\u306e\u77e5\u8b58\u306f\u3001\u5358\u72ec\u3067\u5b58\u5728\u3059\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3084IT\u30b7\u30b9\u30c6\u30e0\u306e\u69d8\u3005\u306a\u8981\u7d20\u3068\u5bc6\u63a5\u306b\u95a2\u308f\u308a\u5408\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001DNS\u3068DHCP\u304c\u4ed6\u306eIT\u5206\u91ce\u3068\u3069\u306e\u3088\u3046\u306b\u95a2\u9023\u3057\u3066\u3044\u308b\u304b\u3092\u8996\u899a\u7684\u306a\u30de\u30c3\u30d7\u3068\u3057\u3066\u6349\u3048\u3001\u77e5\u8b58\u3092\u4f53\u7cfb\u7684\u306b\u6574\u7406\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u3064\u306a\u304c\u308a\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5e45\u5e83\u3044\u7bc4\u56f2\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u5b9f\u52d9\u3067\u306e\u554f\u984c\u89e3\u6c7a\u80fd\u529b\u3082\u5411\u4e0a\u3057\u307e\u3059\u3088\u3002<\/p>\n<h4>1. \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08\u57fa\u76e4\uff09<\/h4>\n<p>DNS\u3068DHCP\u306f\u3001\u307e\u3055\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u300c\u571f\u53f0\u300d\u3092\u652f\u3048\u308b\u6280\u8853\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>IP\u30a2\u30c9\u30ec\u30b9\uff1a<\/strong> DHCP\u304c\u81ea\u52d5\u3067\u5272\u308a\u5f53\u3066\u3001DNS\u304c\u30c9\u30e1\u30a4\u30f3\u540d\u3068\u7d10\u3065\u3051\u308b\u6839\u672c\u7684\u306a\u8b58\u5225\u5b50\u3067\u3059\u3002IPv4\u3060\u3051\u3067\u306a\u304f\u3001IPv6\u306e\u7406\u89e3\u3082\u6df1\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/li>\n<li><strong>\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff1a<\/strong> IP\u30a2\u30c9\u30ec\u30b9\u304c\u5206\u304b\u3063\u3066\u521d\u3081\u3066\u3001\u30c7\u30fc\u30bf\u306f\u76ee\u7684\u5730\u307e\u3067\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3055\u308c\u307e\u3059\u3002DNS\u304cIP\u30a2\u30c9\u30ec\u30b9\u3092\u63d0\u4f9b\u3057\u3001DHCP\u304c\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306b\u5fc5\u8981\u306a\u30c7\u30d5\u30a9\u30eb\u30c8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u3092\u6559\u3048\u3066\u304f\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u30b5\u30d6\u30cd\u30c3\u30c8\u5316\uff1a<\/strong> DHCP\u304cIP\u30a2\u30c9\u30ec\u30b9\u3092\u5272\u308a\u5f53\u3066\u308b\u969b\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3082\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u3069\u306e\u3088\u3046\u306b\u5206\u5272\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u30c7\u30d0\u30a4\u30b9\u304c\u8a8d\u8b58\u3067\u304d\u307e\u3059\u3002DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u306f\u3001\u7570\u306a\u308b\u30b5\u30d6\u30cd\u30c3\u30c8\u9593\u306eDHCP\u901a\u4fe1\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/li>\n<li><strong>TCP\/IP\uff1a<\/strong> \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u57fa\u672c\u7684\u306a\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u7fa4\u3067\u3059\u3002DNS\u3084DHCP\u3082\u3053\u306eTCP\/IP\u4e0a\u3067\u52d5\u4f5c\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002<\/li>\n<\/ul>\n<h4>2. \u60c5\u5831\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\uff08\u9632\u5fa1\u3068\u4fe1\u983c\uff09<\/h4>\n<p>DNS\u306f\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306e\u6a19\u7684\u306b\u306a\u308a\u3084\u3059\u304f\u3001DHCP\u3082\u4e0d\u9069\u5207\u306a\u8a2d\u5b9a\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3092\u62db\u304d\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5206\u91ce\u3068\u306e\u95a2\u9023\u306f\u975e\u5e38\u306b\u6df1\u3044\u3067\u3059\u3002<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>[cite_start]<\/p>\n<li><strong>DNSSEC\uff1a<\/strong> DNS\u5fdc\u7b54\u306e\u6539\u3056\u3093\u3092\u9632\u304e\u3001\u540d\u524d\u89e3\u6c7a\u306e\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u308b\u305f\u3081\u306e\u96fb\u5b50\u7f72\u540d\u6280\u8853\u3067\u3059 [cite: 434]\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>[cite_start]<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>DDoS\u653b\u6483\uff1a<\/strong> \u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u304c\u60aa\u7528\u3055\u308c\u308bDNS\u30a2\u30f3\u30d7\u653b\u6483\u306a\u3069\u3001DNS\u306fDDoS\u653b\u6483\u306e\u8e0f\u307f\u53f0\u306b\u3055\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306a\u8a2d\u5b9a\u3068\u76e3\u8996\u304c\u91cd\u8981\u3067\u3059 [cite: 434]\u3002<\/li>\n<li><strong>\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\uff08FW\uff09\/ IDS\/IPS\uff1a<\/strong> \u4e0d\u6b63\u306aDNS\u30af\u30a8\u30ea\u3084DHCP\u30ea\u30af\u30a8\u30b9\u30c8\u3001\u3042\u308b\u3044\u306f\u305d\u308c\u3089\u3092\u5229\u7528\u3057\u305f\u653b\u6483\u3092\u9632\u3050\u305f\u3081\u306b\u3001\u3053\u308c\u3089\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u5668\u3067\u306e\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3084\u76e3\u8996\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/li>\n<li><strong>\u30ed\u30b0\u7ba1\u7406\uff1a<\/strong> DNS\u3084DHCP\u306e\u30ed\u30b0\u3092\u9069\u5207\u306b\u53ce\u96c6\u30fb\u5206\u6790\u3059\u308b\u3053\u3068\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7570\u5e38\u691c\u77e5\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u767a\u751f\u6642\u306e\u539f\u56e0\u7a76\u660e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002PTR\u30ec\u30b3\u30fc\u30c9\u304c\u30ed\u30b0\u89e3\u6790\u3067\u5f79\u7acb\u3064\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>[cite_start]<\/p>\n<ul>\n<li><strong>\u5185\u90e8\u4e0d\u6b63\u5bfe\u7b56\uff1a<\/strong> DHCP\u306b\u3088\u308a\u4e0d\u6b63\u306a\u30c7\u30d0\u30a4\u30b9\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u308b\u30ea\u30b9\u30af\u3084\u3001DNS\u306e\u8a2d\u5b9a\u3092\u60aa\u7528\u3057\u305f\u5185\u90e8\u304b\u3089\u306e\u60c5\u5831\u6f0f\u3048\u3044\u30ea\u30b9\u30af\u3082\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059 [cite: 436]\u3002<\/li>\n<\/ul>\n<h4>3. \u30b5\u30fc\u30d0\u30fc\u69cb\u7bc9\u30fb\u30b7\u30b9\u30c6\u30e0\u904b\u7528\uff08\u5b89\u5b9a\u7a3c\u50cd\u3068\u52b9\u7387\u5316\uff09<\/h4>\n<p>DNS\u3068DHCP\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u5b89\u5b9a\u7a3c\u50cd\u3001\u305d\u3057\u3066\u65e5\u3005\u306e\u904b\u7528\u52b9\u7387\u5316\u306b\u76f4\u7d50\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>Web\u30b5\u30fc\u30d0\u30fc\/\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\uff1a<\/strong> \u3053\u308c\u3089\u306e\u30b5\u30fc\u30d3\u30b9\u3092\u516c\u958b\u3059\u308b\u306b\u306f\u3001\u30c9\u30e1\u30a4\u30f3\u540d\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u7d10\u3065\u3051\u308bDNS\uff08A\u30ec\u30b3\u30fc\u30c9\u3001MX\u30ec\u30b3\u30fc\u30c9\u306a\u3069\uff09\u306e\u8a2d\u5b9a\u304c\u5fc5\u9808\u3067\u3059\u3002<\/li>\n<li><strong>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30b5\u30fc\u30d3\u30b9\uff08\u4f8b: Active Directory\uff09\uff1a<\/strong> \u591a\u304f\u306e\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u3001Active Directory\u306e\u3088\u3046\u306a\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30b5\u30fc\u30d3\u30b9\u304cDNS\u3068\u5bc6\u63a5\u306b\u9023\u643a\u3057\u3001\u540d\u524d\u89e3\u6c7a\u3084\u8a8d\u8a3c\u306e\u57fa\u76e4\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><strong>\u53ef\u7528\u6027\/\u5197\u9577\u5316\uff1a<\/strong> \u8907\u6570\u306eDNS\u30b5\u30fc\u30d0\u30fc\u3092\u914d\u7f6e\u3057\u305f\u308a\u3001DHCP\u30b5\u30fc\u30d0\u30fc\u3092\u5197\u9577\u5316\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u3067\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u53ef\u7528\u6027\u3092\u9ad8\u3081\u307e\u3059\u3002<\/li>\n<li><strong>\u81ea\u52d5\u5316\/\u69cb\u6210\u7ba1\u7406\uff1a<\/strong> DHCP\u306b\u3088\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u81ea\u52d5\u5272\u308a\u5f53\u3066\u306f\u3001IT\u8cc7\u7523\u306e\u69cb\u6210\u7ba1\u7406\u3092\u52b9\u7387\u5316\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002<\/li>\n<\/ul>\n<h4>4. \u30af\u30e9\u30a6\u30c9\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\uff08\u67d4\u8edf\u6027\u3068\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\uff09<\/h4>\n<p>\u30af\u30e9\u30a6\u30c9\u30b5\u30fc\u30d3\u30b9\u306e\u5229\u7528\u304c\u62e1\u5927\u3059\u308b\u4e2d\u3067\u3001DNS\u3068DHCP\u306e\u5f79\u5272\u3082\u5909\u5316\u3057\u3001\u65b0\u305f\u306a\u5074\u9762\u304c\u6ce8\u76ee\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>VPC\/VNet\uff1a<\/strong> \u5404\u30af\u30e9\u30a6\u30c9\u30d7\u30ed\u30d0\u30a4\u30c0\u304c\u63d0\u4f9b\u3059\u308b\u4eee\u60f3\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08VPC\u3084VNet\uff09\u5185\u3067\u306f\u3001DHCP\u3068DNS\u304c\u9023\u643a\u3057\u3066\u4eee\u60f3\u30de\u30b7\u30f3\u3084\u30b3\u30f3\u30c6\u30ca\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u5272\u308a\u5f53\u3066\u3001\u540d\u524d\u89e3\u6c7a\u3092\u884c\u3044\u307e\u3059\u3002<\/li>\n<li><strong>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\uff1a<\/strong> \u30c9\u30e1\u30a4\u30f3\u540d\u3067\u30a2\u30af\u30bb\u30b9\u3055\u308c\u305f\u969b\u306b\u3001\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u5206\u6563\u3055\u305b\u308b\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u306e\u88cf\u5074\u3067\u306f\u3001DNS\u306e\u540d\u524d\u89e3\u6c7a\u304c\u95a2\u308f\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><strong>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\/\u30b3\u30f3\u30c6\u30ca\uff1a<\/strong> \u52d5\u7684\u306bIP\u30a2\u30c9\u30ec\u30b9\u304c\u5909\u308f\u308b\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3084\u30b3\u30f3\u30c6\u30ca\u74b0\u5883\u3067\u306f\u3001\u30b5\u30fc\u30d3\u30b9\u30c7\u30a3\u30b9\u30ab\u30d0\u30ea\u306e\u305f\u3081\u306bDNS\u3084DHCP\u306e\u3088\u3046\u306a\u540d\u524d\u89e3\u6c7a\u306e\u4ed5\u7d44\u307f\u304c\u5185\u90e8\u7684\u306b\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001DNS\u3068DHCP\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u57fa\u790e\u304b\u3089\u6700\u65b0\u306e\u30af\u30e9\u30a6\u30c9\u6280\u8853\u3001\u305d\u3057\u3066\u30b5\u30a4\u30d0\u30fc\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u81f3\u308b\u307e\u3067\u3001\u5e45\u5e83\u3044IT\u5206\u91ce\u3067\u305d\u306e\u5b58\u5728\u304c\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u6280\u8853\u304c\u3069\u306e\u3088\u3046\u306b\u9023\u643a\u3057\u3001\u76f8\u4e92\u306b\u5f71\u97ff\u3057\u5408\u3063\u3066\u3044\u308b\u306e\u304b\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u6df1\u3044\u6d1e\u5bdf\u529b\u304c\u990a\u308f\u308c\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<h3>8. \u3042\u306a\u305f\u3060\u3051\u306e\u5b66\u7fd2\u30ed\u30fc\u30c9\u30de\u30c3\u30d7<\/h3>\n<p>DNS\u3068DHCP\u306b\u3064\u3044\u3066\u3001\u3053\u3053\u307e\u3067\u3067\u304b\u306a\u308a\u6df1\u304f\u7406\u89e3\u304c\u9032\u3093\u3060\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\uff1f \u77e5\u8b58\u306f\u70b9\u3067\u306f\u306a\u304f\u3001\u7dda\u3067\u3064\u306a\u304c\u308b\u3053\u3068\u3067\u771f\u4fa1\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u3042\u306a\u305f\u304c\u3055\u3089\u306b\u5b66\u7fd2\u3092\u9032\u3081\u3001\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u306e\u5408\u683c\u3001\u305d\u3057\u3066\u305d\u306e\u5148\u306eIT\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u3068\u3057\u3066\u6210\u9577\u3059\u308b\u305f\u3081\u306e\u300c\u3042\u306a\u305f\u3060\u3051\u306e\u5b66\u7fd2\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u300d\u3092\u63d0\u6848\u3057\u307e\u3059\u3002<\/p>\n<h4>\u30b9\u30c6\u30c3\u30d71\uff1a\u57fa\u790e\u77e5\u8b58\u306e\u5fb9\u5e95\u5b9a\u7740\uff08\u518d\u78ba\u8a8d\u3068\u88dc\u5f37\uff09<\/h4>\n<p>\u307e\u305a\u306f\u3001\u4eca\u56de\u5b66\u3093\u3060DNS\u3068DHCP\u306e\u57fa\u790e\u3092\u76e4\u77f3\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li><strong>\u8a18\u4e8b\u306e\u8aad\u307f\u8fd4\u3057\uff1a<\/strong> \u3053\u306e\u8a18\u4e8b\u3092\u6700\u521d\u304b\u3089\u6700\u5f8c\u307e\u3067\u3001\u3082\u3046\u4e00\u5ea6\u8aad\u307f\u8fd4\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u7279\u306b\u300c3. \u5927\u56f3\u89e3\uff1aDNS\u3068DHCP\u306e\u5168\u4f53\u50cf\u3068\u4ed5\u7d44\u307f\u300d\u3068\u300c4. \u306a\u305c\uff1f\u304c\u308f\u304b\u308b\u6df1\u6398\u308a\u89e3\u8aac\u300d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306f\u3001\u56f3\u3092\u30a4\u30e1\u30fc\u30b8\u3057\u306a\u304c\u3089\u3001\u81ea\u5206\u306e\u8a00\u8449\u3067\u8aac\u660e\u3067\u304d\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/li>\n<li><strong>\u91cd\u8981\u7528\u8a9e\u306e\u6697\u8a18\u3068\u7406\u89e3\uff1a<\/strong> 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IT\u306e\u4e16\u754c\u306f\u5e38\u306b\u5909\u5316\u3057\u3066\u3044\u307e\u3059\u3002IPA\u306e\u8a66\u9a13\u8981\u7db1\u306e\u66f4\u65b0\u60c5\u5831\u3084\u3001IT\u95a2\u9023\u30cb\u30e5\u30fc\u30b9\u306b\u3082\u65e5\u5e38\u7684\u306b\u76ee\u3092\u901a\u3059\u7fd2\u6163\u3092\u3064\u3051\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u30ed\u30fc\u30c9\u30de\u30c3\u30d7\u304c\u3001\u3042\u306a\u305f\u306eIT\u5b66\u7fd2\u306e\u65c5\u3092\u3088\u308a\u8c4a\u304b\u3067\u5b9f\u308a\u591a\u3044\u3082\u306e\u306b\u3059\u308b\u624b\u52a9\u3051\u3068\u306a\u308c\u3070\u5e78\u3044\u3067\u3059\u3002\u7126\u3089\u305a\u3001\u4e00\u6b69\u305a\u3064\u7740\u5b9f\u306b\u9032\u3093\u3067\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n<h3>9. \u7406\u89e3\u5ea6\u30c1\u30a7\u30c3\u30af\uff06\u30c1\u30e3\u30ec\u30f3\u30b8\u30af\u30a4\u30ba<\/h3>\n<p>\u3053\u3053\u307e\u3067\u3001DNS\u3068DHCP\u306b\u3064\u3044\u3066\u5e45\u5e83\u304f\u5b66\u7fd2\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u77e5\u8b58\u304c\u3069\u308c\u3060\u3051\u5b9a\u7740\u3057\u3066\u3044\u308b\u304b\u3001\u305d\u3057\u3066\u5fdc\u7528\u529b\u3092\u8a66\u3059\u305f\u3081\u306b\u3001\u3053\u3053\u3067\u3044\u304f\u3064\u304b\u30af\u30a4\u30ba\u306b\u6311\u6226\u3057\u3066\u307f\u307e\u3057\u3087\u3046\uff01 \u7c21\u5358\u306a\u3082\u306e\u304b\u3089\u3001\u5c11\u3057\u982d\u3092\u4f7f\u3046\u30c1\u30e3\u30ec\u30f3\u30b8\u554f\u984c\u307e\u3067\u7528\u610f\u3057\u307e\u3057\u305f\u3002\u305c\u3072\u3001\u30da\u30f3\u3068\u7d19\u3001\u3042\u308b\u3044\u306f\u982d\u306e\u4e2d\u3067\u601d\u8003\u30c8\u30ec\u30fc\u30b9\u3092\u3057\u306a\u304c\u3089\u89e3\u3044\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n<h4>\u7406\u89e3\u5ea6\u30c1\u30a7\u30c3\u30af\u30af\u30a4\u30ba<\/h4>\n<p>\u307e\u305a\u306f\u3001\u57fa\u672c\u7684\u306a\u77e5\u8b58\u306e\u78ba\u8a8d\u3067\u3059\u3002<\/p>\n<p><strong>\u554f\u984c1\uff1a<\/strong> \u79c1\u305f\u3061\u304c\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6\u306b\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u4f8b: www.ipa.go.jp\uff09\u3092\u5165\u529b\u3057\u305f\u3068\u304d\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u901a\u4fe1\u306b\u5fc5\u8981\u306aIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u5229\u7528\u3059\u308b\u30b7\u30b9\u30c6\u30e0\u306f\u4f55\u3067\u3059\u304b\uff1f<\/p>\n<p><strong>\u554f\u984c2\uff1a<\/strong> \u65b0\u3057\u3044\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u3092Wi-Fi\u306b\u63a5\u7d9a\u3057\u305f\u969b\u3001IP\u30a2\u30c9\u30ec\u30b9\u3084\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306a\u3069\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u5b9a\u304c\u81ea\u52d5\u7684\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002\u3053\u306e\u81ea\u52d5\u5272\u308a\u5f53\u3066\u3092\u5b9f\u73fe\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u4f55\u3067\u3059\u304b\uff1f<\/p>\n<p><strong>\u554f\u984c3\uff1a<\/strong> DNS\u306b\u304a\u3044\u3066\u3001IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u9006\u5f15\u304d\u3067\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u7528\u3044\u3089\u308c\u308b\u30ec\u30b3\u30fc\u30c9\u30bf\u30a4\u30d7\u306f\u4f55\u3067\u3059\u304b\uff1f<\/p>\n<p><strong>\u554f\u984c4\uff1a<\/strong> DHCP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cDHCP\u30b5\u30fc\u30d0\u30fc\u304b\u3089IP\u30a2\u30c9\u30ec\u30b9\u3092\u81ea\u52d5\u53d6\u5f97\u3059\u308b\u969b\u306e\u4e00\u9023\u306e\u30d7\u30ed\u30bb\u30b9\u306e\u982d\u6587\u5b57\u3092\u3068\u3063\u305f\u540d\u79f0\u306f\u4f55\u3067\u3059\u304b\uff1f<\/p>\n<p><strong>\u554f\u984c5\uff1a<\/strong> \u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u304c\u60aa\u7528\u3055\u308c\u308b\u3068\u3001\u653b\u6483\u5bfe\u8c61\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u9001\u308a\u3064\u3051\u3001\u30b5\u30fc\u30d3\u30b9\u3092\u505c\u6b62\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u7a2e\u306e\u653b\u6483\u3092\u4f55\u3068\u547c\u3073\u307e\u3059\u304b\uff1f<\/p>\n<h5>\u7406\u89e3\u5ea6\u30c1\u30a7\u30c3\u30af\u30af\u30a4\u30ba\u89e3\u7b54\u3068\u89e3\u8aac<\/h5>\n<dl>\n<dt><strong>\u554f\u984c1\u306e\u89e3\u7b54\uff1a<\/strong> DNS\uff08Domain Name System\uff09<\/dt>\n<dd><strong>\u89e3\u8aac\uff1a<\/strong> DNS\u306f\u300c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u96fb\u8a71\u5e33\u300d\u3068\u3057\u3066\u3001\u4eba\u9593\u304c\u899a\u3048\u3084\u3059\u3044\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u7406\u89e3\u3067\u304d\u308bIP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3059\u308b\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u3002<\/dd>\n<dt><strong>\u554f\u984c2\u306e\u89e3\u7b54\uff1a<\/strong> DHCP\uff08Dynamic Host Configuration Protocol\uff09<\/dt>\n<dd><strong>\u89e3\u8aac\uff1a<\/strong> DHCP\u306f\u300cIP\u30a2\u30c9\u30ec\u30b9\u306e\u81ea\u52d5\u8ca9\u58f2\u6a5f\u300d\u306e\u3088\u3046\u306b\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u306b\u5fc5\u8981\u306a\u8a2d\u5b9a\u60c5\u5831\u3092\u81ea\u52d5\u3067\u5272\u308a\u5f53\u3066\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7ba1\u7406\u306e\u624b\u9593\u3092\u5927\u5e45\u306b\u524a\u6e1b\u3057\u307e\u3059\u3002<\/dd>\n<dt><strong>\u554f\u984c3\u306e\u89e3\u7b54\uff1a<\/strong> PTR\u30ec\u30b3\u30fc\u30c9<\/dt>\n<dd><strong>\u89e3\u8aac\uff1a<\/strong> PTR\u30ec\u30b3\u30fc\u30c9\u306f\u3001A\u30ec\u30b3\u30fc\u30c9\uff08\u30c9\u30e1\u30a4\u30f3\u540d\u304b\u3089IP\u30a2\u30c9\u30ec\u30b9\uff09\u3068\u306f\u9006\u306b\u3001IP\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u30c9\u30e1\u30a4\u30f3\u540d\u3092\u89e3\u6c7a\u3059\u308b\u300c\u9006\u5f15\u304d\u300d\u306e\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u4e3b\u306b\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\u306e\u8a8d\u8a3c\u3084\u30ed\u30b0\u89e3\u6790\u3067\u5229\u7528\u3055\u308c\u307e\u3059\u3002<\/dd>\n<dt><strong>\u554f\u984c4\u306e\u89e3\u7b54\uff1a<\/strong> DORA\u30d7\u30ed\u30bb\u30b9<\/dt>\n<dd><strong>\u89e3\u8aac\uff1a<\/strong> Discover\uff08\u767a\u898b\uff09\u3001Offer\uff08\u63d0\u4f9b\uff09\u3001Request\uff08\u8981\u6c42\uff09\u3001ACK\uff08\u627f\u8a8d\uff09\u306e4\u3064\u306e\u30b9\u30c6\u30c3\u30d7\u304b\u3089\u306a\u308b\u3001DHCP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3059\u308b\u307e\u3067\u306e\u4e00\u9023\u306e\u6d41\u308c\u3067\u3059\u3002<\/dd>\n<dt><strong>\u554f\u984c5\u306e\u89e3\u7b54\uff1a<\/strong> DNS\u30a2\u30f3\u30d7\uff08\u5897\u5e45\uff09\u653b\u6483 \/ DDoS\u653b\u6483<\/dt>\n<dd><strong>\u89e3\u8aac\uff1a<\/strong> \u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u304c\u60aa\u7528\u3055\u308c\u3001\u653b\u6483\u5bfe\u8c61\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u507d\u88c5\u3057\u3066\u5927\u91cf\u306e\u554f\u3044\u5408\u308f\u305b\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u5fdc\u7b54\u30c7\u30fc\u30bf\u3092\u5897\u5e45\u3055\u305b\u3066\u653b\u6483\u5bfe\u8c61\u306b\u9001\u308a\u3064\u3051\u308bDDoS\u653b\u6483\u306e\u4e00\u7a2e\u3067\u3059\u3002<\/dd>\n<\/dl>\n<h4>\u30c1\u30e3\u30ec\u30f3\u30b8\u30af\u30a4\u30ba<\/h4>\n<p>\u3053\u3053\u304b\u3089\u306f\u3001\u5c11\u3057\u5fdc\u7528\u7684\u306a\u554f\u984c\u3067\u3059\u3002\u3058\u3063\u304f\u308a\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><strong>\u554f\u984c1\uff1a<\/strong> \u3042\u306a\u305f\u306e\u4f1a\u793e\u3067\u306f\u3001\u65b0\u3057\u304f\u8907\u6570\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u6301\u3064\u5927\u898f\u6a21\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u69cb\u7bc9\u3057\u307e\u3057\u305f\u3002\u5404\u30b5\u30d6\u30cd\u30c3\u30c8\u306bDHCP\u30b5\u30fc\u30d0\u30fc\u3092\u500b\u5225\u306b\u914d\u7f6e\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u7ba1\u7406\u306e\u624b\u9593\u3092\u6e1b\u3089\u3059\u305f\u3081\u306b\u3001\u4e00\u7b87\u6240\u306bDHCP\u30b5\u30fc\u30d0\u30fc\u3092\u96c6\u4e2d\u3055\u305b\u305f\u3044\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u3001\u5404\u30b5\u30d6\u30cd\u30c3\u30c8\u304b\u3089\u306eDHCP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u96c6\u4e2dDHCP\u30b5\u30fc\u30d0\u30fc\u306b\u8ee2\u9001\u3059\u308b\u305f\u3081\u306b\u5fc5\u8981\u3068\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306e\u6a5f\u80fd\u3001\u307e\u305f\u306f\u305d\u306e\u5f79\u5272\u3092\u679c\u305f\u3059\u3082\u306e\u306f\u4f55\u3067\u3059\u304b\uff1f\u307e\u305f\u3001\u305d\u306e\u6a5f\u80fd\u304c\u5fc5\u8981\u3068\u306a\u308b\u6280\u8853\u7684\u306a\u7406\u7531\u3082\u7c21\u6f54\u306b\u8aac\u660e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><strong>\u554f\u984c2\uff1a<\/strong> Web\u30b5\u30a4\u30c8\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u4f1a\u793e\u3067\u3001\u6700\u8fd1\u3001DDoS\u653b\u6483\u306e\u4e00\u7a2e\u3067\u3042\u308b\u300cDNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u300d\u306e\u8105\u5a01\u304c\u6307\u6458\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u8105\u5a01\u304b\u3089Web\u30b5\u30a4\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u7d4c\u8def\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u3001DNS\u306e\u5fdc\u7b54\u60c5\u5831\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u6280\u8853\u3068\u3057\u3066\u6700\u3082\u6709\u52b9\u306a\u3082\u306e\u306f\u4f55\u3067\u3059\u304b\uff1f\u305d\u306e\u6280\u8853\u304c\u3069\u306e\u3088\u3046\u306b\u4fe1\u983c\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u306e\u304b\u3001\u7c21\u6f54\u306b\u8aac\u660e\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h5>\u30c1\u30e3\u30ec\u30f3\u30b8\u30af\u30a4\u30ba\u89e3\u7b54\u3068\u89e3\u8aac<\/h5>\n<dl>\n<dt><strong>\u554f\u984c1\u306e\u89e3\u7b54\uff1a<\/strong> DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8<\/dt>\n<dd><strong>\u89e3\u8aac\uff1a<\/strong> DHCP Discover\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u901a\u4fe1\u3067\u3042\u308a\u3001\u30eb\u30fc\u30bf\u30fc\u3092\u8d8a\u3048\u3066\u5225\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u306f\u5c4a\u304d\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001\u7570\u306a\u308b\u30b5\u30d6\u30cd\u30c3\u30c8\u306b\u3042\u308bDHCP\u30b5\u30fc\u30d0\u30fc\u306b\u76f4\u63a5\u5230\u9054\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p><strong>DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8<\/strong>\u306f\u3001DHCP\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u306e\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u306b\u3088\u308bDiscover\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u53d7\u3051\u53d6\u308b\u3068\u3001\u3042\u3089\u304b\u3058\u3081\u8a2d\u5b9a\u3055\u308c\u305fDHCP\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u5b9b\u306b\u3001\u30e6\u30cb\u30ad\u30e3\u30b9\u30c8\uff08\u7279\u5b9a\u306e\u5b9b\u5148\u3078\u306e\u901a\u4fe1\uff09\u3067\u305d\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8ee2\u9001\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u30eb\u30fc\u30bf\u30fc\u3092\u8d8a\u3048\u3066\u96c6\u4e2dDHCP\u30b5\u30fc\u30d0\u30fc\u306b\u5c4a\u304d\u3001DHCP\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u5fdc\u7b54\u3082\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u3092\u4ecb\u3057\u3066\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u8fd4\u3055\u308c\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u6301\u3064\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u3067IP\u30a2\u30c9\u30ec\u30b9\u306e\u4e00\u5143\u7ba1\u7406\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/dd>\n<dt><strong>\u554f\u984c2\u306e\u89e3\u7b54\uff1a<\/strong> DNSSEC\uff08Domain Name System Security Extensions\uff09<\/dt>\n<dd><strong>\u89e3\u8aac\uff1a<\/strong> DNS\u30ad\u30e3\u30c3\u30b7\u30e5\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u306f\u3001DNS\u30b5\u30fc\u30d0\u30fc\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u507d\u306e\u60c5\u5831\u3092\u9001\u308a\u8fbc\u307f\u3001\u30e6\u30fc\u30b6\u30fc\u3092\u8aa4\u3063\u305f\uff08\u60aa\u610f\u306e\u3042\u308b\uff09IP\u30a2\u30c9\u30ec\u30b9\u306b\u8a98\u5c0e\u3059\u308b\u653b\u6483\u3067\u3059\u3002<\/p>\n<p><strong>DNSSEC<\/strong>\u306f\u3001DNS\u306e\u5fdc\u7b54\u60c5\u5831\u306b<strong>\u96fb\u5b50\u7f72\u540d<\/strong>\u3092\u4ed8\u4e0e\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u60c5\u5831\u304c\u6b63\u898f\u306eDNS\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u9001\u4fe1\u3055\u308c\u305f\u3082\u306e\u3067\u3042\u308a\u3001\u304b\u3064\u9014\u4e2d\u3067\u6539\u3056\u3093\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u691c\u8a3c\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u6280\u8853\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001DNS\u306e\u5fdc\u7b54\u306e\u4fe1\u983c\u6027\u304c\u78ba\u4fdd\u3055\u308c\u3001\u507d\u306e\u60c5\u5831\u304c\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u308b\u3053\u3068\u3092\u9632\u304e\u3001\u7d50\u679c\u3068\u3057\u3066Web\u30b5\u30a4\u30c8\u3078\u306e\u30a2\u30af\u30bb\u30b9\u7d4c\u8def\u304c\u4fdd\u8b77\u3055\u308c\u307e\u3059\u3002<\/dd>\n<\/dl>\n<p>\u3059\u3079\u3066\u306e\u554f\u984c\u3001\u3044\u304b\u304c\u3067\u3057\u305f\u3067\u3057\u3087\u3046\u304b\uff1f \u5168\u554f\u6b63\u89e3\u3067\u304d\u305f\u65b9\u306f\u7d20\u6674\u3089\u3057\u3044\u3067\u3059\uff01 \u305d\u3046\u3067\u306a\u304b\u3063\u305f\u65b9\u3082\u3001\u9593\u9055\u3048\u305f\u554f\u984c\u3084\u81ea\u4fe1\u304c\u306a\u304b\u3063\u305f\u554f\u984c\u306b\u3064\u3044\u3066\u306f\u3001\u518d\u5ea6\u8a72\u5f53\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u8aad\u307f\u8fd4\u3057\u3066\u7406\u89e3\u3092\u6df1\u3081\u3066\u304f\u3060\u3055\u3044\u306d\u3002\u3053\u306e\u30af\u30a4\u30ba\u304c\u3001\u3042\u306a\u305f\u306e\u77e5\u8b58\u5b9a\u7740\u3068\u5fdc\u7528\u529b\u5411\u4e0a\u306e\u4e00\u52a9\u3068\u306a\u308c\u3070\u5e78\u3044\u3067\u3059\u3002<\/p>\n<h3>10. \u6700\u7d42\u30c1\u30a7\u30c3\u30af\u3068\u307e\u3068\u3081<\/h3>\n<p>\u304a\u75b2\u308c\u69d8\u3067\u3057\u305f\uff01 \u3053\u308c\u3067\u3001DNS\u3068DHCP\u306b\u95a2\u3059\u308b\u5305\u62ec\u7684\u306a\u5b66\u7fd2\u8a18\u4e8b\u304c\u5b8c\u6210\u3057\u307e\u3057\u305f\u3002\u3053\u3053\u307e\u3067\u8aad\u307f\u9032\u3081\u3066\u304f\u3060\u3055\u3063\u305f\u3042\u306a\u305f\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u300c\u3064\u306a\u304c\u308b\u300d\u4ed5\u7d44\u307f\u306e\u5965\u6df1\u3055\u306b\u89e6\u308c\u3001\u305d\u306e\u6839\u5e79\u3092\u652f\u3048\u308b\u6280\u8853\u306b\u3064\u3044\u3066\u6df1\u304f\u7406\u89e3\u3055\u308c\u305f\u3053\u3068\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u6700\u5f8c\u306b\u3001\u3053\u306e\u8a18\u4e8b\u3067\u5b66\u3093\u3060\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u518d\u78ba\u8a8d\u3057\u3001\u3042\u306a\u305f\u306eIT\u5b66\u7fd2\u306e\u6210\u529f\u3092\u6539\u3081\u3066\u79f0\u3048\u307e\u3057\u3087\u3046\u3002<\/p>\n<h4>DNS\u3068DHCP\uff1a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u7e01\u306e\u4e0b\u306e\u529b\u6301\u3061<\/h4>\n<ul>\n<li>[cite_start]<strong>DNS\uff08Domain Name System\uff09<\/strong>\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u300c\u96fb\u8a71\u5e33\u300d\u3067\u3059\u3002\u79c1\u305f\u3061\u304c\u4f7f\u3044\u6163\u308c\u305f\u30c9\u30e1\u30a4\u30f3\u540d\uff08\u4f8b: example.com\uff09\u3092\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u901a\u4fe1\u306b\u4f7f\u3046IP\u30a2\u30c9\u30ec\u30b9\u3078\u3068\u5909\u63db\u3059\u308b\u300c\u540d\u524d\u89e3\u6c7a\u300d\u306e\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u540d\u524d\u89e3\u6c7a\u306f\u3001\u30eb\u30fc\u30c8DNS\u3001TLD DNS\u3001\u6a29\u5a01DNS\u3001\u305d\u3057\u3066\u79c1\u305f\u3061\u306ePC\u306b\u6700\u3082\u8fd1\u3044\u30ea\u30be\u30eb\u30d0\uff08\u30ad\u30e3\u30c3\u30b7\u30e5DNS\u30b5\u30fc\u30d0\u30fc\uff09\u304c\u9023\u643a\u3057\u3066\u884c\u308f\u308c\u307e\u3059\u306d [cite: 70]\u3002<\/li>\n<li>[cite_start]<strong>DHCP\uff08Dynamic Host Configuration Protocol\uff09<\/strong>\u306f\u3001\u300cIP\u30a2\u30c9\u30ec\u30b9\u306e\u81ea\u52d5\u8ca9\u58f2\u6a5f\u300d\u3067\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u30c7\u30d0\u30a4\u30b9\u306b\u5bfe\u3057\u3001IP\u30a2\u30c9\u30ec\u30b9\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u3001\u305d\u3057\u3066DNS\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068\u3044\u3063\u305f\u3001\u901a\u4fe1\u306b\u5fc5\u8981\u306a\u8a2d\u5b9a\u60c5\u5831\u3092\u81ea\u52d5\u3067\u5272\u308a\u5f53\u3066\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7ba1\u7406\u306e\u624b\u9593\u304c\u5927\u5e45\u306b\u524a\u6e1b\u3055\u308c\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u7c21\u5358\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u306e\u3067\u3057\u305f [cite: 70]\u3002<\/li>\n<\/ul>\n<p>\u3053\u306e\u4e8c\u3064\u306e\u6280\u8853\u306f\u3001\u79c1\u305f\u3061\u304c\u610f\u8b58\u3059\u308b\u3053\u3068\u306a\u304f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u5229\u7528\u3067\u304d\u308b\u3001\u5feb\u9069\u306a\u30c7\u30b8\u30bf\u30eb\u30e9\u30a4\u30d5\u306e\u5b9f\u73fe\u306b\u4e0d\u53ef\u6b20\u306a\u5b58\u5728\u3067\u3059\u3002<\/p>\n<h4>\u6df1\u6398\u308a\u30dd\u30a4\u30f3\u30c8\u306e\u518d\u78ba\u8a8d<\/h4>\n<p>\u3055\u3089\u306b\u6df1\u304f\u6398\u308a\u4e0b\u3052\u305f\u5185\u5bb9\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u30dd\u30a4\u30f3\u30c8\u3082\u5b66\u7fd2\u3057\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li>[cite_start]<strong>DNS\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\uff1a<\/strong> \u4e0d\u7279\u5b9a\u591a\u6570\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306b\u5fdc\u7b54\u3057\u3066\u3057\u307e\u3046\u300c\u30aa\u30fc\u30d7\u30f3\u30ea\u30be\u30eb\u30d0\u300d\u306f\u3001DNS\u30a2\u30f3\u30d7\u653b\u6483\u306a\u3069\u306eDDoS\u653b\u6483\u306e\u8e0f\u307f\u53f0\u306b\u3055\u308c\u308b\u5371\u967a\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001DNS\u306e\u5fdc\u7b54\u60c5\u5831\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3057\u3001\u507d\u88c5\u3092\u9632\u3050\u305f\u3081\u306e\u6280\u8853\u304c\u300cDNSSEC\u300d\u3067\u3057\u305f [cite: 70]\u3002<\/li>\n<li>[cite_start]<strong>\u591a\u69d8\u306aDNS\u30ec\u30b3\u30fc\u30c9\uff1a<\/strong> A\uff08IPv4\u30a2\u30c9\u30ec\u30b9\uff09\u3001AAAA\uff08IPv6\u30a2\u30c9\u30ec\u30b9\uff09\u3001MX\uff08\u30e1\u30fc\u30eb\u30b5\u30fc\u30d0\u30fc\uff09\u3001CNAME\uff08\u5225\u540d\uff09\u3001NS\uff08\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc\uff09\u3001TXT\uff08\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\uff09\u3001SOA\uff08\u30be\u30fc\u30f3\u60c5\u5831\uff09\u3001PTR\uff08\u9006\u5f15\u304d\uff09\u306a\u3069\u3001\u69d8\u3005\u306a\u30ea\u30bd\u30fc\u30b9\u30ec\u30b3\u30fc\u30c9\u304c\u305d\u308c\u305e\u308c\u306e\u5f79\u5272\u3092\u6301\u3063\u3066DNS\u30b5\u30fc\u30d0\u30fc\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u5b66\u3073\u307e\u3057\u305f [cite: 70]\u3002<\/li>\n<li><strong>DHCP\u30ea\u30ec\u30fc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\uff1a<\/strong> 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