{"id":5590,"date":"2025-08-09T23:43:34","date_gmt":"2025-08-09T14:43:34","guid":{"rendered":"https:\/\/sky-peace.net\/?p=5590"},"modified":"2025-08-09T23:43:34","modified_gmt":"2025-08-09T14:43:34","slug":"switch-router-dhcp-nat","status":"publish","type":"post","link":"https:\/\/sky-peace.net\/certified\/switch-router-dhcp-nat\/","title":{"rendered":"\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u57fa\u672c\u3092\u56f3\u89e3\u3067\u6574\u7406\uff01L2\u30b9\u30a4\u30c3\u30c1\u30fb\u30eb\u30fc\u30bf\u30fc\u30fbDHCP\u30fbNAT\u306e\u5f79\u5272\u3068\u9055\u3044"},"content":{"rendered":"<p>\u300cL2\u30b9\u30a4\u30c3\u30c1\u3068\u30eb\u30fc\u30bf\u30fc\u3001\u4f55\u304c\u9055\u3046\u306e\uff1f\u300d\u300cDHCP\u3084NAT\u3063\u3066\u3001\u4e00\u4f53\u3044\u3064\u3001\u88cf\u3067\u4f55\u3092\u3057\u3066\u308b\u306e\uff1f\u300d<\/p>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u4e16\u754c\u306b\u306f\u3001\u305f\u304f\u3055\u3093\u306e\u5c02\u9580\u7528\u8a9e\u304c\u767b\u5834\u3057\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u304c\u5927\u5207\u306a\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u308b\u3068\u5206\u304b\u3063\u3066\u3044\u3066\u3082\u3001\u307e\u308b\u3067\u500b\u6027\u8c4a\u304b\u306a\u6848\u5185\u4eba\u305f\u3061\u304c\u4e00\u6589\u306b\u8a71\u3057\u304b\u3051\u3066\u304f\u308b\u3088\u3046\u3067\u3001\u982d\u304c\u6df7\u4e71\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3088\u306d\u3002\u305d\u306e\u304a\u60a9\u307f\u3001\u975e\u5e38\u306b\u3088\u304f\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u305d\u3093\u306a\u8907\u96d1\u306b\u898b\u3048\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u4e16\u754c\u3092\u3001\u4e00\u3064\u306e<strong>\u300c\u5de8\u5927\u306a\u30de\u30f3\u30b7\u30e7\u30f3\u300d<\/strong>\u306b\u4f8b\u3048\u3066\u63a2\u691c\u3057\u307e\u3059\u3002\u3042\u306a\u305f\u306e\u30d1\u30bd\u30b3\u30f3\u304c\u3001\u76ee\u7684\u306eWeb\u30b5\u30a4\u30c8\uff08\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u5916\u306b\u3042\u308b\u304a\u5e97\uff09\u306b\u305f\u3069\u308a\u7740\u304f\u307e\u3067\u306e\u9053\u306e\u308a\u3092\u4e00\u7dd2\u306b\u8ffd\u3044\u304b\u3051\u306a\u304c\u3089\u3001\u500b\u6027\u8c4a\u304b\u306a&#8221;\u6848\u5185\u4eba&#8221;\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3084\u30d7\u30ed\u30c8\u30b3\u30eb\uff09\u305f\u3061\u306e\u4ed5\u4e8b\u3076\u308a\u3092\u3001\u4e00\u3064\u305a\u3064\u89e3\u304d\u660e\u304b\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u306e\u5c4a\u3051\u5148\u3092\u793a\u3059<strong>\u300c\u4f4f\u6240\uff08IP\u30a2\u30c9\u30ec\u30b9\uff09\u300d<\/strong>\u3068\u3001\u6a5f\u5668\u56fa\u6709\u306e\u756a\u53f7\u3067\u3042\u308b<strong>\u300c\u90e8\u5c4b\u756a\u53f7\uff08MAC\u30a2\u30c9\u30ec\u30b9\uff09\u300d<\/strong>\u3002\u3053\u306e2\u3064\u306e\u60c5\u5831\u3092\u983c\u308a\u306b\u3001\u30c7\u30fc\u30bf\u304c\u3069\u306e\u3088\u3046\u306b\u5c4a\u3051\u3089\u308c\u3066\u3044\u304f\u306e\u304b\u3002\u305d\u306e\u904e\u7a0b\u3067\u3001\u6848\u5185\u4eba\u305f\u3061\u304c\u3069\u306e\u3088\u3046\u306b\u9023\u643a\u3057\u3001\u60c5\u5831\u3092\u6574\u7406\u30fb\u4e2d\u7d99\u3057\u3066\u3044\u308b\u306e\u304b\u3092\u56f3\u89e3\u3084\u8868\u3092\u4ea4\u3048\u306a\u304c\u3089\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u307f\u7d42\u3048\u308b\u9803\u306b\u306f\u3001\u300c\u3053\u306e\u6848\u5185\u4eba\u306f\u30de\u30f3\u30b7\u30e7\u30f3\u5185\u62c5\u5f53\uff01\u300d\u300c\u3053\u306e\u4eba\u306f\u5916\u306e\u4e16\u754c\u3068\u306e\u901a\u8a33\u62c5\u5f53\u306d\uff01\u300d\u3068\u3001\u5404\u7528\u8a9e\u306e\u5f79\u5272\u5206\u62c5\u304c\u30b9\u30c3\u30ad\u30ea\u6574\u7406\u3055\u308c\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u4ed5\u7d44\u307f\u304c\u76f4\u611f\u7684\u306b\u7406\u89e3\u3067\u304d\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<h2>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u300c\u4f4f\u6240\u300d\u3068\u300c\u90e8\u5c4b\u756a\u53f7\u300d\u2502IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u5f79\u5272\u5206\u62c5<\/h2>\n<p>\u307e\u305a\u3001\u3059\u3079\u3066\u306e\u901a\u4fe1\u306e\u571f\u53f0\u3068\u306a\u308b2\u3064\u306e\u300c\u8b58\u5225\u60c5\u5831\u300d\u3001<strong>IP\u30a2\u30c9\u30ec\u30b9<\/strong>\u3068<strong>MAC\u30a2\u30c9\u30ec\u30b9<\/strong>\u3092\u6574\u7406\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u306e2\u3064\u3092\u300c\u5de8\u5927\u306a\u30de\u30f3\u30b7\u30e7\u30f3\u3078\u306e\u8377\u7269\u914d\u9001\u300d\u306b\u4f8b\u3048\u308b\u3068\u3001\u305d\u306e\u5f79\u5272\u5206\u62c5\u304c\u9a5a\u304f\u307b\u3069\u30b9\u30c3\u30ad\u30ea\u7406\u89e3\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>MAC\u30a2\u30c9\u30ec\u30b9\uff1a\u5909\u308f\u3089\u306a\u3044\u300c\u90e8\u5c4b\u756a\u53f7\u300d<\/h3>\n<p>MAC\u30a2\u30c9\u30ec\u30b9\uff08\u30de\u30c3\u30af\u30a2\u30c9\u30ec\u30b9\uff09\u306f\u3001\u3072\u3068\u8a00\u3067\u3044\u3046\u3068<strong>\u300c\u6a5f\u5668\u56fa\u6709\u306e\u90e8\u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\u5177\u4f53\u4f8b\u3067\u7406\u89e3\uff01<\/h3>\n<p>\u3067\u306f\u3001\u306a\u305c\u300c\u4f4f\u6240\u300d\u3068\u300c\u90e8\u5c4b\u756a\u53f7\u300d\u306e\u4e21\u65b9\u304c\u5fc5\u8981\u306a\u306e\u3067\u3057\u3087\u3046\u304b\u3002<br \/>\u3042\u306a\u305f\u304c\u30ce\u30fc\u30c8\u30d1\u30bd\u30b3\u30f3\u3067\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30b7\u30e7\u30c3\u30d4\u30f3\u30b0\u3092\u3057\u305f\u5834\u9762\u3092\u60f3\u50cf\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ol>\n<li><strong>\u304a\u5e97\u304b\u3089\u8377\u7269\uff08\u30c7\u30fc\u30bf\uff09\u3092\u767a\u9001<\/strong><br \/>\u304a\u5e97\u306f\u307e\u305a\u3001\u3042\u306a\u305f\u306e<strong>IP\u30a2\u30c9\u30ec\u30b9\uff08\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u4f4f\u6240\uff09<\/strong>\u3092\u983c\u308a\u306b\u3001\u8377\u7269\u3092\u767a\u9001\u3057\u307e\u3059\u3002\u8377\u7269\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3068\u3044\u3046\u5de8\u5927\u306a\u9053\u8def\u7db2\u3092\u901a\u308a\u3001\u3042\u306a\u305f\u306e\u5951\u7d04\u3057\u3066\u3044\u308b\u30d7\u30ed\u30d0\u30a4\u30c0\uff08\u5730\u57df\u306e\u914d\u9001\u30bb\u30f3\u30bf\u30fc\uff09\u306a\u3069\u3092\u7d4c\u7531\u3057\u3066\u3001\u81ea\u5b85\u306e\u30eb\u30fc\u30bf\u30fc\uff08\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u5165\u308a\u53e3\u7ba1\u7406\u4eba\uff09\u307e\u3067\u5c4a\u3051\u3089\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u7ba1\u7406\u4eba\u3055\u3093\u304c\u90e8\u5c4b\u307e\u3067\u304a\u5c4a\u3051<\/strong><br \/>\u30de\u30f3\u30b7\u30e7\u30f3\u306b\u5230\u7740\u3057\u305f\u8377\u7269\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u30de\u30f3\u30b7\u30e7\u30f3\u306b\u306f\u3042\u306a\u305f\u306e\u30b9\u30de\u30db\u3084\u5bb6\u65cf\u306ePC\u306a\u3069\u3001\u305f\u304f\u3055\u3093\u306e\u90e8\u5c4b\uff08\u6a5f\u5668\uff09\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u7ba1\u7406\u4eba\uff08\u30eb\u30fc\u30bf\u30fc\uff09\u304c\u3001\u8377\u7269\u306e\u5b9b\u540d\u306b\u66f8\u304b\u308c\u305f<strong>MAC\u30a2\u30c9\u30ec\u30b9\uff08\u90e8\u5c4b\u756a\u53f7\uff09<\/strong>\u3092\u898b\u3066\u3001\u300c\u3053\u306e\u8377\u7269\u306f\u3001A\u3055\u3093\u306e\u30ce\u30fc\u30c8\u30d1\u30bd\u30b3\u30f3\u5b9b\u3060\u306a\u300d\u3068\u5224\u65ad\u3057\u3001\u6b63\u78ba\u306b\u3042\u306a\u305f\u306e\u30d1\u30bd\u30b3\u30f3\u307e\u3067\u5c4a\u3051\u3066\u304f\u308c\u308b\u306e\u3067\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<strong>IP\u30a2\u30c9\u30ec\u30b9\u306f\u300c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u5e83\u57df\u914d\u9001\u300d<\/strong>\u3001<strong>MAC\u30a2\u30c9\u30ec\u30b9\u306f\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u6700\u7d42\u7684\u306a\u500b\u5225\u914d\u9001\u300d<\/strong>\u3068\u3044\u3046\u3001\u660e\u78ba\u306a\u5f79\u5272\u5206\u62c5\u304c\u3042\u308b\u306e\u3067\u3059\u3002<\/p>\n<h4>\u3010IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u6bd4\u8f03\u8868\u3011<\/h4>\n<table class=\"wp-block-table is-style-stripes\">\n<thead>\n<tr>\n<th>\u9805\u76ee<\/th>\n<th>MAC\u30a2\u30c9\u30ec\u30b9<\/th>\n<th>IP\u30a2\u30c9\u30ec\u30b9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u5f79\u5272<\/strong><\/td>\n<td>\u540c\u4e00\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u6a5f\u5668\u3092\u8b58\u5225<\/td>\n<td>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u6a5f\u5668\uff08\u306e\u5834\u6240\uff09\u3092\u8b58\u5225<\/td>\n<\/tr>\n<tr>\n<td><strong>\u4f8b\u3048<\/strong><\/td>\n<td><strong>\u90e8\u5c4b\u756a\u53f7<\/strong>\uff08101\u53f7\u5ba4\uff09<\/td>\n<td><strong>\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u4f4f\u6240<\/strong>\uff08\u3007\u3007\u770c\u25b3\u25b3\u5e02&#8230;\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u52d5\u4f5c\u968e\u5c64<\/strong><\/td>\n<td>\u30ec\u30a4\u30e42\uff08\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\uff09<\/td>\n<td>\u30ec\u30a4\u30e43\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5909\u66f4\u306e\u53ef\u5426<\/strong><\/td>\n<td>\u57fa\u672c\u7684\u306b<strong>\u4e0d\u53ef<\/strong><\/td>\n<td><strong>\u53ef\u80fd<\/strong>\uff08\u63a5\u7d9a\u5148\u306b\u3088\u3063\u3066\u5909\u308f\u308b\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u8868\u8a18\u4f8b<\/strong><\/td>\n<td>00-1A-2B-3C-4D-5E<\/td>\n<td>192.168.1.10<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u30d5\u30ed\u30a2\u5185\u3092\u6848\u5185\u3059\u308bL2\u30b9\u30a4\u30c3\u30c1\u3068\u5916\u306e\u4e16\u754c\u306b\u7e4b\u3050\u30eb\u30fc\u30bf\u30fc\u2502\u5f79\u5272\u3068\u9055\u3044<\/h2>\n<p>IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u5f79\u5272\u304c\u5206\u304b\u3063\u305f\u3068\u3053\u308d\u3067\u3001\u3044\u3088\u3044\u3088\u4e3b\u5f79\u3067\u3042\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306e\u767b\u5834\u3067\u3059\u3002\u307e\u305a\u306f\u6700\u3082\u6df7\u540c\u3057\u3084\u3059\u3044\u300cL2\u30b9\u30a4\u30c3\u30c1\u300d\u3068\u300c\u30eb\u30fc\u30bf\u30fc\u300d\u3001\u3053\u306e2\u3064\u306e\u9055\u3044\u3092\u660e\u3089\u304b\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>L2\u30b9\u30a4\u30c3\u30c1\uff1a\u8ce2\u3044\u300c\u30d5\u30ed\u30a2\u5185\u7dda\u4fc2\u300d<\/h3>\n<p>L2\u30b9\u30a4\u30c3\u30c1\u306f\u3001\u3072\u3068\u8a00\u3067\u3044\u3046\u3068<strong>\u300c\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\uff08\uff1d\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u540c\u3058\u30d5\u30ed\u30a2\uff09\u3067\u306e\u901a\u4fe1\u3092\u52b9\u7387\u5316\u3059\u308b\u300d<\/strong>\u5c02\u9580\u5bb6\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u3042\u306a\u305f\u306e\u30d1\u30bd\u30b3\u30f3\uff08101\u53f7\u5ba4\uff09\u304b\u3089\u3001\u540c\u3058\u30d5\u30ed\u30a2\u306b\u3042\u308b\u30d7\u30ea\u30f3\u30bf\u30fc\uff08103\u53f7\u5ba4\uff09\u3078\u5370\u5237\u30c7\u30fc\u30bf\u3092\u9001\u308a\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u3001L2\u30b9\u30a4\u30c3\u30c1\u306f\u30c7\u30fc\u30bf\u306e\u5b9b\u5148\u3067\u3042\u308b\u30d7\u30ea\u30f3\u30bf\u30fc\u306e<strong>MAC\u30a2\u30c9\u30ec\u30b9\uff08\u90e8\u5c4b\u756a\u53f7\uff09<\/strong>\u3060\u3051\u3092\u898b\u3066\u3001\u300c\u306f\u3044\u3001103\u53f7\u5ba4\u306f\u3053\u3061\u3089\u3067\u3059\u306d\u300d\u3068\u3001\u76ee\u7684\u306e\u6a5f\u5668\u306b\u3060\u3051\u30c7\u30fc\u30bf\u3092\u6b63\u78ba\u306b\u5c4a\u3051\u307e\u3059\u3002<\/p>\n<blockquote class=\"wp-block-quote\">\n<p><strong>\u3010\u88dc\u8db3\uff1a\u30d6\u30ea\u30c3\u30b8\u3068\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6\u3011<\/strong><\/p>\n<ul>\n<li><strong>\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6<\/strong>\uff1a\u73fe\u5728\u3067\u306f\u3001\u307b\u307c\u300cL2\u30b9\u30a4\u30c3\u30c1\u300d\u3068\u540c\u3058\u610f\u5473\u3067\u4f7f\u308f\u308c\u308b\u8a00\u8449\u3067\u3059\u3002<\/li>\n<li><strong>\u30d6\u30ea\u30c3\u30b8<\/strong>\uff1aL2\u30b9\u30a4\u30c3\u30c1\u306e\u5148\u8f29\u306e\u3088\u3046\u306a\u5b58\u5728\u3067\u3001\u6a5f\u80fd\u306f\u57fa\u672c\u7684\u306b\u540c\u3058\u3067\u3059\u3002\u30dd\u30fc\u30c8\u6570\u304c\u5c11\u306a\u3044\u3082\u306e\u3092\u30d6\u30ea\u30c3\u30b8\u3001\u591a\u3044\u3082\u306e\u3092\u30b9\u30a4\u30c3\u30c1\u3068\u547c\u3093\u3067\u533a\u5225\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u3053\u308c\u3089\u306f\u3059\u3079\u3066<strong>\u300c\u30ec\u30a4\u30e42\u3067MAC\u30a2\u30c9\u30ec\u30b9\u3092\u898b\u3066\u3001\u8ce2\u304f\u901a\u4fe1\u3092\u4e2d\u7d99\u3059\u308b\u4ef2\u9593\u300d<\/strong>\u3068\u899a\u3048\u3066\u304a\u3051\u3070\u3001\u6df7\u4e71\u304c\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/blockquote>\n<h3>\u30eb\u30fc\u30bf\u30fc\uff1a\u983c\u308c\u308b\u300c\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u7ba1\u7406\u4eba\u300d<\/h3>\n<p>\u4e00\u65b9\u306e\u30eb\u30fc\u30bf\u30fc\u306f\u3001<strong>\u300c\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9593\uff08\uff1d\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u5185\u3068\u5916\uff09\u3092\u7e4b\u3050\u300d<\/strong>\u5c02\u9580\u5bb6\u3067\u3059\u3002<\/p>\n<p>\u4eca\u5ea6\u306f\u3001\u3042\u306a\u305f\u306e\u30d1\u30bd\u30b3\u30f3\uff08101\u53f7\u5ba4\uff09\u304b\u3089\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306b\u3042\u308b\u304a\u5e97\u306eWeb\u30b5\u30a4\u30c8\u3078\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u3053\u306e\u901a\u4fe1\u306f\u30de\u30f3\u30b7\u30e7\u30f3\u306e&#8221;\u5916&#8221;\u306b\u51fa\u3066\u3044\u304f\u305f\u3081\u3001\u30d5\u30ed\u30a2\u62c5\u5f53\u306eL2\u30b9\u30a4\u30c3\u30c1\u3060\u3051\u3067\u306f\u5bfe\u5fdc\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u306f\u307e\u305a\u300c\u7ba1\u7406\u4eba\u5ba4\u300d\u3067\u3042\u308b\u30eb\u30fc\u30bf\u30fc\u306b\u5c4a\u3051\u3089\u308c\u307e\u3059\u3002\u30eb\u30fc\u30bf\u30fc\u306f\u3001\u30c7\u30fc\u30bf\u306e\u5b9b\u5148\u3067\u3042\u308b\u304a\u5e97\u306e<strong>IP\u30a2\u30c9\u30ec\u30b9\uff08\u4f4f\u6240\uff09<\/strong>\u3092\u898b\u3066\u3001\u300c\u3053\u308c\u306f\u5916\u306e\u4e16\u754c\u5b9b\u3066\u306e\u8377\u7269\u3060\u306a\u300d\u3068\u5224\u65ad\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u4e16\u754c\u3078\u3068\u9001\u308a\u51fa\u3057\u3066\u304f\u308c\u307e\u3059\u3002\u9006\u306b\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304b\u3089\u3042\u306a\u305f\u5b9b\u306b\u5c4a\u3044\u305f\u8377\u7269\uff08Web\u30b5\u30a4\u30c8\u306e\u8868\u793a\u30c7\u30fc\u30bf\u306a\u3069\uff09\u3092\u53d7\u3051\u53d6\u308a\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u5185\u306e\u9069\u5207\u306a\u30d5\u30ed\u30a2\uff08L2\u30b9\u30a4\u30c3\u30c1\uff09\u3078\u3068\u6e21\u3057\u3066\u304f\u308c\u308b\u306e\u3082\u3001\u3053\u306e\u30eb\u30fc\u30bf\u30fc\u306e\u4ed5\u4e8b\u3067\u3059\u3002<\/p>\n<h3>\u7d50\u8ad6\uff1a\u898b\u308b\u300c\u60c5\u5831\u300d\u3068\u50cd\u304f\u300c\u5834\u6240\u300d\u304c\u5168\u304f\u9055\u3046\uff01<\/h3>\n<p>\u3053\u3053\u307e\u3067\u3092\u307e\u3068\u3081\u308b\u3068\u3001\u4e21\u8005\u306e\u6c7a\u5b9a\u7684\u306a\u9055\u3044\u306f<strong>\u300c\u5224\u65ad\u306b\u4f7f\u3046\u60c5\u5831\u300d<\/strong>\u3068<strong>\u300c\u50cd\u304f\u5834\u6240\u300d<\/strong>\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>L2\u30b9\u30a4\u30c3\u30c1<\/strong>\u306f\u3001<strong>MAC\u30a2\u30c9\u30ec\u30b9\uff08\u90e8\u5c4b\u756a\u53f7\uff09<\/strong>\u3092\u898b\u3066\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e<strong>\u5185\u90e8<\/strong>\u3067\u4ea4\u901a\u6574\u7406\u3092\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30eb\u30fc\u30bf\u30fc<\/strong>\u306f\u3001<strong>IP\u30a2\u30c9\u30ec\u30b9\uff08\u4f4f\u6240\uff09<\/strong>\u3092\u898b\u3066\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e<strong>\u5185\u3068\u5916\u306e\u5883\u754c\u7dda<\/strong>\u3067\u9580\u756a\u3092\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h4>\u3010L2\u30b9\u30a4\u30c3\u30c1\u3068\u30eb\u30fc\u30bf\u30fc\u306e\u6bd4\u8f03\u8868\u3011<\/h4>\n<table class=\"wp-block-table is-style-stripes\">\n<thead>\n<tr>\n<th>\u9805\u76ee<\/th>\n<th>L2\u30b9\u30a4\u30c3\u30c1\uff08\u30d6\u30ea\u30c3\u30b8\u306a\u3069\uff09<\/th>\n<th>\u30eb\u30fc\u30bf\u30fc<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u4e3b\u306a\u5f79\u5272<\/strong><\/td>\n<td><strong>\u540c\u4e00<\/strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u901a\u4fe1\u3092\u4e2d\u7d99<\/td>\n<td><strong>\u7570\u306a\u308b<\/strong>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9593\u306e\u901a\u4fe1\u3092\u4e2d\u7d99<\/td>\n<\/tr>\n<tr>\n<td><strong>\u4f8b\u3048<\/strong><\/td>\n<td>\u30d5\u30ed\u30a2\u5185\u7dda\u4fc2<\/td>\n<td>\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u7ba1\u7406\u4eba<\/td>\n<\/tr>\n<tr>\n<td><strong>\u52d5\u4f5c\u968e\u5c64<\/strong><\/td>\n<td>\u30ec\u30a4\u30e42\uff08\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\uff09<\/td>\n<td>\u30ec\u30a4\u30e43\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u5224\u65ad\u6750\u6599<\/strong><\/td>\n<td><strong>MAC\u30a2\u30c9\u30ec\u30b9<\/strong>\uff08\u90e8\u5c4b\u756a\u53f7\uff09<\/td>\n<td><strong>IP\u30a2\u30c9\u30ec\u30b9<\/strong>\uff08\u4f4f\u6240\uff09<\/td>\n<\/tr>\n<tr>\n<td><strong>\u50cd\u304f\u5834\u6240<\/strong><\/td>\n<td>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e<strong>\u5185\u90e8<\/strong><\/td>\n<td>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e<strong>\u5185\u5916\u306e\u5883\u754c<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>\u3010\u56f3\u89e3\u30a4\u30e1\u30fc\u30b8\u3011<br \/>\u3053\u3053\u306b\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u30d5\u30ed\u30a2\u5185\u3067L2\u30b9\u30a4\u30c3\u30c1\u304c\u52d5\u304d\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u7384\u95a2\u3067\u30eb\u30fc\u30bf\u30fc\u304c\u5185\u5916\u306e\u901a\u4fe1\u3092\u4e2d\u7d99\u3057\u3066\u3044\u308b\u69d8\u5b50\u306e\u30a4\u30e9\u30b9\u30c8\u304c\u5165\u308a\u307e\u3059\u3002<\/em><\/p>\n<h2>DHCP\u3068\u306f\uff1fIP\u30a2\u30c9\u30ec\u30b9\u3092\u81ea\u52d5\u3067\u5272\u308a\u632f\u308b\u300c\u53d7\u4ed8\u4fc2\u300d\u306e\u4ed5\u4e8b<\/h2>\n<p>\u3055\u3066\u3001\u3042\u306a\u305f\u306ePC\u3092Wi-Fi\u306b\u63a5\u7d9a\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u3068\u304d\u3001PC\u306f\u901a\u4fe1\u3059\u308b\u305f\u3081\u306b\u81ea\u5206\u81ea\u8eab\u306e\u300cIP\u30a2\u30c9\u30ec\u30b9\uff08\u4f4f\u6240\uff09\u300d\u3092\u5fc5\u8981\u3068\u3057\u307e\u3059\u304c\u3001\u4e00\u4f53\u3069\u3053\u304b\u3089\u53d6\u5f97\u3059\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u3053\u3053\u3067\u767b\u5834\u3059\u308b\u306e\u304c<strong>DHCP\uff08Dynamic Host Configuration Protocol\uff09<\/strong>\u3067\u3059\u3002<br \/>\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u4f8b\u3048\u3067\u3044\u3046\u306a\u3089\u3001<strong>\u300c\u65b0\u5165\u5c45\u8005\u306b\u7a7a\u3044\u3066\u3044\u308b\u90e8\u5c4b\u306e\u9375\uff08IP\u30a2\u30c9\u30ec\u30b9\uff09\u3092\u81ea\u52d5\u3067\u6e21\u3057\u3066\u304f\u308c\u308b\u53d7\u4ed8\u4fc2\u300d<\/strong>\u306e\u3088\u3046\u306a\u5b58\u5728\u3067\u3059\u3002<\/p>\n<h3>DHCP\u304c\u306a\u3044\u3068\u3001\u3069\u3046\u306a\u308b\uff1f<\/h3>\n<p>\u3082\u3057DHCP\u304c\u306a\u3051\u308c\u3070\u3001\u79c1\u305f\u3061\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3073\u306b\u3001\u624b\u52d5\u3067IP\u30a2\u30c9\u30ec\u30b9\u3092\u8a2d\u5b9a\u3057\u306a\u304f\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u3092\u300c\u9759\u7684\uff08\u30b9\u30bf\u30c6\u30a3\u30c3\u30af\uff09IP\u8a2d\u5b9a\u300d\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f\u300c\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u7ba1\u7406\u4eba\u3055\u3093\u304c\u304a\u3089\u305a\u3001\u65b0\u5165\u5c45\u8005\u304c\u81ea\u5206\u3067\u7a7a\u3044\u3066\u3044\u308b\u90e8\u5c4b\u3092\u63a2\u3057\u3066\u3001\u4ed6\u306e\u4eba\u3068\u90e8\u5c4b\u756a\u53f7\u304c\u88ab\u3089\u306a\u3044\u3088\u3046\u306b\u540d\u672d\u3092\u8cbc\u308b\u300d\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002\u975e\u5e38\u306b\u9762\u5012\u3067\u3059\u3057\u3001\u8a2d\u5b9a\u30df\u30b9\u3084\u300c\u4f4f\u6240\u306e\u91cd\u8907\u300d\u3068\u3044\u3063\u305f\u30c8\u30e9\u30d6\u30eb\u304c\u8d77\u3053\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>DHCP\u306e\u8ce2\u3044\u4ed5\u4e8b\u306e\u6d41\u308c\uff08\u5177\u4f53\u4f8b\uff09<\/h3>\n<p>DHCP\uff08\u53d7\u4ed8\u4fc2\uff09\u306f\u3001\u3053\u306e\u9762\u5012\u306a\u4f5c\u696d\u3092\u3059\u3079\u3066\u81ea\u52d5\u3067\u5f15\u304d\u53d7\u3051\u3066\u304f\u308c\u307e\u3059\u3002\u5bb6\u5ead\u3084\u30aa\u30d5\u30a3\u30b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u3001\u3053\u306eDHCP\u6a5f\u80fd\u306f<strong>\u4e00\u822c\u7684\u306b\u30eb\u30fc\u30bf\u30fc\uff08\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u7ba1\u7406\u4eba\uff09\u304c\u517c\u4efb\u3057\u3066\u3044\u307e\u3059<\/strong>\u3002<\/p>\n<p>PC\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3059\u308b\u3068\u3001\u88cf\u5074\u3067\u306f\u3053\u306e\u3088\u3046\u306a\u3084\u308a\u53d6\u308a\u304c\u77ac\u6642\u306b\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>PC\uff08\u65b0\u5165\u5c45\u8005\uff09<\/strong>\uff1a\u300c\u3059\u307f\u307e\u305b\u30fc\u3093\uff01\u8ab0\u304b\u79c1\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u304f\u3060\u3055\u30fc\u3044\uff01\u300d\uff08\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u901a\u4fe1 \u203b\u30d5\u30ed\u30a2\u5168\u4f53\u3078\u306e\u547c\u3073\u304b\u3051\uff09<\/li>\n<li><strong>DHCP\u30b5\u30fc\u30d0\u30fc\uff08\u53d7\u4ed8\u4fc2\u306e\u30eb\u30fc\u30bf\u30fc\uff09<\/strong>\uff1a\u300c\u306f\u3044\u3001\u79c1\u306b\u304a\u4efb\u305b\u304f\u3060\u3055\u3044\u3002\u3053\u3061\u3089\u306e\u300e192.168.1.10\u300f\u3068\u3044\u3046\u30a2\u30c9\u30ec\u30b9\u304c\u7a7a\u3044\u3066\u3044\u307e\u3059\u3088\u3002\u3044\u304b\u304c\u3067\u3059\u304b\uff1f\u300d<\/li>\n<li><strong>PC<\/strong>\uff1a\u300c\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3059\uff01\u3067\u306f\u3001\u305d\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u308f\u305b\u3066\u304f\u3060\u3055\u3044\uff01\u300d<\/li>\n<li><strong>DHCP\u30b5\u30fc\u30d0\u30fc<\/strong>\uff1a\u300c\u627f\u77e5\u3057\u307e\u3057\u305f\u3002\u3067\u306f\u3001\u3053\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u4e00\u5b9a\u6642\u9593\u3042\u306a\u305f\u306b\u8cb8\u3057\u51fa\u3057\u307e\u3059\u306d\u3002\u5927\u5bb6\u3055\u3093\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\uff09\u306e\u5834\u6240\u3084\u3001\u4f4f\u6240\u9332\uff08DNS\u30b5\u30fc\u30d0\u30fc\uff09\u306e\u5834\u6240\u3082\u4e00\u7dd2\u306b\u6559\u3048\u3066\u304a\u304d\u307e\u3059\u3002\u300d<\/li>\n<\/ol>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001DHCP\u306f\u5358\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u8cb8\u3057\u51fa\u3059\u3060\u3051\u3067\u306a\u304f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u306b\u5fc5\u8981\u306a\u60c5\u5831\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u3084DNS\u30b5\u30fc\u30d0\u30fc\u30a2\u30c9\u30ec\u30b9\u306a\u3069\uff09\u3082\u307e\u3068\u3081\u3066\u63d0\u4f9b\u3057\u3066\u304f\u308c\u308b\u3001\u975e\u5e38\u306b\u512a\u79c0\u306a\u53d7\u4ed8\u4fc2\u306a\u306e\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u52d5\u4f5c\u3059\u308b\u968e\u5c64<\/strong>\uff1a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\uff08\u30ec\u30a4\u30e47\uff09\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u304c\u3001<strong>\u30ec\u30a4\u30e43\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u6255\u3044\u51fa\u3059<\/strong>\u3001\u3068\u899a\u3048\u308b\u306e\u304c\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002<\/li>\n<\/ul>\n<p><em>\u3010\u56f3\u89e3\u30a4\u30e1\u30fc\u30b8\u3011<br \/>\u3053\u3053\u306b\u3001\u65b0\u3057\u304f\u63a5\u7d9a\u3057\u305fPC\u304c\u300cIP\u30a2\u30c9\u30ec\u30b9\u304f\u3060\u3055\u3044\uff01\u300d\u3068\u547c\u3073\u304b\u3051\u3001\u30eb\u30fc\u30bf\u30fc\uff08DHCP\u30b5\u30fc\u30d0\u30fc\uff09\u304c\u300c\u306f\u3044\u3001\u3069\u3046\u305e\uff01\u300d\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u6e21\u3057\u3066\u3044\u308b\u69d8\u5b50\u306e\u30a4\u30e9\u30b9\u30c8\u304c\u5165\u308a\u307e\u3059\u3002<\/em><\/p>\n<h2>ARP\u3068\u306f\uff1fIP\u30a2\u30c9\u30ec\u30b9\u304b\u3089MAC\u30a2\u30c9\u30ec\u30b9\u3092\u8abf\u3079\u308b\u300c\u4f4f\u6240\u30fb\u90e8\u5c4b\u756a\u53f7\u306e\u5bfe\u5fdc\u8868\u300d<\/h2>\n<p>\u7121\u4e8b\u306b\u81ea\u5206\u306eIP\u30a2\u30c9\u30ec\u30b9\uff08\u4f4f\u6240\uff09\u3092\u624b\u306b\u5165\u308c\u305f\u3042\u306a\u305f\u306ePC\uff08101\u53f7\u5ba4\uff09\u3002\u4eca\u5ea6\u306f\u3001\u540c\u3058\u30de\u30f3\u30b7\u30e7\u30f3\u306b\u4f4f\u3080\u53cb\u4ebaB\u3055\u3093\u306ePC\uff08104\u53f7\u5ba4\u3001IP\u30a2\u30c9\u30ec\u30b9\u306f <code>192.168.1.11<\/code>\uff09\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u9001\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u3053\u3067\u554f\u984c\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u30c7\u30fc\u30bf\u3092\u6700\u7d42\u7684\u306b\u5c4a\u3051\u308b\u306b\u306f\u3001B\u3055\u3093\u306ePC\u306e<strong>MAC\u30a2\u30c9\u30ec\u30b9\uff08\u90e8\u5c4b\u756a\u53f7\uff09<\/strong>\u304c\u5fc5\u8981\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u3042\u306a\u305f\u306ePC\u306fB\u3055\u3093\u306eIP\u30a2\u30c9\u30ec\u30b9\uff08\u4f4f\u6240\uff09\u3057\u304b\u77e5\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u306e\u300cIP\u30a2\u30c9\u30ec\u30b9\u306f\u5206\u304b\u308b\u3051\u3069\u3001MAC\u30a2\u30c9\u30ec\u30b9\u304c\u5206\u304b\u3089\u306a\u3044\uff01\u300d\u3068\u3044\u3046\u72b6\u6cc1\u3092\u89e3\u6c7a\u3057\u3066\u304f\u308c\u308b\u306e\u304c <strong>ARP\uff08Address Resolution Protocol\uff09<\/strong> \u3067\u3059\u3002ARP\u306f\u3001\u3072\u3068\u8a00\u3067\u3044\u3046\u3068<strong>\u300cIP\u30a2\u30c9\u30ec\u30b9\u3092\u624b\u304c\u304b\u308a\u306b\u3001\u76f8\u624b\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u554f\u3044\u5408\u308f\u305b\u308b\u300d<\/strong>\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n<h3>ARP\u306e\u4ed5\u7d44\u307f\uff1a\u30de\u30f3\u30b7\u30e7\u30f3\u5185\u3067\u306e\u30a2\u30ca\u30a6\u30f3\u30b9<\/h3>\n<p>ARP\u306e\u52d5\u304d\u306f\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u5185\u3067\u306e\u30a2\u30ca\u30a6\u30f3\u30b9\u306b\u4f8b\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<ol>\n<li><strong>PC-A\uff08\u3042\u306a\u305f\uff09<\/strong>\uff1a\u300c\u3059\u307f\u307e\u305b\u30fc\u3093\uff01IP\u30a2\u30c9\u30ec\u30b9\u304c <code>192.168.1.11<\/code> \u306e\u65b9\u3001\u3042\u306a\u305f\u306eMAC\u30a2\u30c9\u30ec\u30b9\uff08\u90e8\u5c4b\u756a\u53f7\uff09\u3092\u6559\u3048\u3066\u304f\u3060\u3055\u30fc\u3044\uff01\u300d\u3068\u3001<strong>\u30d5\u30ed\u30a2\u5168\u4f53\u306b\u547c\u3073\u304b\u3051\u307e\u3059\uff08\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\uff09<\/strong>\u3002<\/li>\n<li><strong>\u30d5\u30ed\u30a2\u306b\u3044\u308b\u4ed6\u306ePC<\/strong>\uff1a\u300c\uff08&#8230;\u81ea\u5206\u3058\u3083\u306a\u3044\u304b\u3089\u7121\u8996\u3057\u3088\u3046\uff09\u300d<\/li>\n<li><strong>PC-B\uff08\u53cb\u4eba\uff09<\/strong>\uff1a\u300c\u306f\u3044\uff01\u79c1\u304c <code>192.168.1.11<\/code> \u3067\u3059\u3002\u79c1\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306f <code>XX-XX-XX-XX-XX-XX<\/code> \u3067\u3059\u3088\uff01\u300d\u3068\u3001<strong>PC-A\u306b\u3060\u3051\u8fd4\u4e8b\u3092\u3057\u307e\u3059\uff08\u30e6\u30cb\u30ad\u30e3\u30b9\u30c8\uff09<\/strong>\u3002<\/li>\n<\/ol>\n<p>\u3053\u306e\u3084\u308a\u53d6\u308a\u306b\u3088\u3063\u3066\u3001\u3042\u306a\u305f\u306ePC\u306f\u53cb\u4ebaB\u3055\u3093\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u77e5\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u7121\u4e8b\u306b\u30c7\u30fc\u30bf\u3092\u5c4a\u3051\u308b\u6e96\u5099\u304c\u6574\u3046\u306e\u3067\u3059\u3002<\/p>\n<p>\u4e00\u5ea6\u554f\u3044\u5408\u308f\u305b\u305f\u7d50\u679c\u306f\u3001PC\u5185\u306e<strong>\u300cARP\u30c6\u30fc\u30d6\u30eb\u300d<\/strong>\u3068\u3044\u3046\u5834\u6240\u306b\u4e00\u6642\u7684\u306b\u8a18\u61b6\uff08\u30ad\u30e3\u30c3\u30b7\u30e5\uff09\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u4f4f\u6240\u3068\u90e8\u5c4b\u756a\u53f7\u306e\u5bfe\u5fdc\u8868\u300d\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3001\u6b21\u56de\u540c\u3058\u76f8\u624b\u306b\u901a\u4fe1\u3059\u308b\u969b\u306f\u3001\u308f\u3056\u308f\u3056\u30a2\u30ca\u30a6\u30f3\u30b9\u3057\u306a\u304f\u3066\u3082\u3001\u3053\u306e\u5bfe\u5fdc\u8868\u3092\u898b\u3066\u7d20\u65e9\u304f\u901a\u4fe1\u3092\u59cb\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u52d5\u4f5c\u3059\u308b\u968e\u5c64<\/strong>\uff1a\u30ec\u30a4\u30e43\u306e\u60c5\u5831\u3092\u5143\u306b\u30ec\u30a4\u30e42\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u89e3\u6c7a\u3059\u308b\u3001\u30ec\u30a4\u30e42.5\u306e\u3088\u3046\u306a\u5c11\u3057\u7279\u6b8a\u306a\u4f4d\u7f6e\u3065\u3051\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002<\/li>\n<\/ul>\n<blockquote class=\"wp-block-quote\">\n<p><strong>\u3010\u88dc\u8db3\uff1aRARP\u306b\u3064\u3044\u3066\u3011<\/strong><\/p>\n<p><strong>RARP\uff08Reverse ARP\uff09<\/strong> \u306f\u3001\u305d\u306e\u540d\u306e\u901a\u308aARP\u306e\u9006\u3067\u3001\u300c\u81ea\u5206\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306f\u5206\u304b\u308b\u3051\u3069\u3001IP\u30a2\u30c9\u30ec\u30b9\u304c\u5206\u304b\u3089\u306a\u3044\u300d\u3068\u3044\u3046\u6642\u306b\u4f7f\u3046\u3001\u5c11\u3057\u53e4\u3044\u6280\u8853\u3067\u3059\u3002\u73fe\u5728\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u306e\u5272\u308a\u5f53\u3066\u306f\u5148\u307b\u3069\u89e3\u8aac\u3057\u305f<strong>DHCP\u304c\u4e3b\u6d41<\/strong>\u306e\u305f\u3081\u3001RARP\u304c\u4f7f\u308f\u308c\u308b\u5834\u9762\u306f\u307b\u3068\u3093\u3069\u3042\u308a\u307e\u305b\u3093\u3002\u300cARP\u306e\u9006\u3067\u3001\u4eca\u306fDHCP\u304c\u4f7f\u308f\u308c\u308b\u300d\u3068\u899a\u3048\u3066\u304a\u3051\u3070\u5341\u5206\u3067\u3059\u3002<\/p>\n<\/blockquote>\n<p><em>\u3010\u56f3\u89e3\u30a4\u30e1\u30fc\u30b8\u3011<br \/>\u3053\u3053\u306b\u3001PC-A\u304c\u30d5\u30ed\u30a2\u5168\u4f53\u306b\u300c\u3053\u306eIP\u30a2\u30c9\u30ec\u30b9\u8ab0\uff1f\u300d\u3068\u53eb\u3073\u3001PC-B\u3060\u3051\u304c\u300c\u79c1\u3067\u3059\uff01\u300d\u3068\u624b\u3092\u6319\u3052\u3066\u7b54\u3048\u3066\u3044\u308b\u69d8\u5b50\u306e\u30a4\u30e9\u30b9\u30c8\u304c\u5165\u308a\u307e\u3059\u3002<\/em><\/p>\n<h2>NAT\u3068NAPT\uff08IP\u30de\u30b9\u30ab\u30ec\u30fc\u30c9\uff09\u2502\u5bb6\u5ead\u5185LAN\u3068\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u7e4b\u3050\u7ffb\u8a33\u6280\u8853<\/h2>\n<p>\u3055\u3042\u3001\u3042\u306a\u305f\u306ePC\u306f\u3064\u3044\u306b\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u5916\u3001\u3064\u307e\u308a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306eWeb\u30b5\u30a4\u30c8\u3078\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\u3053\u3053\u3067\u4e00\u3064\u3001\u5927\u304d\u306a\u58c1\u304c\u3042\u308a\u307e\u3059\u3002\u3042\u306a\u305f\u306ePC\u304c\u6301\u3064 <code>192.168.1.10<\/code> \u306e\u3088\u3046\u306aIP\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u5185\u3067\u3057\u304b\u901a\u7528\u3057\u306a\u3044<strong>\u300c\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\u300d<\/strong>\u3060\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u306f\u300c101\u53f7\u5ba4\u300d\u3068\u3044\u3046\u90e8\u5c4b\u756a\u53f7\u304c\u3001\u305d\u306e\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u4e2d\u3067\u3057\u304b\u610f\u5473\u3092\u306a\u3055\u306a\u3044\u306e\u3068\u540c\u3058\u3067\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u4e16\u754c\uff08\u90f5\u4fbf\u30b7\u30b9\u30c6\u30e0\uff09\u306f\u3001\u300c\u3007\u3007\u770c\u3007\u3007\u5e02&#8230;\u300d\u3068\u3044\u3046\u4e16\u754c\u3067\u552f\u4e00\u306e<strong>\u300c\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u300d<\/strong>\u3057\u304b\u898b\u3066\u304f\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>\u3067\u306f\u3001\u3069\u3046\u3084\u3063\u3066\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\u3057\u304b\u6301\u305f\u306a\u3044PC\u304c\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3068\u901a\u4fe1\u3059\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<br \/>\u305d\u306e\u8b0e\u3092\u89e3\u304f\u9375\u304c\u3001\u30eb\u30fc\u30bf\u30fc\uff08\u7ba1\u7406\u4eba\uff09\u304c\u6301\u3064<strong>NAT<\/strong>\u3068<strong>NAPT<\/strong>\u3068\u3044\u30462\u3064\u306e\u300c\u7ffb\u8a33\u300d\u6280\u8853\u3067\u3059\u3002<\/p>\n<h3>NAT\uff1aIP\u30a2\u30c9\u30ec\u30b9\u30921\u5bfe1\u3067\u7ffb\u8a33\u3059\u308b<\/h3>\n<p>NAT\uff08Network Address Translation\uff09\u306f\u3001\u305d\u306e\u540d\u306e\u901a\u308a<strong>\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u7ffb\u8a33\u3059\u308b\u300d<\/strong>\u6280\u8853\u3067\u3059\u3002<\/p>\n<p>PC\u304c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3078\u901a\u4fe1\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u7384\u95a2\u306b\u3044\u308b\u30eb\u30fc\u30bf\u30fc\uff08\u7ba1\u7406\u4eba\uff09\u304c\u3001\u9001\u4fe1\u5143\u3067\u3042\u308bPC\u306e<strong>\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9<\/strong>\u3092\u3001\u30eb\u30fc\u30bf\u30fc\u81ea\u8eab\u304c\u6301\u3064<strong>\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9<\/strong>\u306b\u66f8\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>PC \u2192 \u30eb\u30fc\u30bf\u30fc<\/strong>\uff1a\u300c\u9001\u4fe1\u5143\uff1a192.168.1.10\uff08\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\uff09\u300d<\/li>\n<li><strong>\u30eb\u30fc\u30bf\u30fc \u2192 \u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8<\/strong>\uff1a\u300c\u9001\u4fe1\u5143\uff1a(\u30eb\u30fc\u30bf\u30fc\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP)\u300d\u306b<strong>\u7ffb\u8a33\uff01<\/strong><\/li>\n<\/ul>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5074\u304b\u3089\u306f\u3001\u3042\u305f\u304b\u3082\u30eb\u30fc\u30bf\u30fc\u304c\u901a\u4fe1\u3057\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u5fdc\u7b54\u304c\u30eb\u30fc\u30bf\u30fc\u306b\u8fd4\u3063\u3066\u304f\u308b\u3068\u3001\u4eca\u5ea6\u306f\u5b9b\u5148\u3092PC\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\u306b\u66f8\u304d\u63db\u3048\u3066\u3001PC\u307e\u3067\u5c4a\u3051\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u3053\u306e\u57fa\u672c\u7684\u306aNAT\u306f\u30011\u3064\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\u30a2\u30c9\u30ec\u30b9\u30921\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u306b\u3057\u304b\u7ffb\u8a33\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u308c\u3067\u306f\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u5185\u306e\u305f\u304f\u3055\u3093\u306e\u4f4f\u6c11\uff08\u6a5f\u5668\uff09\u304c\u540c\u6642\u306b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u4f7f\u3044\u305f\u3044\u3001\u3068\u3044\u3046\u554f\u984c\u3092\u89e3\u6c7a\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h3>NAPT\uff08IP\u30de\u30b9\u30ab\u30ec\u30fc\u30c9\uff09\uff1a\u8907\u6570\u306e\u901a\u4fe1\u3092\u3055\u3070\u304f\u8ce2\u3044\u7ffb\u8a33\u6280\u8853<\/h3>\n<p>\u305d\u3053\u3067\u767b\u5834\u3059\u308b\u306e\u304c\u3001NAT\u3092\u3055\u3089\u306b\u5f37\u529b\u306b\u3057\u305f<strong>NAPT\uff08Network Address Port Translation\uff09<\/strong>\u3067\u3059\u3002\u73fe\u5728\u3001\u79c1\u305f\u3061\u304c\u5bb6\u5ead\u3084\u30aa\u30d5\u30a3\u30b9\u3067\u4f7f\u3063\u3066\u3044\u308b\u30eb\u30fc\u30bf\u30fc\u306e\u6a5f\u80fd\u306f\u3001\u53b3\u5bc6\u306b\u306f\u3053\u306eNAPT\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n<p>NAPT\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u306b\u52a0\u3048\u3066<strong>\u300c\u30dd\u30fc\u30c8\u756a\u53f7\u300d<\/strong>\u3068\u3044\u3046\u60c5\u5831\u3082\u4e00\u7dd2\u306b\u7ffb\u8a33\u3057\u307e\u3059\u3002<br \/>\u30dd\u30fc\u30c8\u756a\u53f7\u306f\u300c\u3069\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u901a\u4fe1\u304b\u300d\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306e\u756a\u53f7\u3067\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u4f8b\u3048\u3067\u3044\u3046\u306a\u3089<strong>\u300c\u7ba1\u7406\u4eba\u3055\u3093\u304c\u8377\u7269\u306b\u3064\u3051\u308b\u8377\u7269\u7ba1\u7406\u30bf\u30b0\uff08#10\u756a\u3001#11\u756a&#8230;\uff09\u300d<\/strong>\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n<ol>\n<li>PC-A\u3068PC-B\u304c\u3001\u540c\u6642\u306b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u307e\u3059\u3002<\/li>\n<li>\u30eb\u30fc\u30bf\u30fc\uff08\u7ba1\u7406\u4eba\uff09\u306f\u3001\u305d\u308c\u305e\u308c\u306e\u901a\u4fe1\u306e\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u3092\u3001\u81ea\u5206\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u306b\u66f8\u304d\u63db\u3048\u307e\u3059\u3002<\/li>\n<li>\u305d\u306e\u969b\u3001\u305d\u308c\u305e\u308c\u306e\u901a\u4fe1\u306b<strong>\u7570\u306a\u308b\u30dd\u30fc\u30c8\u756a\u53f7\uff08\u8377\u7269\u7ba1\u7406\u30bf\u30b0\uff09<\/strong>\u3092\u5272\u308a\u5f53\u3066\u307e\u3059\u3002<\/li>\n<li>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u304b\u3089\u5fdc\u7b54\u304c\u8fd4\u3063\u3066\u304f\u308b\u3068\u3001\u30eb\u30fc\u30bf\u30fc\u306f\u623b\u3063\u3066\u304d\u305f\u8377\u7269\u306e<strong>\u30dd\u30fc\u30c8\u756a\u53f7\uff08\u8377\u7269\u7ba1\u7406\u30bf\u30b0\uff09<\/strong>\u3092\u898b\u3066\u3001\u300c\u3042\u3001\u3053\u306e#10\u756a\u306e\u8377\u7269\u306fPC-A\u3055\u3093\u5b9b\u3060\u306a\u300d\u300c#11\u756a\u306fPC-B\u3055\u3093\u5b9b\u3060\u300d\u3068\u6b63\u78ba\u306b\u5224\u65ad\u3057\u3001\u305d\u308c\u305e\u308c\u306ePC\u306b\u5c4a\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308a\u3001<strong>\u305f\u3063\u305f1\u3064\u306e\u30b0\u30ed\u30fc\u30d0\u30ebIP\u30a2\u30c9\u30ec\u30b9\u3092\u3001\u30de\u30f3\u30b7\u30e7\u30f3\u5185\u306e\u8907\u6570\u306ePC\u3067\u5171\u6709\u3067\u304d\u308b<\/strong>\u306e\u3067\u3059\u3002<br \/>\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u4f4f\u6c11\u307f\u3093\u306a\u304c\u3001\u7ba1\u7406\u4eba\u3055\u3093\uff08\u30eb\u30fc\u30bf\u30fc\uff09\u3068\u3044\u3046\u4e00\u3064\u306e\u7a93\u53e3\u3092\u901a\u3057\u3066\u901a\u4fe1\u3059\u308b\u305f\u3081\u3001\u5916\u306e\u4e16\u754c\u304b\u3089\u306f\u4f4f\u6c11\u4e00\u4eba\u3072\u3068\u308a\u306e\u9854\u304c\u898b\u3048\u307e\u305b\u3093\u3002\u3053\u306e\u69d8\u5b50\u304b\u3089\u3001NAPT\u306f<strong>\u300cIP\u30de\u30b9\u30ab\u30ec\u30fc\u30c9\uff08\u4eee\u9762\u821e\u8e0f\u4f1a\uff09\u300d<\/strong>\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<h4>\u3010NAT\u3068NAPT\u306e\u6bd4\u8f03\u8868\u3011<\/h4>\n<table class=\"wp-block-table 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