{"id":5418,"date":"2025-07-29T00:50:13","date_gmt":"2025-07-28T15:50:13","guid":{"rendered":"https:\/\/sky-peace.net\/?p=5418"},"modified":"2025-07-29T00:50:13","modified_gmt":"2025-07-28T15:50:13","slug":"not-2-subnet","status":"publish","type":"post","link":"https:\/\/sky-peace.net\/certified\/not-2-subnet\/","title":{"rendered":"2\u9032\u6570\u306a\u3057\u3067\u89e3\u3051\u308b\uff01\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u76f4\u611f\u30eb\u30fc\u30eb"},"content":{"rendered":"

\nIP\u30a2\u30c9\u30ec\u30b9\u3068\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7cfb\u306e\u8a66\u9a13\u306b\u304a\u3051\u308b\u983b\u51fa\u30c8\u30d4\u30c3\u30af\u3067\u3059\u3002\u7279\u306b\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b\u300d\u554f\u984c\u306f\u3001\u7406\u5c48\u3067\u306f\u7406\u89e3\u3057\u3066\u3044\u3066\u3082\u5b9f\u969b\u306b\u624b\u3092\u52d5\u304b\u3059\u3068\u3064\u307e\u305a\u304f\u4eba\u3082\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\uff1f\u3053\u306e\u8a18\u4e8b\u3067\u306f\u30012\u9032\u6570\u3084\u8ad6\u7406\u7a4d\uff08AND\u6f14\u7b97\uff09\u3068\u3044\u3063\u305f\u8a08\u7b97\u3092\u4f7f\u308f\u305a\u3001\u300c\u6570\u5b57\u306e\u30d1\u30bf\u30fc\u30f3\u300d\u3060\u3051\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u3068\u30db\u30b9\u30c8\u90e8\u3092\u898b\u5206\u3051\u308b\u76f4\u611f\u7684\u306a\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u6697\u8a18\u306b\u983c\u308a\u3059\u304e\u305a\u3001\u611f\u899a\u3067\u89e3\u3051\u308b\u3088\u3046\u306b\u306a\u308c\u3070\u3001\u8a66\u9a13\u672c\u756a\u3067\u3082\u5927\u304d\u306a\u6b66\u5668\u306b\u306a\u308a\u307e\u3059\u3002\n<\/p>\n

\u2460 \u57fa\u790e\u77e5\u8b58\u3068\u308f\u304b\u308a\u3084\u3059\u3044\u89e3\u8aac<\/h2>\n

\n\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u306e\u3069\u306e\u90e8\u5206\u304c\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u300d\u3067\u3001\u3069\u306e\u90e8\u5206\u304c\u300c\u30db\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u300d\u306a\u306e\u304b\u3092\u533a\u5225\u3059\u308b\u305f\u3081\u306e\u4ed5\u7d44\u307f\u3067\u3059\u3002\u672c\u6765\u3067\u3042\u308c\u3070IP\u30a2\u30c9\u30ec\u30b9\u3068\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u30922\u9032\u6570\u306b\u5909\u63db\u3057\u3001AND\u6f14\u7b97\uff08\u8ad6\u7406\u7a4d\uff09\u3092\u3068\u3063\u3066\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u5c0e\u304d\u307e\u3059\u304c\u3001\u3053\u3053\u3067\u306f2\u9032\u6570\u3092\u4f7f\u308f\u305a\u76f4\u611f\u7684\u306b\u7406\u89e3\u3059\u308b\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n<\/p>\n

\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306e\u6570\u5b57\u304c\u610f\u5473\u3059\u308b\u3053\u3068<\/h3>\n

\n\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306f\u30014\u3064\u306e\u30aa\u30af\u30c6\u30c3\u30c8\uff088\u30d3\u30c3\u30c8\u3054\u3068\uff09\u3067\u69cb\u6210\u3055\u308c\u3066\u304a\u308a\u3001\u305d\u308c\u305e\u308c\u304c 0\u301c255<\/code> \u306e\u6570\u5b57\u3067\u8868\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u6570\u5b57\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u3068\u30db\u30b9\u30c8\u90e8\u3092\u5206\u3051\u308b\u300c\u5883\u754c\u7dda\u300d\u306b\u306a\u308a\u307e\u3059\u3002\n<\/p>\n\n\n\n\n\n\n\n
\u5024<\/th>\n\u610f\u5473<\/th>\n<\/tr>\n<\/thead>\n
255<\/td>\n\u305d\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u5168\u4f53\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8<\/td>\n<\/tr>\n
0<\/td>\n\u305d\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u5168\u4f53\u304c\u30db\u30b9\u30c8\u90e8<\/td>\n<\/tr>\n
128\u301c254<\/td>\n\u30aa\u30af\u30c6\u30c3\u30c8\u5185\u306b\u5883\u754c\u304c\u3042\u308b\uff08\u5f8c\u8ff0\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n\u305f\u3068\u3048\u3070\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af 255.255.255.0<\/code> \u306e\u5834\u5408\u3001\u6700\u521d\u306e3\u3064\u306e\u30aa\u30af\u30c6\u30c3\u30c8\uff08192.168.1\u306a\u3069\uff09\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u3001\u6700\u5f8c\u306e1\u30aa\u30af\u30c6\u30c3\u30c8\uff080\u301c255\u306e\u7bc4\u56f2\uff09\u304c\u30db\u30b9\u30c8\u90e8\u306b\u306a\u308a\u307e\u3059\u3002\n<\/p>\n

\u6570\u5b57\u306e\u30b3\u30d4\u30fc\u539f\u5247\uff1a\u300c255\u306f\u30b3\u30d4\u30fc\u30010\u306f\u30bc\u30ed\u300d<\/h3>\n

\n\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u5c0e\u304f\u3068\u304d\u306e\u76f4\u611f\u7684\u30eb\u30fc\u30eb\u306f\u3053\u3046\u3067\u3059\uff1a\n<\/p>\n

    \n
  • 255 \u306e\u4f4d\u7f6e\u306e\u6570\u5b57\u306f\u305d\u306e\u307e\u307e\u30b3\u30d4\u30fc<\/strong><\/li>\n
  • 0 \u306e\u4f4d\u7f6e\u306e\u6570\u5b57\u306f 0 \u306b\u5909\u63db<\/strong><\/li>\n
  • \u305d\u308c\u4ee5\u5916\u306e\u5024\uff08128\u301c254\uff09\u306f\u201c\u30ab\u30c3\u30c8\u201d\u306e\u5883\u754c\uff1a\u6b21\u7ae0\u3067\u8a73\u89e3<\/strong><\/li>\n<\/ul>\n

    \u4f8b\uff09<\/p>\n

      \n
    • IP\u30a2\u30c9\u30ec\u30b9\uff1a192.168.10.25<\/code><\/li>\n
    • \u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\uff1a255.255.255.0<\/code><\/li>\n
    • \u2192 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306f 192.168.10.0<\/code><\/li>\n<\/ul>\n

      \n\u3053\u306e\u3088\u3046\u306b\u3001255 \u306f\u300c\u305d\u306e\u307e\u307e\u4f7f\u3046\u300d\u30010 \u306f\u300c\u5168\u90e8\u30bc\u30ed\u306b\u3059\u308b\u300d\u3068\u899a\u3048\u308c\u3070\u3001\u8ad6\u7406\u7a4d\u306f\u4e0d\u8981\u3067\u3059\u3002\n<\/p>\n

      \u2461 \u904e\u53bb\u306e\u51fa\u984c\u4f8b\u3068\u89e3\u8aac<\/h2>\n

      \n\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306b\u95a2\u3059\u308b\u554f\u984c\u306f\u3001\u5fdc\u7528\u60c5\u5831\u6280\u8853\u8005\u8a66\u9a13\u3092\u306f\u3058\u3081\u3001\u591a\u304f\u306e\u9ad8\u5ea6\u8a66\u9a13\u3067\u7e70\u308a\u8fd4\u3057\u51fa\u984c\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u5b9f\u969b\u306eIPA\u904e\u53bb\u554f\u3092\u3082\u3068\u306b\u3001\u3069\u306e\u3088\u3046\u306b\u51fa\u984c\u3055\u308c\u3001\u3069\u3046\u89e3\u3051\u3070\u3088\u3044\u304b\u3092\u5177\u4f53\u7684\u306b\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\n<\/p>\n

      \u25a0 \u51fa\u984c\u4f8b1\uff1a\u4ee4\u548c4\u5e74\u6625 \u5348\u524d \u554f17<\/h3>\n

      \nIP\u30a2\u30c9\u30ec\u30b9\uff1a192.168.10.77\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\uff1a255.255.255.0<\/code>
      \n\u2192 \u6700\u5f8c\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u3060\u3051\u304c\u30db\u30b9\u30c8\u90e8\u306a\u306e\u3067\u3001\u300c77\u300d\u3092\u300c0\u300d\u306b\u623b\u305b\u3070OK\u3002
      \n\u7b54\u3048\uff1a192.168.10.0<\/strong>\n<\/p>\n

      \u25a0 \u51fa\u984c\u4f8b2\uff1a\u4ee4\u548c3\u5e74\u79cb \u5348\u524d \u554f18<\/h3>\n

      \nIP\u30a2\u30c9\u30ec\u30b9\uff1a10.2.34.145\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\uff1a255.255.240.0<\/code>
      \n\u2192 \u7b2c3\u30aa\u30af\u30c6\u30c3\u30c8\u300c34\u300d\u306b\u6ce8\u76ee\u3002\u300c240\u300d\u306f2\u9032\u6570\u3067\u300c11110000\u300d\u2192 \u4e0a\u4f4d4\u30d3\u30c3\u30c8\uff1d2^4\uff1d16\u5358\u4f4d\u3067\u5206\u5272\u3055\u308c\u308b\u3002
      \n\u2192 34\u306f\u300c32\u301c47\u300d\u306b\u5c5e\u3059\u308b \u2192 \u958b\u59cb\u5024\u300c32\u300d\u4f7f\u7528 \u2192
      \n\u7b54\u3048\uff1a10.2.32.0<\/strong>\n<\/p>\n

      \u25a0 \u51fa\u984c\u4f8b3\uff1a\u4ee4\u548c2\u5e74\u6625 \u5348\u524d \u554f19\uff08CIDR\u5f62\u5f0f\uff09<\/h3>\n

      \nIP\u30a2\u30c9\u30ec\u30b9\uff1a192.168.1.77\/26<\/code>
      \n\u2192 \u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306f255.255.255.192\u3001\u3064\u307e\u308a\u300c64\u5358\u4f4d\u300d\u3067\u7bc4\u56f2\u304c\u533a\u5207\u3089\u308c\u3066\u3044\u308b\u300277\u306f\u300c64\u301c127\u300d\u306b\u542b\u307e\u308c\u308b\u306e\u3067\u3001
      \n\u7b54\u3048\uff1a192.168.1.64<\/strong>\n<\/p>\n

      \n\u3053\u306e\u3088\u3046\u306b\u3001\u51fa\u984c\u5f62\u5f0f\u306f\u7570\u306a\u3063\u3066\u3082\u300c\u7bc4\u56f2\u306e\u533a\u5207\u308a\u300d\u306b\u6ce8\u76ee\u3059\u308c\u3070\u3001\u4e00\u8cab\u3057\u305f\u76f4\u611f\u30eb\u30fc\u30eb\u3067\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002\n<\/p>\n

      \u2462 \u3064\u307e\u305a\u304d\u30dd\u30a4\u30f3\u30c8\u5fb9\u5e95\u89e3\u8aac<\/h2>\n

      \n\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u7b97\u51fa\u306f\u3001\u30eb\u30fc\u30eb\u3055\u3048\u899a\u3048\u308c\u3070\u5358\u7d14\u3067\u3059\u304c\u3001\u51fa\u984c\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u53d7\u9a13\u8005\u304c\u6df7\u4e71\u3057\u3084\u3059\u3044\u30dd\u30a4\u30f3\u30c8\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u300c\u3088\u304f\u3042\u308b\u3064\u307e\u305a\u304d\u3069\u3053\u308d\u300d\u30923\u3064\u306b\u7d5e\u3063\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\n<\/p>\n

      \u2776 \u4e2d\u9593\u5024\u30de\u30b9\u30af\uff08\u4f8b\uff1a240\u3001248\u3001224\uff09\u3067\u306e\u6238\u60d1\u3044<\/h3>\n

      \n255\u30840\u306e\u3088\u3046\u306b\u6975\u7aef\u306a\u30de\u30b9\u30af\u306f\u76f4\u611f\u7684\u306b\u6271\u3044\u3084\u3059\u3044\u3067\u3059\u304c\u3001240\u3084248\u306a\u3069\u306e\u4e2d\u9593\u5024\u304c\u51fa\u308b\u3068\u3001\u6238\u60d1\u3046\u4eba\u304c\u591a\u304f\u306a\u308a\u307e\u3059\u3002
      \n\u305d\u306e\u7406\u7531\u306f\u3001\u300c\u4f55\u5358\u4f4d\u3067\u533a\u5207\u308c\u3070\u3088\u3044\u304b\u300d\u304c\u30a4\u30e1\u30fc\u30b8\u3057\u3065\u3089\u3044\u305f\u3081\u3067\u3059\u3002\n<\/p>\n\n\n\n\n\n
      \u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af<\/th>\n2\u9032\u6570<\/th>\n\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d3\u30c3\u30c8\u6570<\/th>\n\u533a\u5207\u308a\u5358\u4f4d\uff082^\u6b8b\u308a\u30d3\u30c3\u30c8\uff09<\/th>\n<\/tr>\n
      240<\/td>\n11110000<\/td>\n4\u30d3\u30c3\u30c8<\/td>\n16\uff08256\u00f716\uff09<\/td>\n<\/tr>\n
      248<\/td>\n11111000<\/td>\n5\u30d3\u30c3\u30c8<\/td>\n8\uff08256\u00f78\uff09<\/td>\n<\/tr>\n
      252<\/td>\n11111100<\/td>\n6\u30d3\u30c3\u30c8<\/td>\n4\uff08256\u00f74\uff09<\/td>\n<\/tr>\n<\/table>\n

      \u2777 \u30aa\u30af\u30c6\u30c3\u30c8\u5883\u754c\u3092\u307e\u305f\u3050\u30b1\u30fc\u30b9<\/h3>\n

      \n\u4f8b\uff1a255.255.255.192<\/code> \u306e\u3088\u3046\u306b\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u304c3\u30aa\u30af\u30c6\u30c3\u30c8\uff0b\u03b1\u306b\u307e\u305f\u304c\u308b\u5834\u5408\u3002
      \nIP\u30a2\u30c9\u30ec\u30b9\uff1a192.168.10.197 \u2192 4\u756a\u76ee\u304c\u300c192\u301c255\u300d\u306e\u7bc4\u56f2\u306b\u5c5e\u3059\u308b \u2192 \u5148\u982d\u5024\u300c192\u300d\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3002\n<\/p>\n

      \u2778 \u30db\u30b9\u30c8\u90e8\u306e\u300c0\u623b\u3057\u300d\u3092\u5fd8\u308c\u308b<\/h3>\n

      \n\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306e0\u90e8\u5206\u3067\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u3092\u305d\u306e\u307e\u307e\u4f7f\u3063\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u5fc5\u305a\u300c0\u300d\u306b\u623b\u3057\u307e\u3059\u3002
      \n\u4f8b\uff1a255.255.0.0 \u306b\u304a\u3044\u3066 10.20.99.55 \u2192 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\uff1a10.20.0.0<\/strong>\n<\/p>\n

      \n\u3053\u308c\u3089\u306e\u3064\u307e\u305a\u304d\u3092\u907f\u3051\u308b\u306b\u306f\u3001\u300c255\u30b3\u30d4\u30fc\u30fb0\u306f\u30bc\u30ed\u30fb\u4e2d\u9593\u306f\u533a\u5207\u308a\u5358\u4f4d\u3067\u5207\u308b\u300d\u3068\u3044\u3046\u30eb\u30fc\u30eb\u3092\u4e00\u8cab\u3057\u3066\u4f7f\u3046\u3053\u3068\u304c\u30ab\u30ae\u3067\u3059\u3002\n<\/p>\n

      \u2463 \u4eca\u5f8c\u306e\u51fa\u984c\u4e88\u60f3\u3068\u4f8b\u984c\uff08CIDR\u7de8\u30fb\u4e01\u5be7\u89e3\u8aac\u3064\u304d\uff09<\/h2>\n

      \n\u8fd1\u5e74\u306e\u5fdc\u7528\u60c5\u5831\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u30da\u30b7\u30e3\u30ea\u30b9\u30c8\u8a66\u9a13\u3067\u306f\u3001\u5358\u7d14\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u7b97\u51fa\u306b\u3068\u3069\u307e\u3089\u305a\u3001CIDR\uff08Classless Inter-Domain Routing\uff09\u5f62\u5f0f<\/strong>\u3092\u6d3b\u7528\u3057\u305f\u554f\u984c\u304c\u983b\u7e41\u306b\u51fa\u984c\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306fCIDR\u306e\u672c\u8cea\u3092\u30b9\u30c6\u30c3\u30d7\u89e3\u8aac\u3057\u306a\u304c\u3089\u3001\u4f8b\u984c\u306b\u5f37\u304f\u306a\u308b\u76f4\u611f\u7684\u306a\u7406\u89e3\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\n<\/p>\n

      🧠 CIDR\uff08\/26\u306a\u3069\uff09\u3068\u306f\u4f55\u304b\uff1f<\/h3>\n

      \nCIDR\u8868\u8a18 \/26<\/code> \u306f\u3001\u300cIP\u30a2\u30c9\u30ec\u30b9\u5168\u4f53\u306e\u3046\u3061\u3001\u5de6\u304b\u308926\u30d3\u30c3\u30c8\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u3067\u3042\u308b\u300d\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002\n<\/p>\n

      \nIP\u30a2\u30c9\u30ec\u30b9\u306f 8\u30d3\u30c3\u30c8 \u00d7 4\u30aa\u30af\u30c6\u30c3\u30c8 = 32\u30d3\u30c3\u30c8\u69cb\u6210\u3002\/26 \u306e\u5834\u5408\u30011\u301c3\u30aa\u30af\u30c6\u30c3\u30c8\u306724\u30d3\u30c3\u30c8\u3001\u6b8b\u308a\u306e2\u30d3\u30c3\u30c8\u306f4\u756a\u76ee\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u5185\u306b\u542b\u307e\u308c\u307e\u3059\uff1a\n<\/p>\n

      \n[8] . [8] . [8] . [2|6] \u2190 \u5408\u8a0826\u30d3\u30c3\u30c8\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\n<\/pre>\n
      🎯 \u306a\u305c\u300c256 \u00f7 4 = 64\u3054\u3068\u300d\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u5206\u304b\u308c\u308b\u306e\u304b\uff1f<\/h3>\n
      \n4\u756a\u76ee\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u306f 0\u301c255 \uff1d256\u901a\u308a\u3042\u308a\u307e\u3059\u3002
      \nCIDR \/26 \u306e\u5834\u5408\u3001\u4e0a\u4f4d2\u30d3\u30c3\u30c8\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u306b\u4f7f\u3044\u307e\u3059 \u2192 2\u30d3\u30c3\u30c8\uff1d4\u901a\u308a\uff0800, 01, 10, 11\uff09\u3067\u3059\u3002\n<\/p>\n
      \n\u3053\u306e4\u901a\u308a\u3067256\u901a\u308a\u3092\u5206\u3051\u308b\u306b\u306f\uff1a\n<\/p>\n
      \n256 \u00f7 4 = 64\n<\/pre>\n
      \n\u2192 \u3064\u307e\u308a\u3001\u300c64\u5358\u4f4d\u300d\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u533a\u5207\u3089\u308c\u308b\u3001\u3068\u3044\u3046\u610f\u5473\u306b\u306a\u308a\u307e\u3059\u3002\n<\/p>\n
      📊 \u5206\u5272\u30a4\u30e1\u30fc\u30b8<\/h3>\n\n\n\n\n\n\n
      \u4e0a\u4f4d2\u30d3\u30c3\u30c8<\/th>\n\u5024\u306e\u7bc4\u56f2<\/th>\n\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9<\/th>\n<\/tr>\n
      00<\/td>\n0\u301c63<\/td>\n192.168.1.0<\/td>\n<\/tr>\n
      01<\/td>\n64\u301c127<\/td>\n192.168.1.64<\/td>\n<\/tr>\n
      10<\/td>\n128\u301c191<\/td>\n192.168.1.128<\/td>\n<\/tr>\n
      11<\/td>\n192\u301c255<\/td>\n192.168.1.192<\/td>\n<\/tr>\n<\/table>\n
      📘 \u4e88\u60f3\u554f\u984c\u3068\u89e3\u8aac<\/h3>\n
      \n\u554f\u984c\uff1a<\/strong> IP\u30a2\u30c9\u30ec\u30b9 192.168.50.77\/26<\/code> \u306b\u304a\u3044\u3066\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306f\uff1f\n<\/p>\n
        \n
      1. \/26 \u2192 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u306f26\u30d3\u30c3\u30c8 \u2192 \u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\uff1a255.255.255.192<\/li>\n
      2. 4\u756a\u76ee\u306e\u5024\u300c77\u300d\u306f 64\u301c127 \u306e\u7bc4\u56f2 \u2192 \u5148\u982d\u5024\u300c64\u300d\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9<\/li>\n<\/ol>\n
        \n\u7b54\u3048\uff1a192.168.50.64<\/strong>\n<\/p>\n
        \n\u3053\u306e\u3088\u3046\u306bCIDR\u306e\u300c\/\u6570\u5b57\u300d\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d3\u30c3\u30c8\u6570\u2192\u5206\u5272\u6570\u2192\u533a\u5207\u308a\u5e45\u2192\u7bc4\u56f2\u3068\u5bfe\u5fdc\u3057\u3066\u304a\u308a\u3001\u9806\u3092\u8ffd\u3063\u3066\u7406\u89e3\u3059\u308c\u3070\u76f4\u611f\u7684\u306b\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002\n<\/p>\n
        \u2464 \u6d3e\u751f\u8a9e\u30fb\u95a2\u9023\u30ad\u30fc\u30ef\u30fc\u30c9<\/h2>\n
          \n
        • CIDR\uff08Classless Inter-Domain Routing\uff09<\/strong>\uff1aIP\u30a2\u30c9\u30ec\u30b9\u3092\u67d4\u8edf\u306b\u5206\u5272\u30fb\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u8a18\u6cd5\u3002\u4f8b\uff1a192.168.0.0\/24<\/li>\n
        • VLSM\uff08\u53ef\u5909\u9577\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\uff09<\/strong>\uff1a\u7570\u306a\u308b\u30b5\u30a4\u30ba\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u6df7\u5728\u3055\u305b\u308b\u8a2d\u8a08\u624b\u6cd5<\/li>\n
        • \u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u9577<\/strong>\uff1aCIDR\u8868\u8a18\u306e\u300c\/26\u300d\u306a\u3069\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d3\u30c3\u30c8\u6570\u3092\u6307\u3059<\/li>\n
        • \u30b5\u30d6\u30cd\u30c3\u30c8<\/strong>\uff1a1\u3064\u306eIP\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u5206\u5272\u3057\u305f\u5c0f\u3055\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5358\u4f4d<\/li>\n
        • \u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9<\/strong>\uff1a\u305d\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u5185\u306e\u5168\u30db\u30b9\u30c8\u306b\u540c\u6642\u9001\u4fe1\u3059\u308b\u305f\u3081\u306e\u30a2\u30c9\u30ec\u30b9<\/li>\n
        • \u30db\u30b9\u30c8\u90e8\u306e\u6700\u5927\u6570<\/strong>\uff1a2^n \u2212 2\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff06\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u9664\u5916\uff09<\/li>\n<\/ul>\n
          \n\u3053\u308c\u3089\u306e\u7528\u8a9e\u3082\u8a66\u9a13\u3067\u306f\u983b\u51fa\u306a\u306e\u3067\u3001\u5408\u308f\u305b\u3066\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\n<\/p>\n
          \u2465 \u307e\u3068\u3081<\/h2>\n
          \nIP\u30a2\u30c9\u30ec\u30b9\u3068\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306e\u7406\u89e3\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a66\u9a13\u5bfe\u7b56\u306e\u57fa\u790e\u4e2d\u306e\u57fa\u790e\u3067\u3059\u3002\u4eca\u56de\u7d39\u4ecb\u3057\u305f\u300c255\u306f\u30b3\u30d4\u30fc\u30010\u306f\u30bc\u30ed\u3001\u4e2d\u9593\u306f\u7bc4\u56f2\u3067\u898b\u308b\u300d\u3068\u3044\u3046\u30eb\u30fc\u30eb\u3092\u4f7f\u3048\u3070\u30012\u9032\u6570\u3084AND\u6f14\u7b97\u3092\u4f7f\u308f\u306a\u304f\u3066\u3082\u3001\u76f4\u611f\u7684\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002\n<\/p>\n
          \n\u7279\u306bCIDR\u8868\u8a18\u3084\u4e2d\u9593\u5024\u30de\u30b9\u30af\uff08240\u3001248\u306a\u3069\uff09\u306e\u8003\u3048\u65b9\u306b\u6163\u308c\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u8a66\u9a13\u3067\u51fa\u984c\u3055\u308c\u308b\u591a\u69d8\u306a\u30d1\u30bf\u30fc\u30f3\u306b\u3082\u67d4\u8edf\u306b\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002\n<\/p>\n
          \n\u6570\u5024\u306e\u300c\u533a\u5207\u308a\u611f\u899a\u300d\u3092\u63b4\u3080\u3053\u3068\u3067\u3001\u8a08\u7b97\u30df\u30b9\u3084\u6df7\u4e71\u3082\u6e1b\u308a\u3001\u81ea\u4fe1\u3092\u3082\u3063\u3066\u672c\u756a\u306b\u81e8\u3081\u308b\u306f\u305a\u3067\u3059\u3002\u3057\u3063\u304b\u308a\u7406\u89e3\u3057\u3001\u7e70\u308a\u8fd4\u3057\u7df4\u7fd2\u3057\u3066\u5f97\u70b9\u6e90\u306b\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
          IP\u30a2\u30c9\u30ec\u30b9\u3068\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7cfb\u306e\u8a66\u9a13\u306b\u304a\u3051\u308b\u983b\u51fa\u30c8\u30d4\u30c3\u30af\u3067\u3059\u3002\u7279\u306b\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u308b\u300d\u554f\u984c\u306f\u3001\u7406\u5c48\u3067\u306f\u7406\u89e3\u3057\u3066\u3044\u3066\u3082\u5b9f\u969b\u306b\u624b\u3092\u52d5\u304b\u3059\u3068\u3064\u307e\u305a\u304f\u4eba\u3082\u591a\u3044\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b … <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","columnck":"","stmeta_robots":"index, follow","st_titlewords":"","st_title_extra":"","st_keywords":"","st_description":"","st_display_ad_mark":"","st_display_ad_mark_hide":"","textcopyck":"","st_copyright":"","st_copyurl":"","eyecatch_set":"","st_youtube_url":"","st_youtube_eyecatch":"","headerwidget_set":"","updatewidget_set":"","kanrenwidget_set":"","ikkatuwidget_set":"","koukoku_set":"","auto_adsense_koukoku_set":"","st_redirect":"","st_redirect_url_as_canonical":"","st_redirect_pvm_do_not_track":"","post_data_updatewidget_set":"","st_post_header_under_bg":"","st_twitter_tag":"","affinger_note":"","rankdisplayck":"","st_head_code":"","st_footer_code":"","st_post_header_under_code":"","_st_toc_override":false,"_st_toc_settings":[]},"categories":[3],"tags":[5],"class_list":["post-5418","post","type-post","status-publish","format-standard","hentry","category-ipa","tag-5"],"_links":{"self":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/comments?post=5418"}],"version-history":[{"count":0,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/posts\/5418\/revisions"}],"wp:attachment":[{"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/media?parent=5418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/categories?post=5418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sky-peace.net\/certified\/wp-json\/wp\/v2\/tags?post=5418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}