{"id":7098,"date":"2025-10-05T08:30:00","date_gmt":"2025-10-04T23:30:00","guid":{"rendered":"https:\/\/blog.since2020.jp\/?p=7098"},"modified":"2026-09-29T14:32:17","modified_gmt":"2026-09-29T05:32:17","slug":"subnet-mask_glossary","status":"publish","type":"post","link":"https:\/\/since2020.jp\/media\/subnet-mask_glossary\/","title":{"rendered":"\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u518d\u8003\uff1aIPv4\u306e\u57fa\u790e\u304b\u3089VLSM\u3001\u81ea\u52d5\u5316\u306e\u672a\u6765\u307e\u3067"},"content":{"rendered":"\n<p>\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306e\u57fa\u672c\u304b\u3089CIDR\u3001VLSM\u3001\u30af\u30e9\u30a6\u30c9\u3001SD-WAN\u3001IPv6\u3001\u81ea\u52d5\u5316\u307e\u3067\u3092\u4f53\u7cfb\u7684\u306b\u89e3\u8aac\u3002IPv4\u30a2\u30c9\u30ec\u30b9\u3092\u52b9\u7387\u7684\u306b\u8a2d\u8a08\u30fb\u904b\u7528\u3059\u308b\u8003\u3048\u65b9\u3068\u3001Infrastructure as Code\u3084AI\u6642\u4ee3\u306b\u6c42\u3081\u3089\u308c\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n<h2>\u306f\u3058\u3081\u306b\uff1a\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306f\u300cIP\u3092\u5206\u3051\u308b\u6280\u8853\u300d\u3060\u3051\u3067\u306f\u306a\u3044<\/h2>\n<p>\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306f\u3001IPv4\u30a2\u30c9\u30ec\u30b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u3068\u30db\u30b9\u30c8\u90e8\u3092\u533a\u5207\u308b\u305f\u3081\u306e\u57fa\u672c\u6280\u8853\u3067\u3059\u3002\u4e00\u898b\u3059\u308b\u3068\u53e4\u5178\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u77e5\u8b58\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u30af\u30e9\u30a6\u30c9\u3001\u30bc\u30ed\u30c8\u30e9\u30b9\u30c8\u3001SD-WAN\u3001Infrastructure as Code\uff08IaC\uff09\u304c\u666e\u53ca\u3057\u305f\u73fe\u5728\u3067\u3082\u91cd\u8981\u6027\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u7279\u306bCIDR\uff08Classless Inter-Domain Routing\uff09\u3084VLSM\uff08Variable Length Subnet Mask\uff09\u3092\u6d3b\u7528\u3059\u308c\u3070\u3001\u9650\u3089\u308c\u305fIPv4\u30a2\u30c9\u30ec\u30b9\u3092\u52b9\u7387\u3088\u304f\u914d\u5206\u3057\u306a\u304c\u3089\u3001\u901a\u4fe1\u7d4c\u8def\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5883\u754c\u3082\u8a2d\u8a08\u3067\u304d\u307e\u3059\u3002\u3055\u3089\u306bTerraform\u306a\u3069\u306b\u3088\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u6210\u306e\u30b3\u30fc\u30c9\u5316\u304c\u9032\u307f\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u8a2d\u8a08\u306f\u300c\u624b\u4f5c\u696d\u3067\u8a2d\u5b9a\u3059\u308b\u3082\u306e\u300d\u304b\u3089\u300c\u30eb\u30fc\u30eb\u3068\u3057\u3066\u7ba1\u7406\u3059\u308b\u3082\u306e\u300d\u3078\u5909\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>1. \u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u306e\u57fa\u672c\u69cb\u9020<\/h2>\n<p>IPv4\u30a2\u30c9\u30ec\u30b9\u306f32\u30d3\u30c3\u30c8\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002\u4f8b\u3048\u3070\u300c192.168.1.10\/24\u300d\u306e\u300c\/24\u300d\u306f\u3001\u5148\u982d24\u30d3\u30c3\u30c8\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u5f93\u6765\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u8868\u8a18\u306a\u3089\u300c255.255.255.0\u300d\u3067\u3059\u3002<\/p>\n<p>IP\u30a2\u30c9\u30ec\u30b9\u3068\u30b5\u30d6\u30cd\u30c3\u30c8\u30de\u30b9\u30af\u3092\u30d3\u30c3\u30c8\u5358\u4f4d\u3067AND\u6f14\u7b97\u3059\u308b\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3092\u6c42\u3081\u3089\u308c\u307e\u3059\u3002192.168.1.10\/24\u306a\u3089\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306f192.168.1.0\u3068\u306a\u308a\u3001\u901a\u5e38\u306eIPv4\u30b5\u30d6\u30cd\u30c3\u30c8\u3067\u306f192.168.1.1\uff5e192.168.1.254\u3092\u30db\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9\u3068\u3057\u3066\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u73fe\u5728\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u3067\u306f\u3001A\u30fbB\u30fbC\u3068\u3044\u3046\u30af\u30e9\u30b9\u30d5\u30eb\u306a\u5206\u985e\u3088\u308a\u3082CIDR\u8868\u8a18\u304c\u57fa\u672c\u3067\u3059\u3002\u300c\/16\u300d\u300c\/24\u300d\u300c\/28\u300d\u306e\u3088\u3046\u306b\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u9577\u3067\u7bc4\u56f2\u3092\u8868\u73fe\u3067\u304d\u308b\u305f\u3081\u3001\u5fc5\u8981\u306a\u898f\u6a21\u306b\u5408\u308f\u305b\u3066\u67d4\u8edf\u306b\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u5206\u5272\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>2. \u306a\u305c\u30b5\u30d6\u30cd\u30c3\u30c8\u5316\u3059\u308b\u306e\u304b<\/h2>\n<p>\u30b5\u30d6\u30cd\u30c3\u30c8\u5316\u306e\u76ee\u7684\u306f\u3001\u5358\u7d14\u306aIP\u30a2\u30c9\u30ec\u30b9\u306e\u7bc0\u7d04\u3060\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u9069\u5207\u306a\u5358\u4f4d\u306b\u5206\u5272\u3059\u308b\u3053\u3068\u3067\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3001\u969c\u5bb3\u7bc4\u56f2\u3001\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3001\u904b\u7528\u7ba1\u7406\u3092\u6574\u7406\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u3059\u3079\u3066\u306e\u7aef\u672b\u3092\u4e00\u3064\u306e\u5927\u304d\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u53ce\u5bb9\u3059\u308b\u3068\u3001\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u306a\u3069\u306eL2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304c\u5e83\u7bc4\u56f2\u306b\u53ca\u3073\u3001\u969c\u5bb3\u3084\u8a2d\u5b9a\u5909\u66f4\u306e\u5f71\u97ff\u7bc4\u56f2\u3082\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002\u7528\u9014\u3054\u3068\u306b\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u5206\u3051\u308c\u3070\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5883\u754c\u3092\u660e\u78ba\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u3001\u696d\u52d9\u30b7\u30b9\u30c6\u30e0\u3001\u7ba1\u7406\u7aef\u672b\u3001\u30b5\u30fc\u30d0\u30fc\u3001IoT\u6a5f\u5668\u306a\u3069\u3092\u5225\u30b5\u30d6\u30cd\u30c3\u30c8\u306b\u914d\u7f6e\u3057\u3001\u30eb\u30fc\u30bf\u30fc\u3084\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001ACL\uff08Access Control List\uff09\u3067\u901a\u4fe1\u3092\u5236\u5fa1\u3059\u308b\u8a2d\u8a08\u3082\u4e00\u822c\u7684\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u5206\u3051\u308b\u3060\u3051\u3067\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u304c\u78ba\u4fdd\u3055\u308c\u308b\u308f\u3051\u3067\u306f\u306a\u304f\u3001\u5b9f\u969b\u306e\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u30dd\u30ea\u30b7\u30fc\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p><!-- notionvc: 6100d880-1c64-4cab-9526-ee006d723192 --><\/p>\n<h2>3. \u73fe\u5834\u3067\u4f7f\u3048\u308b\u30b5\u30d6\u30cd\u30c3\u30c8\u8a2d\u8a08\u306e\u8003\u3048\u65b9<\/h2>\n<p>\u5b9f\u52d9\u3067\u306f\u3001\u307e\u305a\u300c\u4f55\u53f0\u306e\u7aef\u672b\u304c\u5fc5\u8981\u304b\u300d\u3060\u3051\u3067\u306a\u304f\u3001\u300c\u4eca\u5f8c\u3069\u3053\u307e\u3067\u5897\u3048\u308b\u304b\u300d\u3092\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u307050\u53f0\u7a0b\u5ea6\u306e\u30db\u30b9\u30c8\u3092\u53ce\u5bb9\u3059\u308b\u306a\u3089\u3001\/26\u306f64\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3061\u3001\u4e00\u822c\u7684\u306aIPv4\u30b5\u30d6\u30cd\u30c3\u30c8\u3067\u306f62\u30a2\u30c9\u30ec\u30b9\u3092\u30db\u30b9\u30c8\u306b\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u4e00\u65b9\u3001\/27\u3067\u306f32\u30a2\u30c9\u30ec\u30b9\u3057\u304b\u306a\u3044\u305f\u3081\u4e0d\u8db3\u3057\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3057\u3001\u5fc5\u8981\u30db\u30b9\u30c8\u6570\u3060\u3051\u3067\u6700\u5c0f\u30b5\u30a4\u30ba\u3092\u6c7a\u3081\u308b\u3068\u3001\u5c06\u6765\u306e\u5897\u8a2d\u3067\u518d\u8a2d\u8a08\u304c\u5fc5\u8981\u306b\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u73fe\u5728\u306e\u5229\u7528\u6570\u3001\u4e88\u6e2c\u3055\u308c\u308b\u5897\u52a0\u3001\u7528\u9014\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3001\u969c\u5bb3\u5206\u96e2\u306a\u3069\u3092\u307e\u3068\u3081\u3066CIDR\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001RFC 1918\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IPv4\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3067\u3042\u308b10.0.0.0\/8\u3001172.16.0.0\/12\u3001192.168.0.0\/16\u3092\u7528\u9014\u306b\u5fdc\u3058\u3066\u8a08\u753b\u7684\u306b\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p><!-- notionvc: 56433a37-8195-46b7-a56a-93351e8da9dd --><\/p>\n<h2>4. VLSM\u3067IPv4\u30a2\u30c9\u30ec\u30b9\u3092\u52b9\u7387\u5316\u3059\u308b<\/h2>\n<p>VLSM\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3054\u3068\u306b\u7570\u306a\u308b\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u9577\u3092\u8a2d\u5b9a\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u56fa\u5b9a\u9577\u3067\u540c\u3058\u30b5\u30a4\u30ba\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u5927\u91cf\u306b\u4f5c\u308b\u3088\u308a\u3001\u5fc5\u8981\u306a\u30db\u30b9\u30c8\u6570\u306b\u5408\u308f\u305b\u3066\u30b5\u30a4\u30ba\u3092\u5909\u3048\u3089\u308c\u308b\u305f\u3081\u3001IPv4\u30a2\u30c9\u30ec\u30b9\u3092\u52b9\u7387\u7684\u306b\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u3042\u308b\u62e0\u70b9\u306b100\u53f0\u3001\u5225\u306e\u62e0\u70b9\u306b40\u53f0\u3001\u3055\u3089\u306b\u5c0f\u898f\u6a21\u306a\u7ba1\u7406\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b10\u53f0\u304c\u5fc5\u8981\u3060\u3068\u3057\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u3059\u3079\u3066\u3092\u540c\u3058\u30b5\u30a4\u30ba\u306b\u3059\u308b\u3088\u308a\u3001\/25\u3001\/26\u3001\/28\u306a\u3069\u5fc5\u8981\u898f\u6a21\u306b\u5fdc\u3058\u3066\u5272\u308a\u5f53\u3066\u308b\u65b9\u304c\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u6709\u52b9\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>VLSM\u3067\u306f\u300c\u5927\u304d\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304b\u3089\u9806\u756a\u306b\u5272\u308a\u5f53\u3066\u308b\u300d\u300c\u30a2\u30c9\u30ec\u30b9\u7bc4\u56f2\u304c\u91cd\u8907\u3057\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u300d\u300c\u5c06\u6765\u306e\u62e1\u5f35\u9818\u57df\u3092\u78ba\u4fdd\u3059\u308b\u300d\u3068\u3044\u3063\u305f\u8a2d\u8a08\u539f\u5247\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001VLSM\u3092\u5229\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u4f7f\u7528\u3059\u308b\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30c8\u30b3\u30eb\u304cCIDR\u3084\u53ef\u5909\u9577\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u9069\u5207\u306b\u6271\u3048\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u73fe\u4ee3\u306eIP\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u30af\u30e9\u30b9\u30ec\u30b9\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u304c\u4e00\u822c\u7684\u3067\u3059\u304c\u3001\u53e4\u3044\u6a5f\u5668\u3084\u7279\u6b8a\u306a\u74b0\u5883\u3067\u306f\u4e92\u63db\u6027\u306e\u78ba\u8a8d\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p><!-- notionvc: b2f069cd-38b2-4d9c-9a48-36b875846fd4 --><\/p>\n<h2>5. \u30af\u30e9\u30a6\u30c9\u3067\u306f\u300c\u30b5\u30d6\u30cd\u30c3\u30c8\u8a2d\u8a08\u300d\u304c\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u8a2d\u8a08\u306b\u306a\u308b<\/h2>\n<p>\u30af\u30e9\u30a6\u30c9\u74b0\u5883\u3067\u306f\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u306f\u5358\u306a\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u533a\u5207\u308a\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002AWS VPC\u3084Azure Virtual Network\u306a\u3069\u3067\u306f\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u8a2d\u8a08\u304c\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fc\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306a\u3069\u306e\u69cb\u6210\u3068\u5bc6\u63a5\u306b\u95a2\u4fc2\u3057\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u5916\u90e8\u516c\u958b\u304c\u5fc5\u8981\u306a\u30ea\u30bd\u30fc\u30b9\u3068\u5185\u90e8\u30b7\u30b9\u30c6\u30e0\u3092\u7570\u306a\u308b\u30b5\u30d6\u30cd\u30c3\u30c8\u306b\u914d\u7f6e\u3057\u3001\u30eb\u30fc\u30c8\u30c6\u30fc\u30d6\u30eb\u3084\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5236\u5fa1\u306b\u3088\u3063\u3066\u901a\u4fe1\u7d4c\u8def\u3092\u7ba1\u7406\u3059\u308b\u8a2d\u8a08\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u304c\u300c\u5f8c\u304b\u3089\u5909\u66f4\u3057\u306b\u304f\u3044\u300d\u3068\u3044\u3046\u30af\u30e9\u30a6\u30c9\u7279\u6709\u306e\u554f\u984c\u3067\u3059\u3002VPC\u3084VNet\u306e\u30a2\u30c9\u30ec\u30b9\u7bc4\u56f2\u3001\u30aa\u30f3\u30d7\u30ec\u30df\u30b9\u3068\u306e\u63a5\u7d9a\u3001\u8907\u6570\u74b0\u5883\u9593\u306e\u91cd\u8907\u306a\u3069\u3092\u5341\u5206\u306b\u691c\u8a0e\u305b\u305aCIDR\u3092\u6c7a\u3081\u308b\u3068\u3001\u5f8c\u306e\u62e1\u5f35\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7d71\u5408\u3067\u5236\u7d04\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001\u958b\u767a\u30fb\u691c\u8a3c\u30fb\u672c\u756a\u3068\u3044\u3063\u305f\u74b0\u5883\u3060\u3051\u3067\u306a\u304f\u3001\u30ea\u30fc\u30b8\u30e7\u30f3\u3001\u30a2\u30ab\u30a6\u30f3\u30c8\u3001\u62e0\u70b9\u3001\u5c06\u6765\u306e\u63a5\u7d9a\u5148\u307e\u3067\u542b\u3081\u305f\u30a2\u30c9\u30ec\u30b9\u8a08\u753b\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><!-- notionvc: e820b276-279f-4f1e-8fb2-f3777bc25492 --><\/p>\n<h2>6. SD-WAN\u3084\u30bc\u30ed\u30c8\u30e9\u30b9\u30c8\u6642\u4ee3\u306e\u30b5\u30d6\u30cd\u30c3\u30c8<\/h2>\n<p>SD-WAN\u3067\u306f\u8907\u6570\u62e0\u70b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u8ad6\u7406\u7684\u306b\u63a5\u7d9a\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30dd\u30ea\u30b7\u30fc\u306b\u5fdc\u3058\u3066\u901a\u4fe1\u7d4c\u8def\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002\u3053\u306e\u74b0\u5883\u3067\u3082\u3001\u62e0\u70b9\u3084\u7528\u9014\u3092\u8b58\u5225\u3067\u304d\u308bIP\u30a2\u30c9\u30ec\u30b9\u8a2d\u8a08\u304c\u57fa\u76e4\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3001\u30bc\u30ed\u30c8\u30e9\u30b9\u30c8\u3067\u306f\u300c\u540c\u3058\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u3044\u308b\u304b\u3089\u5b89\u5168\u300d\u3068\u3044\u3046\u8003\u3048\u65b9\u3092\u63a1\u7528\u3057\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u5206\u5272\u3060\u3051\u3067\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u6210\u7acb\u3055\u305b\u308b\u306e\u3067\u306f\u306a\u304f\u3001ID\u3001\u7aef\u672b\u72b6\u614b\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3001\u901a\u4fe1\u30dd\u30ea\u30b7\u30fc\u306a\u3069\u8907\u6570\u306e\u8981\u7d20\u3092\u7d44\u307f\u5408\u308f\u305b\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u73fe\u4ee3\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u8a2d\u8a08\u3067\u306f\u3001\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6027\u80fd\u300d\u3068\u300cIP\u30a2\u30c9\u30ec\u30b9\u7bc0\u7d04\u300d\u3060\u3051\u3067\u306a\u304f\u3001\u300c\u3069\u306e\u901a\u4fe1\u3092\u8a31\u53ef\u3057\u3001\u3069\u3053\u3067\u5236\u5fa1\u3059\u308b\u304b\u300d\u3068\u3044\u3046\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u8a08\u307e\u3067\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><!-- notionvc: 49bee7c6-c75c-4e31-8d86-e111cd728e77 --><\/p>\n<h2>7. \u30b5\u30d6\u30cd\u30c3\u30c8\u8a2d\u8a08\u3092\u30b3\u30fc\u30c9\u3067\u7ba1\u7406\u3059\u308b<\/h2>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u5927\u898f\u6a21\u306b\u306a\u308b\u307b\u3069\u3001\u624b\u4f5c\u696d\u306b\u3088\u308b\u8a2d\u5b9a\u7ba1\u7406\u306f\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002\u305d\u3053\u3067Terraform\u306a\u3069\u306eIaC\u30c4\u30fc\u30eb\u3092\u5229\u7528\u3057\u3001VPC\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u3001\u30eb\u30fc\u30c8\u30c6\u30fc\u30d6\u30eb\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u306a\u3069\u3092\u30b3\u30fc\u30c9\u3068\u3057\u3066\u7ba1\u7406\u3059\u308b\u65b9\u6cd5\u304c\u5e83\u304c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30fc\u30c9\u5316\u3059\u308b\u3068\u3001Git\u306b\u3088\u308b\u5909\u66f4\u5c65\u6b74\u7ba1\u7406\u3001\u30ec\u30d3\u30e5\u30fc\u3001CI\/CD\u306b\u3088\u308b\u691c\u8a3c\u3001\u81ea\u52d5\u30c7\u30d7\u30ed\u30a4\u306a\u3069\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u300c\u672c\u756a\u74b0\u5883\u3067\u306f\u3053\u306eCIDR\u3092\u4f7f\u7528\u3059\u308b\u300d\u300c\u7279\u5b9a\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u306b\u306f\u7279\u5b9a\u306e\u30eb\u30fc\u30c8\u3092\u8a2d\u5b9a\u3059\u308b\u300d\u3068\u3044\u3063\u305f\u30eb\u30fc\u30eb\u3092\u30b3\u30fc\u30c9\u3068\u3057\u3066\u660e\u6587\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>Ansible\u306a\u3069\u306e\u69cb\u6210\u7ba1\u7406\u30c4\u30fc\u30eb\u3068\u7d44\u307f\u5408\u308f\u305b\u308c\u3070\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306e\u8a2d\u5b9a\u5909\u66f4\u307e\u3067\u81ea\u52d5\u5316\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u91cd\u8981\u306a\u306e\u306f\u3001\u5358\u306b\u8a2d\u5b9a\u4f5c\u696d\u3092\u81ea\u52d5\u5316\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u300c\u6b63\u3057\u3044\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u305d\u306e\u3082\u306e\u3092\u518d\u73fe\u53ef\u80fd\u306a\u5f62\u3067\u7ba1\u7406\u3059\u308b\u300d\u3053\u3068\u3067\u3059\u3002<\/p>\n<p><!-- notionvc: 5cd0760b-1048-48f9-81c4-e701479d312e --><\/p>\n<h2>8. IPv6\u3067\u306f\u30b5\u30d6\u30cd\u30c3\u30c8\u306e\u8003\u3048\u65b9\u3082\u5909\u308f\u308b<\/h2>\n<p>IPv6\u306f128\u30d3\u30c3\u30c8\u306e\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3092\u6301\u3064\u305f\u3081\u3001IPv4\u306e\u3088\u3046\u306b\u30a2\u30c9\u30ec\u30b9\u4e0d\u8db3\u3092\u907f\u3051\u308b\u76ee\u7684\u3060\u3051\u3067\u7d30\u304b\u304f\u7bc0\u7d04\u3059\u308b\u5fc5\u8981\u6027\u306f\u5927\u304d\u304f\u3042\u308a\u307e\u305b\u3093\u3002\u4e00\u822c\u7684\u306aLAN\u3067\u306f\/64\u3092\u5229\u7528\u3059\u308b\u8a2d\u8a08\u304c\u57fa\u672c\u3068\u306a\u308a\u3001\u30b5\u30a4\u30c8\u5168\u4f53\u3084\u7d44\u7e54\u3078\u306e\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u5272\u308a\u5f53\u3066\u304b\u3089\u3001\u5404\u30bb\u30b0\u30e1\u30f3\u30c8\u3078\/64\u3092\u914d\u5206\u3059\u308b\u3068\u3044\u3046\u968e\u5c64\u69cb\u9020\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>IPv6\u3067\u306f\u3001\u30a2\u30c9\u30ec\u30b9\u6570\u305d\u306e\u3082\u306e\u3088\u308a\u3082\u3001\u96c6\u7d04\u3057\u3084\u3059\u3044\u30a2\u30c9\u30ec\u30b9\u8a08\u753b\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3001\u30bb\u30b0\u30e1\u30f3\u30c8\u8a2d\u8a08\u3001\u904b\u7528\u30eb\u30fc\u30eb\u304c\u91cd\u8981\u3067\u3059\u3002\u307e\u305fIPv4\u3068IPv6\u3092\u4f75\u7528\u3059\u308b\u30c7\u30e5\u30a2\u30eb\u30b9\u30bf\u30c3\u30af\u74b0\u5883\u3067\u306f\u3001\u4e21\u65b9\u306e\u30a2\u30c9\u30ec\u30b9\u4f53\u7cfb\u3092\u6574\u5408\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<!-- notionvc: bd1ceab0-4876-4cfa-9671-1d9e30712983 --><\/p>\n\n\n<h2 class=\"wp-block-heading\">9. 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