{"id":42381,"date":"2023-09-16T17:28:15","date_gmt":"2023-09-16T08:28:15","guid":{"rendered":"https:\/\/kinsta.com\/jp\/?p=42381&#038;post_type=knowledgebase&#038;preview_id=42381"},"modified":"2025-10-02T04:46:02","modified_gmt":"2025-10-01T19:46:02","slug":"what-is-arp","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/what-is-arp\/","title":{"rendered":"\u30a2\u30c9\u30ec\u30b9\u89e3\u6c7a\u30d7\u30ed\u30c8\u30b3\u30ebARP\u3068\u306f"},"content":{"rendered":"<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u30672\u3064\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3061\u307e\u3059\u30021\u3064\u306f\u6c38\u7d9a\u7684\u306a\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u307e\u305f\u306f\u30e1\u30c7\u30a3\u30a2\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\uff08MAC\uff09\u30a2\u30c9\u30ec\u30b9\u3001\u3082\u30461\u3064\u306f<a href=\"https:\/\/kinsta.com\/jp\/tools\/what-is-my-ip\/\">IP\u30a2\u30c9\u30ec\u30b9<\/a>\u3068\u3057\u3066\u77e5\u3089\u308c\u308b\u3001\u8ad6\u7406\u7684\u306a\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30d7\u30ed\u30c8\u30b3\u30eb\u30a2\u30c9\u30ec\u30b9\u3067\u3059\u3002\u591a\u304f\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u5b9a\u671f\u7684\u306b\u5909\u66f4\u3055\u308c\u308b\u4e2d\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306f\u3069\u306e\u3088\u3046\u306b\u3057\u3066\u7121\u6570\u306eIP\u30921\u3064\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306b\u95a2\u9023\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u305d\u306e\u7b54\u3048\u306f\u3001Address Resolution Protocol\uff08\u30a2\u30c9\u30ec\u30b9\u89e3\u6c7a\u30d7\u30ed\u30c8\u30b3\u30eb\uff09\u3001\u901a\u79f0APR\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>ARP\u306e\u5f79\u5272\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u63db\u3059\u308b\u3053\u3068\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u4fbf\u5229\u306a\u6a5f\u80fd\u3067\u3059\u304c\u3001\u305d\u306e\u53cd\u9762\u3001\u6a5f\u5bc6\u6027\u306e\u9ad8\u3044\u30c7\u30fc\u30bf\u3092\u6f5c\u5728\u7684\u306b\u508d\u53d7\u3057\u3066\u3057\u307e\u3046\u306a\u3069\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u61f8\u5ff5\u70b9\u3082\u898b\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u3067\u306f\u3001ARP\u306f\u3069\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3059\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001ARP\u306e\u6982\u8981\u3001\u985e\u4f3c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u306e\u6bd4\u8f03\u3001\u3055\u307e\u3056\u307e\u306a\u7a2e\u985e\u3068\u4f7f\u7528\u4e8b\u4f8b\u3001\u305d\u3057\u3066\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u4f7f\u7528\u3059\u308b\u969b\u306e\u30ea\u30b9\u30af\u306b\u3064\u3044\u3066\u3054\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n<p><b data-stringify-type=\"bold\"><a class=\"c-link\" href=\"https:\/\/www.youtube.com\/watch?v=DQ-6v1pCfrE\" target=\"_blank\" rel=\"noopener noreferrer\" data-stringify-link=\"https:\/\/www.youtube.com\/watch?v=DQ-6v1pCfrE\" data-sk=\"tooltip_parent\">ARP\u306b\u3064\u3044\u3066\u52d5\u753b\u3067\u306e\u89e3\u8aac\u3082\u3054\u7528\u610f\u3057\u3066\u3044\u307e\u3059<\/a><\/b>\u3002<\/p>\n<kinsta-video src=\"https:\/\/www.youtube.com\/watch?v=DQ-6v1pCfrE\"><\/kinsta-video>\n<h2>ARP\u3068\u306f<\/h2>\n<p>Address Resolution Protocol\uff08\u30a2\u30c9\u30ec\u30b9\u89e3\u6c7a\u30d7\u30ed\u30c8\u30b3\u30eb\uff09\u3001\u901a\u79f0APR\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068\u7269\u7406\u7684\u306a\u30de\u30b7\u30f3\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u63db\uff08\u89e3\u6c7a\uff09\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u4e00\u822c\u7684\u306a\u624b\u6cd5\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e2\u3064\u306e\u30a2\u30c9\u30ec\u30b9\u306f\u9577\u3055\u3068\u5f62\u5f0f\u304c\u7570\u306a\u308b\u305f\u3081\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3084\u305d\u306e\u4ed6\u306e\u6a5f\u5668\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u901a\u4fe1\u3092\u884c\u3046\u305f\u3081\u306bARP\u306e\u5b58\u5728\u306f\u6b20\u304b\u305b\u307e\u305b\u3093\u3002\u305d\u306e\u91cd\u8981\u6027\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u307e\u305a\u306f\u3053\u306e2\u3064\u306e\u30a2\u30c9\u30ec\u30b9\u3068\u65e5\u5e38\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30e2\u30c7\u30eb\u3068\u306e\u95a2\u4fc2\u306b\u3064\u3044\u3066\u3054\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<figure style=\"width: 619px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/Address-resolution-protocol.png\" alt=\"ARP\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u63db\u3059\u308b\" width=\"619\" height=\"257\"><figcaption class=\"wp-caption-text\">ARP\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u63db\u3059\u308b<\/figcaption><\/figure>\n<h3>IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9<\/h3>\n<p>\u304a\u4f7f\u3044\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3084\u30b9\u30de\u30fc\u30c8\u30d5\u30a9\u30f3\u306a\u3069\u306e\u30c7\u30d0\u30a4\u30b9\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067<a href=\"https:\/\/kinsta.com\/blog\/static-vs-dynamic-ip\/\">IP<\/a>\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e2\u3064\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u306a\u305c\u30011\u3064\u306e\u30c7\u30d0\u30a4\u30b9\u306b2\u3064\u306e\u30a2\u30c9\u30ec\u30b9\u304c\u5fc5\u8981\u306a\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3092\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306b\u4f8b\u3048\u3066\u307f\u307e\u3059\u3002\u88fd\u9020\u30e9\u30a4\u30f3\u304b\u3089\u51fa\u8377\u3055\u308c\u305f\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306b\u306f\u3001\u4ed6\u306e\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u3068\u533a\u5225\u3059\u308b\u305f\u3081\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\uff08\u3042\u308b\u3044\u306f\u305d\u306e\u307b\u304b\u306e\u4e00\u610f\u306e\u8b58\u5225\u5b50\uff09\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306f\u3001\u3053\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3067\u8b58\u5225\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1242px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/Mobile-home-serial-number.jpg\" alt=\"\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306b\u306f\u56fa\u6709\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\" width=\"1242\" height=\"706\"><figcaption class=\"wp-caption-text\">\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306b\u306f\u56fa\u6709\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b<\/figcaption><\/figure>\n<p>\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u3092\u8cfc\u5165\u3057\u3001\u8fd1\u6240\u306b\u99d0\u8eca\u3059\u308b\u3068\u3001\u3069\u306e\u6577\u5730\u306b\u505c\u3081\u305f\u304b\u306b\u3088\u3063\u3066\u3001\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306b\u306f\u4f4f\u6240\u304c\u4ed8\u4e0e\u3055\u308c\u307e\u3059\u3002\u300c1\u4e01\u76ee1\u756a\u5730\u300d\u3068\u3057\u307e\u3057\u3087\u3046\u3002\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u304c\u305d\u306e\u6577\u5730\u306b\u3042\u308b\u9650\u308a\u3001\u4f4f\u6240\u306f\u300c1\u4e01\u76ee1\u756a\u5730\u300d\u306e\u307e\u307e\u3067\u3059\u304c\u3001\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u3092\u52d5\u304b\u305b\u3070\u3001\u4f4f\u6240\u306f\u300c1\u4e01\u76ee25\u756a\u5730\u300d\u306e\u3088\u3046\u306b\u4e00\u77ac\u3067\u5909\u5316\u3057\u307e\u3059\u3002<\/p>\n\n<p>\u3053\u306e\u6642\u70b9\u3067\u3001\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306f\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3068\u4f4f\u6240\u306e2\u7a2e\u985e\u306e\u8b58\u5225\u60c5\u5831\u3092\u6301\u3064\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u4f4f\u6240\u306f\u305d\u306e\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u304c\u4e16\u754c\u306e\u3069\u3053\u306b\u4f4d\u7f6e\u3059\u308b\u306e\u304b\u3092\u793a\u3057\u3001\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u306f\u540c\u3058\u88fd\u9020\u30e9\u30a4\u30f3\u306b\u3042\u308b\u4ed6\u306e\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u3092\u533a\u5225\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u3082\u3053\u308c\u3068\u540c\u3058\u3088\u3046\u306a\u5f79\u5272\u3092\u6301\u3061\u3001\u3053\u306e\u4f8b\u3067\u306f\u8fd1\u96a3\uff081\u756a\u5730\u300125\u756a\u5730\u306a\u3069\uff09\u304c\u30ed\u30fc\u30ab\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u3042\u305f\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u4e00\u610f\u306e\u7269\u7406\u7684\u8b58\u5225\u5b50\u3067\u3001\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u3067\u8a00\u3046\u3068\u3053\u308d\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3002\u3053\u306e\u305f\u3081\u3001MAC\u30a2\u30c9\u30ec\u30b9\u306f\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u307e\u305f\u306f\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30a2\u30c9\u30ec\u30b9\u3068\u547c\u3070\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u540c\u69d8\u3001MAC\u30a2\u30c9\u30ec\u30b9\u306f\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<figure style=\"width: 560px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/MAC-addresses.png\" alt=\"\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u76f4\u63a5\u5370\u5237\u3055\u308c\u305fMAC\u30a2\u30c9\u30ec\u30b9\uff08\u51fa\u5178: LearnTomato\uff09\" width=\"560\" height=\"315\"><figcaption class=\"wp-caption-text\">\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u76f4\u63a5\u5370\u5237\u3055\u308c\u305fMAC\u30a2\u30c9\u30ec\u30b9\uff08<strong>\u51fa\u5178:<\/strong> <a href=\"https:\/\/learntomato.flashrouters.com\/what-is-a-mac-address-how-to-find-my-mac-address\/\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">LearnTomato<\/a>\uff09<\/figcaption><\/figure>\n<p>\u5bfe\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u4f4f\u6240\u306b\u3042\u305f\u308a\u307e\u3059\u3002\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u3092\u99d0\u8eca\u3057\u305f\u5834\u6240\u306b\u3088\u3063\u3066\u4f4f\u6240\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u3088\u3046\u306b\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u308b\u3068\u3001IP\u30a2\u30c9\u30ec\u30b9\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u3092\u52d5\u304b\u3059\u3068\u305d\u306e\u4f4f\u6240\u304c\u5207\u308a\u96e2\u3055\u308c\u308b\u306e\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304b\u3089\u5207\u65ad\u3055\u308c\u308b\u3068\u3001IP\u30a2\u30c9\u30ec\u30b9\u3082\u5931\u308f\u308c\u307e\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u518d\u63a5\u7d9a\u3059\u308b\u3068\u3001\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u3092\u5225\u306e\u4f4f\u6240\u306b\u99d0\u8eca\u3059\u308b\u3088\u3046\u306b\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306b\u306f\u5225\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u4e0e\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u3082\u3061\u308d\u3093\u3001IP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u4f4f\u6240\u3068\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u306e\u4f8b\u306b\u5b8c\u5168\u306b\u5f53\u3066\u306f\u307e\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u90f5\u4fbf\u5c40\u54e1\u306f\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306e\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3092\u77e5\u3089\u306a\u304f\u3066\u3082\u3001\u90f5\u4fbf\u7269\u3092\u5c4a\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3001\u3059\u306a\u308f\u3061<a href=\"https:\/\/kinsta.com\/jp\/blog\/ipv4-vs-ipv6\/\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30d7\u30ed\u30c8\u30b3\u30eb<\/a>\u3067\u306f\u3001\u30e1\u30fc\u30eb\u3084\u30d1\u30b1\u30c3\u30c8\u3092\u6b63\u3057\u3044\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306b\u5c4a\u3051\u308b\u305f\u3081\u306b\u4e21\u65b9\u306e\u30a2\u30c9\u30ec\u30b9\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_145454\" aria-describedby=\"caption-attachment-145454\" style=\"width: 1164px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-145454 size-full\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/MAC-vs-IP.png\" alt=\"MAC\u30a2\u30c9\u30ec\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u306e\u4e3b\u306a\u9055\u3044\uff08\u51fa\u5178: TechTarget\uff09\" width=\"1164\" height=\"720\"><figcaption id=\"caption-attachment-145454\" class=\"wp-caption-text\">MAC\u30a2\u30c9\u30ec\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u306e\u4e3b\u306a\u9055\u3044\uff08<strong>\u51fa\u5178:<\/strong> <a href=\"https:\/\/www.techtarget.com\/searchnetworking\/answer\/What-is-the-difference-between-an-IP-address-and-a-physical-address\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">TechTarget<\/a>\uff09<\/figcaption><\/figure>\n<p>MAC\u30a2\u30c9\u30ec\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u7570\u306a\u308b\u65b9\u6cd5\u3067\u8b58\u5225\u3057\u307e\u3059\u3002\u3053\u306e2\u3064\u306e\u30a2\u30c9\u30ec\u30b9\u306e\u4e3b\u306a\u9055\u3044\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30a2\u30c9\u30ec\u30b9\u306e\u5c64<\/strong>\uff1a\u3053\u306e2\u3064\u306e\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u958b\u653e\u578b\u30b7\u30b9\u30c6\u30e0\u9593\u76f8\u4e92\u63a5\u7d9a \uff08OSI\uff09\u30e2\u30c7\u30eb\u306e\u7570\u306a\u308b\u5c64\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002OSI\u30e2\u30c7\u30eb\u3067\u306f\u3001\u30c7\u30fc\u30bf\u304c\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u9593\u3067\u9001\u53d7\u4fe1\u3055\u308c\u308b\u969b\u306b\u901a\u904e\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u304c\u6bb5\u968e\uff08\u5c64\uff09\u306b\u5206\u304b\u308c\u307e\u3059\u3002\u8a73\u7d30\u306f\u5272\u611b\u3057\u307e\u3059\u304c\u3001MAC\u30a2\u30c9\u30ec\u30b9\u306f\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\uff08\u7b2c2\u5c64\uff09\u3067\u52d5\u4f5c\u3057\u3001\u6709\u7dda\u3067\u9001\u3089\u308c\u308b\u96fb\u6c17\u4fe1\u53f7\u3068\u8ad6\u7406\u30c7\u30fc\u30bf\u3092\u76f4\u63a5\u5909\u63db\u3057\u307e\u3059\u3002IP\u30a2\u30c9\u30ec\u30b9\u306f\u30011\u3064\u4e0a\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\uff08\u7b2c3\u5c64\uff09\u3067\u52d5\u4f5c\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u306e\u30a2\u30c9\u30ec\u30b9\u3068\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30ed\u30fc\u30ab\u30eb\u3068\u30b0\u30ed\u30fc\u30d0\u30eb<\/strong>\uff1aMAC\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30aa\u30d5\u30a3\u30b9\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u5171\u6709\u3059\u308b\u8907\u6570\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306a\u3069\u3001\u30ed\u30fc\u30ab\u30eb\u306b\u7570\u306a\u308b\u6a5f\u5668\u3092\u8b58\u5225\u3059\u308b\u306e\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u5bfe\u3057\u3066IP\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u3088\u308a\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u6a5f\u80fd\u3057\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u30c7\u30d0\u30a4\u30b9\u306e\u4f4d\u7f6e\u3092\u7279\u5b9a\u3057\u3066\u901a\u4fe1\u65b9\u6cd5\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30a2\u30c9\u30ec\u30b9\u306e\u5f62\u5f0f<\/strong>\uff1aMAC\u30a2\u30c9\u30ec\u30b9\u3068IP\u30a2\u30c9\u30ec\u30b9\u306f\u7570\u306a\u308b\u5c64\u3067\u52d5\u4f5c\u3057\u3001\u7570\u306a\u308b\u5f79\u5272\u3092\u62c5\u3046\u305f\u3081\u3001\u305d\u306e\u5f62\u5f0f\u3082\u7570\u306a\u308a\u307e\u3059\u3002\u524d\u8005\u306f12\u6841\u306e\u6570\u5b57\u3092\u30cf\u30a4\u30d5\u30f3\u3084\u30b3\u30ed\u30f3\u3067\u533a\u5207\u3063\u3066\u30da\u30a2\u306b\u3057\u305f\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u306e\u3088\u3046\u306a\u5f62\u5f0f\uff0800:00:00:00:00:00\uff09\u3067\u3042\u308b\u306e\u306b\u5bfe\u3057\u3001\u5f8c\u8005\u306e<a href=\"https:\/\/kinsta.com\/jp\/blog\/ipv4-vs-ipv6\/\">IPv4\u30a2\u30c9\u30ec\u30b9<\/a>\u306f32\u30d3\u30c3\u30c8\uff082\u9032\u6570\u306e1\u6841\uff09\u306710\u9032\u6570\u306e4\u6841\uff08000.000.000.000\uff09\u306b\u30b0\u30eb\u30fc\u30d7\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5f8c\u307b\u3069\u3054\u8aac\u660e\u3057\u307e\u3059\u304c\u3001\u3053\u306e2\u3064\u306e\u5f62\u5f0f\u3092\u95a2\u9023\u4ed8\u3051\u308b\u3053\u3068\u304c\u3001ARP\u306e\u4e3b\u306a\u5f79\u5272\u3067\u3059\u3002<\/li>\n<li><strong>MAC\u30a2\u30c9\u30ec\u30b9\u306f\u6c38\u7d9a\u7684<\/strong>\uff1a\u30c8\u30ec\u30fc\u30e9\u30fc\u30cf\u30a6\u30b9\u306e\u4f8b\u3067\u3082\u898b\u305f\u3088\u3046\u306b\u3001MAC\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u304c\u88fd\u9020\u3055\u308c\u308b\u3068\u540c\u6642\u306b\u30e1\u30fc\u30ab\u30fc\u306b\u3088\u3063\u3066\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002\u57fa\u672c\u7684\u306b\u306f\u30c7\u30d0\u30a4\u30b9\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u57cb\u3081\u8fbc\u307e\u308c\u308b\u305f\u3081\u3001\u6c38\u7d9a\u7684\u306a\u30a2\u30c9\u30ec\u30b9\u3067\u3042\u308a\u3001\u5909\u66f4\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001IP\u30a2\u30c9\u30ec\u30b9\u306f\u4e00\u6642\u7684\u306a\u3082\u306e\u3067\u3001\u30c7\u30d0\u30a4\u30b9\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u308b\u305f\u3073\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u5bff\u547d\u304c\u5c3d\u304d\u308b\u307e\u3067\u306b\u8907\u6570\u306eIP\u30a2\u30c9\u30ec\u30b9\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u3053\u3068\u304c\u60f3\u5b9a\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u7269\u7406\u7684\u304b\u8ad6\u7406\u7684\u304b<\/strong>\uff1a\u4e0a\u8a18\u306e\u5ef6\u9577\u3067\u3001MAC\u30a2\u30c9\u30ec\u30b9\u306f\u7269\u7406\u30a2\u30c9\u30ec\u30b9\uff08\u307e\u305f\u306f\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30a2\u30c9\u30ec\u30b9\uff09\u3001IP\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u3042\u307e\u308a\u4e00\u822c\u7684\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u8ad6\u7406\u30a2\u30c9\u30ec\u30b9\u3068\u547c\u3070\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u6642\u671f<\/strong>\uff1a\u3059\u3067\u306b\u89e6\u308c\u305f\u901a\u308a\u3001MAC\u30a2\u30c9\u30ec\u30b9\u306f\u88fd\u9020\u6642\u306b\u4e00\u5ea6\u3060\u3051\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u306e\u306b\u5bfe\u3057\u3001IP\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u308b\u305f\u3073\u306b\u4f55\u5ea6\u3082\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u3067\u306f\u3001ARP\u306f\u3053\u306e2\u3064\u306e\u30a2\u30c9\u30ec\u30b9\u306b\u3069\u306e\u3088\u3046\u306b\u95a2\u4fc2\u3057\u3066\u304f\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u3059\u3079\u3066\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u4e21\u65b9\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u6240\u6301\u3059\u308b\u305f\u3081\u3001\u30d1\u30b1\u30c3\u30c8\u3092\u9069\u5207\u306a\u5b9b\u5148\u306b\u5c4a\u3051\u308b\u305f\u3081\u306b\u306f\u3001\u53cc\u65b9\u3092\u7d10\u4ed8\u3051\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u30c7\u30d0\u30a4\u30b9\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3068\u5909\u5316\u3092\u7e70\u308a\u8fd4\u3059IP\u30a2\u30c9\u30ec\u30b9\u306e\u7d10\u4ed8\u3051\u3053\u305d\u304c\u3001ARP\u306e\u4e2d\u6838\u3068\u306a\u308b\u6a5f\u80fd\u3067\u3059\u3002<\/p>\n<p>\u3053\u306eARP\u306e\u4ed5\u7d44\u307f\u3092\u6398\u308a\u4e0b\u3052\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3>ARP\u306e\u4ed5\u7d44\u307f<\/h3>\n<p>ARP\u3068\u306f\u4f55\u304b\u304c\u308f\u304b\u3063\u305f\u3068\u3053\u308d\u3067\u3001\u7d9a\u3044\u3066\u305d\u306e\u4ed5\u7d44\u307f\u306b\u8feb\u308a\u307e\u3059\u3002ARP\u306f\u3001MAC\u30a2\u30c9\u30ec\u30b9\u3068\u305d\u308c\u306b\u95a2\u9023\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u306e\u6700\u65b0\u306e\u30ea\u30b9\u30c8\u3092\u4fdd\u5b58\u3057\u307e\u3059\u3002\u3053\u306e\u30ea\u30b9\u30c8\u306f\u3001\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u307e\u305f\u306f\u30eb\u30fc\u30bf\u30fc\u3001\u3064\u307e\u308a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u30c7\u30d0\u30a4\u30b9\u9593\u306e\u30c7\u30fc\u30bf\u30d5\u30ed\u30fc\u7ba1\u7406\u3092\u62c5\u3046\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u30a4\u30c3\u30c1\u306b\u3088\u3063\u3066\u7dad\u6301\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u56f3\u3067\u8868\u3059\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1000px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/How-ARP-works.png\" alt=\"\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306eARP\uff08\u51fa\u5178: Fortinet\uff09\" width=\"1000\" height=\"600\"><figcaption class=\"wp-caption-text\">\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306eARP\uff08<strong>\u51fa\u5178<\/strong>\uff1a<a href=\"https:\/\/www.fortinet.com\/resources\/cyberglossary\/what-is-arp\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">Fortinet<\/a>\uff09<\/figcaption><\/figure>\n<p>\u5de6\u5074\u306b\u3042\u308b\u30db\u30b9\u30c8\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\uff08HOST\uff09\u304c\u3001\u53f3\u5074\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\uff08IP\u30a2\u30c9\u30ec\u30b9: 34.40.21.20\uff09\u306b\u4f55\u3089\u304b\u306e\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u3092\u6b63\u3057\u304f\u9001\u4fe1\u3059\u308b\u305f\u3081\u3001\u30db\u30b9\u30c8\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f\u5b9b\u5148\u3068\u306a\u308b\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3059\u3067\u306bIP\u30a2\u30c9\u30ec\u30b9\u306f\u308f\u304b\u3063\u3066\u3044\u307e\u3059\u304c\u3001MAC\u30a2\u30c9\u30ec\u30b9\u304c\u5fc5\u8981\u3067\u3059\u3002\u3053\u3053\u3067\u767b\u5834\u3059\u308b\u306e\u304cARP\u3067\u3059\u3002<\/p>\n<p><a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-iot\/\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u305f\u30c7\u30d0\u30a4\u30b9<\/a>\u3068\u30b9\u30a4\u30c3\u30c1\uff08\u3053\u306e\u4f8b\u3067\u306f\u30eb\u30fc\u30bf\u30fc\uff09\u304c\u3001\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0\u4e0a\u3067\u65e2\u77e5\u306eIP\u304b\u3089MAC\u30a2\u30c9\u30ec\u30b9\u3078\u306e\u5909\u63db\u30ea\u30b9\u30c8\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002\u3053\u306e\u30ea\u30b9\u30c8\u306f\u3001ARP\u30ad\u30e3\u30c3\u30b7\u30e5\u307e\u305f\u306fARP\u30c6\u30fc\u30d6\u30eb\u3068\u547c\u3070\u308c\u3001\u523b\u3005\u3068\u5909\u5316\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306b\u5e38\u306b\u66f4\u65b0\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f\u3001\u7279\u5b9a\u306eIP\u30a2\u30c9\u30ec\u30b9\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u969b\u3001\u307e\u305a\u306fARP\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u4e00\u81f4\u3059\u308bMAC\u30a2\u30c9\u30ec\u30b9\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u898b\u5f53\u305f\u3089\u306a\u3044\u5834\u5408\u306f\u3001\u305d\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306b\u5bfe\u3059\u308b\u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b1\u30c3\u30c8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n<p>\u4e0a\u306e\u56f3\u306b\u3042\u308b2\u53f0\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3092\u4f7f\u3063\u3066\u3001\u3053\u306e\u6d41\u308c\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<ol start=\"1\">\n<li>\u30db\u30b9\u30c8\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f\u3001ARP\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u300134.40.21.20\u306eMAC\u30a2\u30c9\u30ec\u30b9\u304c\u3059\u3067\u306b\u308f\u304b\u3063\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u306f\u3001\u5fc5\u8981\u306a\u3082\u306e\u304c\u3059\u3079\u3066\u63c3\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/li>\n<li>\uff08MAC\u30a2\u30c9\u30ec\u30b9\u304c\u308f\u304b\u3089\u306a\u3044\u5834\u5408\uff09\u30db\u30b9\u30c8\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f34.40.21.20\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/li>\n<li>\u30eb\u30fc\u30bf\u30fc\u306f\u3001\u30db\u30b9\u30c8\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304b\u3089\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u4fe1\u3057\u3001ARP\u3092\u4f7f\u3063\u3066MAC\u30a2\u30c9\u30ec\u30b9\u3092\u691c\u7d22\u3057\u307e\u3059\u3002<\/li>\n<li>ARP\u306f\u30eb\u30fc\u30bf\u30fc\u306e\u65e2\u5b58\u306eARP\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u53c2\u7167\u3057\u307e\u3059\u3002MAC\u30a2\u30c9\u30ec\u30b9\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u300134.40.21.20\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/li>\n<li>34.40.21.20\u306f\u3001MAC\u30a2\u30c9\u30ec\u30b9\uff08A5:22:98:5C:24:93\uff09\u3092\u30eb\u30fc\u30bf\u30fc\u306b\u9001\u308a\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<li>\u30eb\u30fc\u30bf\u30fc\u306fARP\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u66f4\u65b0\u3057\u300134.40.21.20\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u30db\u30b9\u30c8\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u306b\u9001\u4fe1\u3057\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b8c\u4e86\u3055\u305b\u307e\u3059\u3002<\/li>\n<li>\u30db\u30b9\u30c8\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306f\u300134.40.21.20\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u57fa\u672c\u7684\u306a\u4f8b\u306b\u306a\u308a\u307e\u3059\u304c\u3001ARP\u306e\u4e3b\u306a\u6a5f\u80fd\u3068\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u5341\u5206\u3067\u3059\u3002<\/p>\n<p>ARP\u306e\u3082\u30461\u3064\u306e\u30b3\u30a2\u6a5f\u80fd\u306f\u3001ARP\u30ad\u30e3\u30c3\u30b7\u30e5\u5185\u306eIP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u5909\u63db\u3092\u7dad\u6301\uff08\u304a\u3088\u3073\u30d1\u30fc\u30b8\uff09\u3059\u308b\u3053\u3068\u3002ARP\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6574\u7406\u3055\u308c\u305f\u72b6\u614b\u306b\u4fdd\u3064\u3053\u3068\u306f\u3001\u6700\u65b0\u60c5\u5831\u3092\u5f97\u308b\u305f\u3081\u3060\u3051\u3067\u306a\u304f\u3001\u4e0d\u6b63\u78ba\u306a\u30a2\u30c9\u30ec\u30b9\u3084\u672a\u4f7f\u7528\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u6392\u9664\u3059\u308b\u305f\u3081\u306b\u3082\u5f79\u7acb\u3061\u307e\u3059\u3002\u5f8c\u307b\u3069\u3054\u8aac\u660e\u3057\u307e\u3059\u304c\u3001\u5909\u63db\u3092\u30d1\u30fc\u30b8\u3059\u308b\u3053\u3068\u3067\u3001IP\u30a2\u30c9\u30ec\u30b9\u306e\u60aa\u7528\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>ARP\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30a8\u30f3\u30c8\u30ea\u306b\u306f\u3001\u52d5\u7684\u306a\u3082\u306e\u3068\u9759\u7684\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u524d\u8005\u306f\u4e0a\u3067\u89e6\u308c\u305f\u65b9\u6cd5\u3067\u81ea\u52d5\u5165\u529b\u3055\u308c\u308b\u3082\u306e\u3002\u5f8c\u8005\u306f\u3001\u6c38\u7d9a\u7684\u306b\u4fdd\u6301\u3057\u305f\u3044\u30a8\u30f3\u30c8\u30ea\u3092\u624b\u52d5\u3067\u6307\u5b9a\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u9759\u7684\u306a\u30a8\u30f3\u30c8\u30ea\u306f\u3001\u56fa\u5b9aIP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u6c38\u7d9a\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c7\u30d0\u30a4\u30b9\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<h3>DHCP\u3001DNS\u3068\u306e\u9055\u3044<\/h3>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u77e5\u8b58\u304c\u5c11\u3057\u3067\u3082\u3042\u308b\u65b9\u306a\u3089\u3001\u52d5\u7684\u30db\u30b9\u30c8\u69cb\u6210\u30d7\u30ed\u30c8\u30b3\u30eb\uff08DHCP\uff09\u3084<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-dns\/\">\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u30b7\u30b9\u30c6\u30e0\uff08DNS\uff09<\/a>\u3068\u3044\u3046\u8a00\u8449\u306f\u8033\u306b\u3057\u305f\u3053\u3068\u304c\u3042\u308b\u3067\u3057\u3087\u3046\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3051\u308bARP\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u985e\u4f3c\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u3069\u306e\u3088\u3046\u306b\u7570\u306a\u308b\u306e\u304b\u3082\u6c17\u306b\u306a\u308b\u3068\u3053\u308d\u3067\u3059\u3002<\/p>\n<aside role=\"note\" class=\"wp-block-kinsta-notice is-style-info\">\n            <h3>Info<\/h3>\n        <p>\u3053\u308c\u3089\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u306f\u3044\u304f\u3064\u304b\u306e\u985e\u4f3c\u70b9\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u5f79\u5272\u3092\u62c5\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u3001\u8a73\u3057\u304f\u3054\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<\/aside>\n\n<ul>\n<li><strong>DHCP\u3068ARP\u306e\u9055\u3044<\/strong>\u2500ARP\u304c\u5b58\u5728\u3059\u308b\u7406\u7531\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067IP\u30a2\u30c9\u30ec\u30b9\u304c\u5e38\u306b\u5909\u5316\u3057\u3001\u7d76\u3048\u9593\u306a\u304f\u518d\u5272\u308a\u5f53\u3066\u304c\u884c\u308f\u308c\u308b\u305f\u3081\u3002DHCP\u306f\u3001\u30db\u30b9\u30c8\u306b\u5bfe\u3057\u3066\u52d5\u7684\u306aIP\u30a2\u30c9\u30ec\u30b9\u3092\u8a2d\u5b9a\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3042\u308a\u3001\u3053\u306e\u5909\u5316\u3092\u62c5\u5f53\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u8907\u6570\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306b\u540c\u3058IP\u30a2\u30c9\u30ec\u30b9\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u306a\u3069\u306e\u7af6\u5408\u3092\u56de\u907f\u3059\u308b\u5f79\u5272\u3082\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>DNS\u3068ARP\u306e\u9055\u3044<\/strong>\u2500ARP\u304cIP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u3092\u7d10\u4ed8\u3051\u308b\u306e\u306b\u5bfe\u3057\u3066\u3001DNS\u306fIP\u30a2\u30c9\u30ec\u30b9\u3068<a href=\"https:\/\/kinsta.com\/jp\/blog\/how-to-buy-a-domain-name\/\">\u30c9\u30e1\u30a4\u30f3\u540d<\/a>\uff08\u4f8b\uff1akinsta.com\uff09\u3092\u7d10\u4ed8\u3051\u308b\u3082\u306e\u3067\u3059\u3002\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u306f\u3001\u30da\u30fc\u30b8\u3001\u753b\u50cf\u306a\u3069\u306e\u3059\u3079\u3066\u306e\u8981\u7d20\u3092\u30db\u30b9\u30c8\u3059\u308b\u305f\u3081\u306b\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-web-hosting\/\">\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc<\/a>\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u4ed6\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3068\u540c\u69d8\u3001\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u30b5\u30fc\u30d0\u30fc\u306b\u3082IP\u30a2\u30c9\u30ec\u30b9\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u969b\u306b\u306f\u3001\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30b5\u30fc\u30d0\u30fc\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u5165\u529b\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u300cwww.example.com\u300d\u306e\u3088\u3046\u306a<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-a-url\/\">URL<\/a>\u3092\u5165\u529b\u3059\u308b\u3060\u3051\u3067\u3001DNS\u30b5\u30fc\u30d0\u30fc\u304c\u4e00\u81f4\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3057\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/most-secure-browser\/\">\u30d6\u30e9\u30a6\u30b6<\/a>\u304c\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u306b\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u3092\u8981\u6c42\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<figure style=\"width: 547px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/DNS-links-domain.png\" alt=\"DNS\u306f\u30c9\u30e1\u30a4\u30f3\u540d\u3092IP\u30a2\u30c9\u30ec\u30b9\u306b\u7d10\u4ed8\u3051\u308b\u5f79\u5272\u3092\u62c5\u3046\uff08\u51fa\u5178: GeeksforGeeks\uff09\" width=\"547\" height=\"434\"><figcaption class=\"wp-caption-text\">DNS\u306f\u30c9\u30e1\u30a4\u30f3\u540d\u3092IP\u30a2\u30c9\u30ec\u30b9\u306b\u7d10\u4ed8\u3051\u308b\u5f79\u5272\u3092\u62c5\u3046\uff08<strong>\u51fa\u5178<\/strong>: <a href=\"https:\/\/www.geeksforgeeks.org\/working-of-domain-name-system-dns-server\/\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">GeeksforGeeks<\/a>\uff09<\/figcaption><\/figure>\n<h2>ARP\u306e\u7528\u9014\u3068\u7a2e\u985e<\/h2>\n<p>ARP\u306f\u4e00\u898b\u3072\u3068\u3064\u306e\u5927\u304d\u306a\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u3088\u3046\u306b\u601d\u3048\u307e\u3059\u304c\u3001\u8907\u6570\u306e\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure style=\"width: 776px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/Types-of-ARP.png\" alt=\"ARP\u306f\u4e3b\u306b4\u3064\u306e\u7a2e\u985e\u304c\u3042\u308b\uff08\u51fa\u5178: IPXO\uff09\" width=\"776\" height=\"716\"><figcaption class=\"wp-caption-text\">ARP\u306f\u4e3b\u306b4\u3064\u306e\u7a2e\u985e\u304c\u3042\u308b\uff08<strong>\u51fa\u5178<\/strong>: <a href=\"https:\/\/www.ipxo.com\/blog\/address-resolution-protocol\/\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">IPXO<\/a>\uff09<\/figcaption><\/figure>\n<p>ARP\u306b\u306f\u3001Proxy ARP\u3001Gratuitous ARP\uff08GARP\uff09\u3001Reverse ARP\uff08RARP\uff09\u3001Inverse ARP\uff08IARP\uff09\u3068\u3044\u30464\u3064\u306e\u7a2e\u985e\u304c\u3042\u308a\u3001\u305d\u308c\u305e\u308c\u306b\u7570\u306a\u308b\u7528\u9014\u304c\u3042\u308a\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3001\u305d\u308c\u305e\u308c\u306e\u7279\u5fb4\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3>Proxy ARP<\/h3>\n<p>Proxy ARP\u306f\u3001ARP\u3092\u8a2d\u5b9a\u3057\u305f\u30b9\u30a4\u30c3\u30c1\uff08\u30eb\u30fc\u30bf\u30fc\u306a\u3069\uff09\u304c\u3001\u305d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u5916\u306b\u3042\u308b\u30c7\u30d0\u30a4\u30b9\u3084\u30db\u30b9\u30c8\u304b\u3089\u306eARP\u30ea\u30af\u30a8\u30b9\u30c8\uff08MAC\u30a2\u30c9\u30ec\u30b9\u306e\u8981\u6c42\uff09\u3092\u51e6\u7406\u3059\u308b\u6a5f\u80fd\u3067\u3059\u3002\u30b9\u30a4\u30c3\u30c1\u306f\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u3068\u3057\u3066\u81ea\u8eab\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u9001\u4fe1\u3057\u3001\u305d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u3059\u3079\u3066\u306e\u30db\u30b9\u30c8\u306e\u300c\u4ee3\u7406\u4eba\u300d\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\n<figure style=\"width: 1538px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/Proxy-ARP.png\" alt=\"Proxy ARP\u2500\u30db\u30b9\u30c8\u306b\u4ee3\u308f\u3063\u3066\u30eb\u30fc\u30bf\u30fc\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u307e\u305f\u3050\u8981\u6c42\u306b\u5fdc\u3048\u308b\uff08\u51fa\u5178: Practical Networking\uff09\" width=\"1538\" height=\"342\"><figcaption class=\"wp-caption-text\">Proxy ARP\u2500\u30db\u30b9\u30c8\u306b\u4ee3\u308f\u3063\u3066\u30eb\u30fc\u30bf\u30fc\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u307e\u305f\u3050\u8981\u6c42\u306b\u5fdc\u3048\u308b\uff08<strong>\u51fa\u5178<\/strong>: <a href=\"https:\/\/www.practicalnetworking.net\/series\/arp\/proxy-arp\/\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">Practical Networking<\/a>\uff09<\/figcaption><\/figure>\n<p>\u7406\u89e3\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u56f3\u3067\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4e2d\u592e\u306b\u3042\u308b\u7dd1\u8272\u306e\u30eb\u30fc\u30bf\u30fc\u306f\u30012\u3064\u306e\u30ed\u30fc\u30ab\u30eb\u30a8\u30ea\u30a2\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u300110.0.0.0\/24\u306810.0.4.0\/24\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u30db\u30b9\u30c8B\u304c\u30db\u30b9\u30c8D\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u30db\u30b9\u30c8D\u304c\uff08\u30db\u30b9\u30c8A\u306e\u3088\u3046\u306b\uff09\u540c\u3058\u30ed\u30fc\u30ab\u30eb\u30a8\u30ea\u30a2\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306b\u3042\u308c\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5225\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306b\u5b58\u5728\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u4e00\u7b4b\u7e04\u3067\u306f\u3044\u304d\u307e\u305b\u3093\u3002\u30db\u30b9\u30c8B\u306f\u3069\u306e\u3088\u3046\u306b\u30db\u30b9\u30c8D\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3059\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u3053\u3053\u3067\u4e00\u5f79\u8cb7\u3046\u306e\u304c\u30eb\u30fc\u30bf\u30fc\u3067\u3059\u3002\u30db\u30b9\u30c8B\u304c\u30eb\u30fc\u30bf\u30fc\u306bARP\u30ea\u30af\u30a8\u30b9\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b\u3068\u3001\u30eb\u30fc\u30bf\u30fc\u304c\u305d\u308c\u306b\u5fdc\u7b54\u3057\u3001\u81ea\u8eab\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u9001\u308a\u8fd4\u3057\u307e\u3059\u3002\u30eb\u30fc\u30bf\u30fc\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3057\u305f\u30db\u30b9\u30c8B\u306f\u3001\u30db\u30b9\u30c8D\u306e\u300c\u4ee3\u7406\u4eba\u300d\u3068\u3057\u3066\u52d5\u4f5c\u3059\u308b\u30eb\u30fc\u30bf\u30fc\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n<p>Proxy ARP\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u4e00\u822c\u7684\u3067\u3042\u308a\u3001\u4f8b\u3048\u3070<a href=\"https:\/\/kinsta.com\/blog\/how-does-a-vpn-work\/\">VPN<\/a>\u63a5\u7d9a\u3084<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-a-firewall\/\">\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/a>\u306a\u3069\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Proxy ARP\u306b\u306f\u3044\u304f\u3064\u304b\u6b20\u70b9\u304c\u3042\u308a\u3001\u305d\u306e\u307b\u3068\u3093\u3069\u306f\u4e0d\u9069\u5207\u306a\u8a2d\u5b9a\u306b\u8d77\u56e0\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Proxy ARP\u306e\u307f\u3092\u6271\u3046\u5834\u5408\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5916\u306e\u30c7\u30d0\u30a4\u30b9\u304c\u4e0d\u9069\u5207\u306a\u8a2d\u5b9a\u306b\u6c17\u3065\u304b\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u3001\u8aa4\u3063\u305f\u5b9b\u5148\u306b\u30c7\u30fc\u30bf\u304c\u9001\u4fe1\u3055\u308c\u308b\u30ea\u30b9\u30af\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002Proxy ARP\u306f\u3001\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08DoS\uff09\u653b\u6483\u306b\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u3001\u5f8c\u307b\u3069\u3054\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h3>Gratuitous ARP\uff08GARP\uff09<\/h3>\n<p>Gratuitous ARP\u306f\u3001\u4e8b\u524d\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3055\u308c\u3066\u3044\u306a\u3044ARP\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u610f\u5473\u3057\u3001ARP\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u3059\u3079\u3066\u306e\u30db\u30b9\u30c8\u307e\u305f\u306f\u30c7\u30d0\u30a4\u30b9\u306bIP\u30a2\u30c9\u30ec\u30b9\u3068MAC\u30a2\u30c9\u30ec\u30b9\u306e\u5909\u63db\u3092\u52b9\u679c\u7684\u306b\u901a\u77e5\u3059\u308b\u6a5f\u80fd\u3067\u3059\u3002\u8a00\u3046\u306a\u308c\u3070\u3001\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u81ea\u5206\u306e\u9023\u7d61\u5148\u304c\u5909\u66f4\u3057\u305f\u3053\u3068\u3092\u7686\u306b\u4f1d\u3048\u308b\u300c\u4e00\u6589\u30e1\u30fc\u30eb\u300d\u3092\u9001\u4fe1\u3059\u308b\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure style=\"width: 575px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/Gratuitous-ARP.png\" alt=\"GARP\u2500MAC\u30a2\u30c9\u30ec\u30b9\u306e\u66f4\u65b0\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u901a\u77e5\" width=\"575\" height=\"295\"><figcaption class=\"wp-caption-text\">GARP\u2500MAC\u30a2\u30c9\u30ec\u30b9\u306e\u66f4\u65b0\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u901a\u77e5\uff08<strong>\u51fa\u5178<\/strong>: <a href=\"https:\/\/ipcisco.com\/lesson\/gratuitous-arp-ccie\/\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">IPCisco.com<\/a>\uff09<\/figcaption><\/figure>\n<p>Gratuitous ARP\u306b\u306f\u3044\u304f\u3064\u304b\u4fbf\u5229\u306a\u7528\u9014\u304c\u3042\u308a\u30011\u3064\u306f\u7279\u306b\u30c7\u30d0\u30a4\u30b9\u3084\u30ce\u30fc\u30c9\u304c\u65b0\u305f\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u305f\u969b\u3001ARP\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u30de\u30c3\u30d4\u30f3\u30b0\u3092\u66f4\u65b0\u3059\u308b\u3053\u3068\u3002\u65b0\u305f\u306a\u30c7\u30d0\u30a4\u30b9\u306e\u5834\u5408\u3001Gratuitous ARP\u304c\u30ed\u30fc\u30ab\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u4ed6\u306e\u3059\u3079\u3066\u306e\u30c7\u30d0\u30a4\u30b9\u3078\u306e\u500b\u5225\u306eARP\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u9001\u4fe1\u3068\u5fdc\u7b54\u3092\u56de\u907f\u3057\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u5197\u9577\u6027\u306e\u78ba\u4fdd\u3082\u91cd\u8981\u306a\u7528\u9014\u306e1\u3064\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u5197\u9577\u5316\u3055\u308c\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u3001 \u540c\u3058IP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u30642\u3064\u4ee5\u4e0a\u306e\u30eb\u30fc\u30bf\u30fc\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3069\u3061\u3089\u304b\u306e\u30eb\u30fc\u30bf\u30fc\u304c\u6545\u969c\u3057\u305f\u969b\u3001\u3082\u3046\u7247\u65b9\u306e\u30eb\u30fc\u30bf\u30fc\u304cGratuitous ARP\u3092\u9001\u4fe1\u3057\u3001\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u5148\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u901a\u77e5\u3057\u307e\u3059\u3002<\/p>\n<h3>Reverse ARP\uff08RARP\uff09<\/h3>\n<p>Reverse ARP\uff08RARP\uff09\u306f\u3001\u300c\u30ea\u30d0\u30fc\u30b9\u300d\u304b\u3089\u9023\u60f3\u3055\u308c\u308b\u3088\u3046\u306b\u3001MAC\u30a2\u30c9\u30ec\u30b9\u304b\u3089IP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002<\/p>\n<figure style=\"width: 609px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/Reverse-ARP.png\" alt=\"RARP\u2500\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3066\u81ea\u5206\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\uff08\u51fa\u5178: NetworkLessons\uff09\" width=\"609\" height=\"316\"><figcaption class=\"wp-caption-text\">RARP\u2500\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3066\u81ea\u5206\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\uff08<strong>\u51fa\u5178<\/strong>: <a href=\"https:\/\/networklessons.com\/cisco\/ccie-routing-switching-written\/rarp-reverse-arp\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">NetworkLessons<\/a>\uff09<\/figcaption><\/figure>\n<p>\u305d\u3082\u305d\u3082\u3001\u306a\u305c\u3053\u306e\u3088\u3046\u306a\u3053\u3068\u304c\u5fc5\u8981\u306b\u306a\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u30db\u30b9\u30c8\u306f\u3059\u3067\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u628a\u63e1\u3057\u3066\u3044\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<p>\u5b9f\u306f\u305d\u3046\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u4e2d\u306b\u306f\u3001IP\u60c5\u5831\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306e\u30e1\u30e2\u30ea\u3084\u30b9\u30da\u30fc\u30b9\u304c\u306a\u3044\u305f\u3081\u3001\u81ea\u8eab\u306eIP\u30a2\u30c9\u30ec\u30b9\u3055\u3048\u628a\u63e1\u3057\u3066\u3044\u306a\u3044\u30db\u30b9\u30c8\u3082\u5b58\u5728\u3057\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u306f\u3001\u901a\u5e38RARP\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002MAC\u30a2\u30c9\u30ec\u30b9\u3060\u3051\u304c\u6c38\u7d9a\u7684\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3001MAC\u30a2\u30c9\u30ec\u30b9\u4ee5\u5916\u306e\u60c5\u5831\u3092\u6301\u305f\u306a\u3044\u53ef\u80fd\u6027\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>Inverse ARP\uff08IARP\uff09<\/h3>\n<p>RARP\u3068\u540c\u69d8\u3001Inverse ARP\uff08IARP\u307e\u305f\u306fInARP\uff09\u3082MAC\u30a2\u30c9\u30ec\u30b9\u304b\u3089IP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u304c\u3001RARP\u3068\u7570\u306a\u308a\u3001IARP\u306f\u5f93\u6765\u306eARP\u3068\u307e\u3063\u305f\u304f\u540c\u3058\u3088\u3046\u306b\u52d5\u4f5c\u3057\u307e\u3059\u3002\u5f93\u6765\u306eARP\u3068\u306e\u9055\u3044\u306f\u3001IP\u30a2\u30c9\u30ec\u30b9\u3092MAC\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001MAC\u30a2\u30c9\u30ec\u30b9\u3092IP\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3059\u308b\u70b9\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>IARP\u306f\u3001DHCP\u306e\u5b58\u5728\u306b\u3088\u3063\u3066\u3001\u983b\u7e41\u306b\u5909\u5316\u3059\u308bIP\u30a2\u30c9\u30ec\u30b9\u306b\u7279\u306b\u6709\u52b9\u3067\u3059\u3002\u3042\u308b\u30db\u30b9\u30c8\u304cIP\u30a2\u30c9\u30ec\u30b9\u304c\u5909\u66f4\u3055\u308c\u305f\u4ed6\u306e\u30db\u30b9\u30c8\u3001\u307e\u305f\u306f\u30eb\u30fc\u30bf\u30fc\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3092\u77e5\u3063\u3066\u3044\u308b\u5834\u5408\u3001MAC\u30a2\u30c9\u30ec\u30b9\u3055\u3048\u308f\u304b\u3063\u3066\u3044\u308c\u3070\u3001\u65b0\u305f\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u53d6\u5f97\u3057\u3001IARP\u3092\u4f7f\u3063\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3068\u306f<\/h2>\n<p>ARP\u30dd\u30a4\u30ba\u30cb\u30f3\u30b0\u3068\u3057\u3066\u3082\u77e5\u3089\u308c\u308b<a href=\"https:\/\/kinsta.com\/blog\/ip-spoofing\/\">ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0<\/a>\u3068\u306f\u3001\u30cf\u30c3\u30ab\u30fc\u304c\u6a19\u7684\u3068\u3059\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u507d\u306eARP\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u3001\u81ea\u5206\u306eMAC\u30a2\u30c9\u30ec\u30b9\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u6b63\u5f53\u306aIP\u30a2\u30c9\u30ec\u30b9\u3092\u7d10\u4ed8\u3051\u3088\u3046\u3068\u3059\u308b\u624b\u6cd5\u3067\u3059\u3002<\/p>\n<figure style=\"width: 1600px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2023\/02\/ARP-spoofing.png\" alt=\"\u30cf\u30c3\u30ab\u30fc\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u508d\u53d7\u3059\u308b\u305f\u3081\u306b\u5b9f\u884c\u3059\u308bARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\uff08\u51fa\u5178: OKTA\uff09\" width=\"1600\" height=\"800\"><figcaption class=\"wp-caption-text\">\u30cf\u30c3\u30ab\u30fc\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u508d\u53d7\u3059\u308b\u305f\u3081\u306b\u5b9f\u884c\u3059\u308bARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\uff08<strong>\u51fa\u5178<\/strong>: <a href=\"https:\/\/www.okta.com\/identity-101\/arp-poisoning\/\" target=\"_blank\" rel=\"\u201cnoopener\u201d noopener noreferrer\">OKTA<\/a>\uff09<\/figcaption><\/figure>\n<p>ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u306b\u6210\u529f\u3059\u308b\u3068\u3001\u6b63\u898f\u306eIP\u30a2\u30c9\u30ec\u30b9\u3092\u6301\u3064\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306b\u5411\u3051\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u30cf\u30c3\u30ab\u30fc\u306b\u9001\u4fe1\u3055\u308c\u308b\u3088\u3046\u306b\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u60aa\u610f\u306e\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a<a href=\"https:\/\/kinsta.com\/blog\/zero-day-exploit\/\">\u30b5\u30a4\u30d0\u30fc\u653b\u6483<\/a>\u3092\u4ed5\u639b\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u4e2d\u9593\u8005\u653b\u6483\uff08MTM\uff09<\/h3>\n<p>\u4e2d\u9593\u8005\uff08MTM\uff09\u653b\u6483\u3068\u306f\u3001\u60aa\u610f\u3042\u308b\u7b2c\u4e09\u8005\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u76d7\u8074\u3057\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/password-managers\/\">\u30d1\u30b9\u30ef\u30fc\u30c9<\/a>\u3084\u9280\u884c\u60c5\u5831\u306a\u3069\u306e\u8cb4\u91cd\u306a\u30c7\u30fc\u30bf\u3092\u508d\u53d7\u3059\u308b\u653b\u6483\u3067\u3059\u3002ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u653b\u6483\u306e\u5834\u5408\u3001\u4e0d\u6b63\u306aARP\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u4f5c\u6210\u3057\u3001\u81ea\u5206\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u7d4c\u7531\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3057\u3001\u5bfe\u8c61\u306e\u53d7\u4fe1\u8005\u306b\u305d\u308c\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u3001\u4f55\u3082\u554f\u984c\u304c\u306a\u3044\u3088\u3046\u306b\u898b\u305b\u304b\u3051\u307e\u3059\u3002<\/p>\n<h3>\u30bb\u30c3\u30b7\u30e7\u30f3\u30cf\u30a4\u30b8\u30e3\u30c3\u30af<\/h3>\n<p>\u30bb\u30c3\u30b7\u30e7\u30f3\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u3068\u306f\u3001\u30cf\u30c3\u30ab\u30fc\u304c\u30e6\u30fc\u30b6\u30fc\u306e\u30bb\u30c3\u30b7\u30e7\u30f3ID\uff08\u30b5\u30a4\u30c8\u4e0a\u3067\u7279\u5b9a\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u6a29\u9650\u3092\u4e0e\u3048\u308b\u7279\u5225\u306a\u30c7\u30fc\u30bf\uff09\u3092\u76d7\u307f\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u4e57\u3063\u53d6\u308b\u884c\u70ba\u3067\u3059\u3002\u901a\u5e38\u3001\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306e\u30bb\u30c3\u30b7\u30e7\u30f3ID\u306f<a href=\"https:\/\/kinsta.com\/jp\/blog\/cookieless-future\/\">Cookie<\/a>\u306b\u8a18\u9332\u3055\u308c\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u30ed\u30b0\u30a4\u30f3\u72b6\u614b\u3092\u7dad\u6301\u3057\u305f\u308a\u3001\u4fdd\u5b58\u3057\u305f<a href=\"https:\/\/kinsta.com\/blog\/shopping-cart-abandonment\/\">\u30b7\u30e7\u30c3\u30d4\u30f3\u30b0\u30ab\u30fc\u30c8<\/a>\u3092\u518d\u5ea6\u958b\u3044\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3067\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3059\u308c\u3070\u3001\u30cf\u30c3\u30ab\u30fc\u306f\u7c21\u5358\u306b\u30bb\u30c3\u30b7\u30e7\u30f3ID\u3092\u76d7\u307f\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u306a\u308a\u3059\u307e\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30ed\u30b0\u30a4\u30f3\u3057\u305f\u307e\u307e\u306e\u9280\u884c\u53e3\u5ea7\u306a\u3069\u3001\u30e6\u30fc\u30b6\u30fc\u672c\u4eba\u306b\u8a31\u53ef\u3055\u308c\u308b\u3053\u3068\u304c\u3059\u3079\u3066\u5b9f\u884c\u53ef\u80fd\u306b\u306a\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30b5\u30fc\u30d3\u30b9\u59a8\u5bb3\uff08DoS\uff09<\/h3>\n<p>\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08DoS\uff09\u307e\u305f\u306f<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-a-ddos-attack\/\">\u5206\u6563\u578b\u30b5\u30fc\u30d3\u30b9\u62d2\u5426\uff08DDoS\uff09<\/a>\u653b\u6483\u306b\u306f\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u3068\u3001\u5927\u91cf\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3067\u5727\u8feb\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u306e2\u7a2e\u985e\u3042\u308a\u3001\u5f8c\u8005\u306e\u65b9\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n<p>\u3069\u3061\u3089\u3082ARP\u30b9\u30d7\u30fc\u30d5\u30a3\u30f3\u30b0\u3067\u5b9f\u73fe\u53ef\u80fd\u3067\u3001\u901a\u5e38\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u508d\u53d7\u3059\u308b\u3053\u3068\u3067\u3001\u610f\u56f3\u3057\u305f\u53d7\u4fe1\u8005\u3078\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30d6\u30ed\u30c3\u30af\u3057\u305f\u308a\u3001\u5358\u4e00\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3057\u305f\u308a\u3057\u307e\u3059\u3002<\/p>\n\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u4eca\u56de\u306f\u3001ARP\u306b\u3064\u3044\u3066\u5fb9\u5e95\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002ARP\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3044\u3066\u6700\u3082\u4e00\u822c\u7684\u304b\u3064\u6709\u7528\u306a\u30d7\u30ed\u30c8\u30b3\u30eb\u306e1\u3064\u3067\u3059\u3002ARP\u304c\u958b\u767a\u3055\u308c\u305f\u3053\u3068\u3067\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306f\u7269\u7406\u7684\u306aMAC\u30a2\u30c9\u30ec\u30b9\u3068\u5909\u5316\u3057\u7d9a\u3051\u308bIP\u30a2\u30c9\u30ec\u30b9\u3092\u7d10\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u4eca\u65e5\u666e\u53ca\u3057\u3066\u3044\u308b\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001ARP\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u8106\u5f31\u6027\u3084\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306b\u3064\u306a\u304c\u308b\u6050\u308c\u3082\u3002DDoS\u5bfe\u7b56\u306a\u3069\u306e\u512a\u308c\u305f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u3092\u5099\u3048\u305fKinsta\u306e<a 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