{"id":3853,"date":"2025-06-23T15:05:12","date_gmt":"2025-06-23T07:05:12","guid":{"rendered":"https:\/\/www.key-iot.com\/?p=3853"},"modified":"2025-06-23T15:05:12","modified_gmt":"2025-06-23T07:05:12","slug":"5-minutes-to-understand-how-a-router-works-and-its-main-components","status":"publish","type":"post","link":"https:\/\/www.key-iot.com\/jp\/blog\/5-minutes-to-understand-how-a-router-works-and-its-main-components\/","title":{"rendered":"5\u5206\u3067\u308f\u304b\u308b\u30eb\u30fc\u30bf\u30fc\u306e\u4ed5\u7d44\u307f\u3068\u4e3b\u306a\u69cb\u6210\u90e8\u54c1"},"content":{"rendered":"
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\"55d13c3c5faeb0e057dbdccf3ec0e62b\"<\/h3>\n<\/div>\n
\n
\n<\/div>\n
\n

01.\u00a0\u30eb\u30fc\u30bf\u30fc\u3068\u306f\uff1f<\/strong><\/h2>\n<\/div>\n
\u7c21\u5358\u306b\u8a00\u3046\u3068\u3001\u30eb\u30fc\u30bf\u30fc\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u6a5f\u80fd\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u76f8\u4e92\u63a5\u7d9a\u3092\u53ef\u80fd\u306b\u3059\u308b\u30c7\u30d0\u30a4\u30b9\u3067\u3042\u308b\u3002\u3055\u3089\u306b\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u306e\u901f\u5ea6\u3092\u8abf\u6574\u3057\u3001\u30b5\u30d6\u30cd\u30c3\u30c8\u3092\u5206\u96e2\u3057\u3001\u30a2\u30af\u30bb\u30b9\u30eb\u30fc\u30eb\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/span><\/div>\n
\u5b9a\u7fa9<\/strong>:A \u30eb\u30fc\u30bf\u30fc<\/strong><\/a> \u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u76f8\u4e92\u63a5\u7d9a\u3092\u53ef\u80fd\u306b\u3059\u308b\u30c7\u30d0\u30a4\u30b9\u3067\u3042\u308a\u3001\u6b21\u306e\u3088\u3046\u306a\u7528\u9014\u3067\u52d5\u4f5c\u3059\u308b\u3002\u00a0OSI\u30e2\u30c7\u30eb\u7b2c3\u5c64<\/strong>-\u305d\u306e\u00a0\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64<\/strong>.\u3053\u308c\u306f2\u3064\u306e\u91cd\u8981\u306a\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u63d0\u4f9b\u3059\u308b\uff1a\u00a0\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0<\/strong>\u00a0\u305d\u3057\u3066\u00a0\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0<\/strong>.<\/span><\/p>\n
    \n
  • \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0<\/strong>:\u30c7\u30fc\u30bf\u30fb\u30d1\u30b1\u30c3\u30c8\u304c\u9001\u4fe1\u5143\u304b\u3089\u5b9b\u5148\u307e\u3067\u306e\u7d4c\u8def\uff08\u30db\u30b9\u30c8\u9593\u306e\u6700\u9069\u306a\u4f1d\u9001\u7d4c\u8def\uff09\u3092\u6c7a\u5b9a\u3059\u308b\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u547c\u3070\u308c\u308b\u3002<\/li>\n
  • \u8ee2\u9001<\/strong>:\u30eb\u30fc\u30bf\u30fc\u306e\u5165\u529b\u30dd\u30fc\u30c8\u304b\u3089\u9069\u5207\u306a\u51fa\u529b\u30dd\u30fc\u30c8\u306b\u30c7\u30fc\u30bf\u30d1\u30b1\u30c3\u30c8\u3092\u8ee2\u9001\u3059\u308b\uff08\u3053\u308c\u306f\u30eb\u30fc\u30bf\u30fc\u5185\u90e8\u3067\u884c\u308f\u308c\u308b\uff09\u3002<\/li>\n<\/ul>\n<\/div>\n
    \n
    \n<\/div>\n
    \n

    02.\u00a0\u5178\u578b\u7684\u306a\u30eb\u30fc\u30bf\u30fc\u306e\u69cb\u9020<\/strong><\/h2>\n<\/div>\n
    (\u6ce8\uff1a\u539f\u6587\u3067\u8a00\u53ca\u3055\u308c\u3066\u3044\u308b\u56f3\u306f\u3053\u3053\u306b\u306f\u542b\u307e\u308c\u3066\u3044\u306a\u3044\uff09\u3002<\/em><\/span><\/div>\n
    \n
    \n<\/div>\n
    \n

    03.\u00a0\u30eb\u30fc\u30bf\u30fc\u306e\u4ed5\u7d44\u307f<\/strong><\/h2>\n<\/div>\n
    \n
      \n
    1. \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff08\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3001\u5236\u5fa1\u5c64\uff09<\/strong>:\n
        \n
      • \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30fb\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u9078\u629e\u30fb\u751f\u6210\u3057\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30fb\u30c6\u30fc\u30d6\u30eb\u306b\u8ffd\u52a0\u3059\u308b\u3002<\/li>\n
      • \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30fb\u30c6\u30fc\u30d6\u30eb\u306f\u30e1\u30e2\u30ea\u4e0a\u306e\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u30fb\u30a8\u30f3\u30b8\u30f3\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3055\u308c\u3001ASIC\u30c1\u30c3\u30d7\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u9818\u57df\u306b\u683c\u7d0d\u3055\u308c\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div>\n
        \n
          \n
        1. \u30d1\u30b1\u30c3\u30c8\u8ee2\u9001\uff08\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3001\u30c7\u30fc\u30bf\u5c64\uff09<\/strong>:\n
            \n
          • \u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u30ec\u30a4\u30e4\u30fc\u304c\u30d5\u30ec\u30fc\u30e0\u30d8\u30c3\u30c0\u3068\u30c8\u30ec\u30fc\u30e9\u3092\u53d6\u308a\u9664\u3044\u305f\u5f8c\u3001\u30d1\u30b1\u30c3\u30c8\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ec\u30a4\u30e4\u30fc\u306b\u9001\u3089\u308c\u308b\u3002<\/li>\n
          • \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ec\u30a4\u30e4\u30fc\u306fIP\u30d8\u30c3\u30c0\u30fc\u306e\u30ad\u30fc\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u3063\u3066\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u3092\u691c\u7d22\u3057\u3001\u51fa\u529b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u6c7a\u5b9a\u3059\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/div>\n
            \n
            \n<\/div>\n
            \n

            \"af96f4471a7fc3aee8588a22f2810203\"<\/h2>\n

            <\/h2>\n

            04.\u00a0\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30fb\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u8ee2\u9001\u30c6\u30fc\u30d6\u30eb<\/strong><\/h2>\n<\/div>\n
            \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30fb\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u8ee2\u9001\u30c6\u30fc\u30d6\u30eb\u306f\u3001\u305d\u306e\u30b5\u30a4\u30ba\u306b\u95a2\u4fc2\u306a\u304f\u30011\u30af\u30ed\u30c3\u30af\u30fb\u30b5\u30a4\u30af\u30eb\u5185\u3067\u691c\u7d22\u3067\u304d\u308b\u3002<\/span><\/div>\n
            \n
              \n
            • CAM\u30c6\u30fc\u30d6\u30eb<\/strong>:\n
                \n
              • \u30d0\u30a4\u30ca\u30ea\u30de\u30c3\u30c1\uff081\u307e\u305f\u306f0\uff09\u3092\u5b9f\u884c\u3059\u308b\u3002\u5b8c\u5168\u306b\u30de\u30c3\u30c1\u3059\u308b\u304b\u3001\u307e\u3063\u305f\u304f\u30de\u30c3\u30c1\u3057\u306a\u3044\u304b\u306e\u3069\u3061\u3089\u304b\u3067\u3059\u3002<\/li>\n
              • MAC\u30a2\u30c9\u30ec\u30b9\u306e\u691c\u7d22\u306b\u4f7f\u7528\u3055\u308c\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n
                \n
                  \n
                • TCAM\u8ee2\u9001\u30c6\u30fc\u30d6\u30eb<\/strong>:\n
                    \n
                  • 3\u5024\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u884c\u3046\uff080\u30011\u3001\u307e\u305f\u306f \"don't care\"\uff09\u3002<\/li>\n
                  • \u6b63\u78ba\u306a\u4e00\u81f4\u304b\u3089\u4e0d\u6b63\u78ba\u306a\u4e00\u81f4\u307e\u3067\u4e26\u3079\u66ff\u3048\u3002<\/li>\n
                  • \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30c6\u30fc\u30d6\u30eb\u30dd\u30ea\u30b7\u30fc\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30de\u30c3\u30c1\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30eb\u30fc\u30eb\u30de\u30c3\u30c1\u30f3\u30b0\u306b\u4f7f\u7528\u3055\u308c\u308b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n
                    \n
                    \n<\/div>\n
                    \n

                    05.\u00a0NP\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30fb\u30d7\u30ed\u30bb\u30c3\u30b5\uff09\u30c1\u30c3\u30d7<\/strong><\/h2>\n<\/div>\n
                    NP\u30c1\u30c3\u30d7\u306f\u30d7\u30ed\u30b0\u30e9\u30de\u30d6\u30eb\u3067\u3001\u8907\u6570\u306e\u30b5\u30fc\u30d3\u30b9\u306e\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u51e6\u7406\u3092\u540c\u6642\u306b\u9ad8\u901f\u5316\u3067\u304d\u308b\u3002NP\u30c1\u30c3\u30d7\u306e\u767b\u5834\u4ee5\u524d\u306f\u3001\u30eb\u30fc\u30bf\u30fc\u306f\u7279\u6b8a\u306a\u6a5f\u5668\u3060\u3063\u305f\u3002NP\u30c1\u30c3\u30d7\u306b\u3088\u3063\u3066\u00a0\u5168\u30b5\u30fc\u30d3\u30b9\u30fb\u30eb\u30fc\u30bf\u30fc<\/strong>\u00a0\u304c\u53ef\u80fd\u306b\u306a\u3063\u305f\u3002<\/span><\/div>\n
                    ASIC\u306b\u5bfe\u3059\u308bNP\u306e\u5229\u70b9<\/strong>:<\/span><\/p>\n
                      \n
                    • \u3088\u308a\u9ad8\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong>:\u6570\u5341\u500b\u306eCPU\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30fb\u30b3\u30d7\u30ed\u30bb\u30c3\u30b5\u3001\u30a2\u30af\u30bb\u30e9\u30ec\u30fc\u30bf\u3092\u7d71\u5408\u3002\u8f3b\u8f33\u7ba1\u7406\u3084\u30ad\u30e5\u30fc\u30fb\u30b9\u30b1\u30b8\u30e5\u30fc\u30ea\u30f3\u30b0\u306a\u3069\u306e\u8907\u96d1\u306aQoS\u6a5f\u80fd\u3092\u4f7f\u3063\u3066\u3082\u3001\u56de\u7dda\u901f\u5ea6\u306e\u8ee2\u9001\uff08\u300c\u30cf\u30fc\u30c9\u30fb\u30d5\u30a9\u30ef\u30fc\u30c7\u30a3\u30f3\u30b0\u300d\uff09\u3092\u5b9f\u73fe\u3067\u304d\u308b\u3002<\/li>\n
                    • \u3088\u308a\u5927\u304d\u306a\u67d4\u8edf\u6027<\/strong>:\u30d7\u30ed\u30b0\u30e9\u30de\u30d6\u30eb\u30fb\u30e6\u30fc\u30b6\u30fc\u30fb\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u3088\u308a\u3001\u67d4\u8edf\u306a\u62e1\u5f35\u304c\u53ef\u80fd\u3002<\/li>\n
                    • \u5f37\u529b\u306a\u30b5\u30fc\u30d3\u30b9\u30fb\u30b5\u30dd\u30fc\u30c8<\/strong>:\u65b0\u3057\u3044\u4ed8\u52a0\u4fa1\u5024\u30b5\u30fc\u30d3\u30b9\uff08MPLS\u3001QoS\u3001\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\u306a\u3069\uff09\u3092\u8fc5\u901f\u306b\u30b5\u30dd\u30fc\u30c8\u3002<\/li>\n
                    • \u4fbf\u5229\u306a\u7ba1\u7406\u3068\u958b\u767a<\/strong>:\u4e8c\u6b21\u958b\u767a\u306e\u30b5\u30a4\u30af\u30eb\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3002<\/li>\n
                    • IPv6\u306e\u4e92\u63db\u6027<\/strong>:\u30ea\u30b6\u30fc\u30d6\u30c9IPv6\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306f\u3001\u30b9\u30e0\u30fc\u30ba\u306a\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3092\u53ef\u80fd\u306b\u3059\u308b\u3002<\/li>\n
                    • \u9ad8\u3044\u4fe1\u983c\u6027<\/strong>:\u30c1\u30c3\u30d7\u306f\u88fd\u9020\u524d\u306b\u53b3\u3057\u3044\u75b2\u52b4\u8a66\u9a13\u3092\u53d7\u3051\u308b\u305f\u3081\u3001\u96fb\u6c17\u901a\u4fe1\u30b0\u30ec\u30fc\u30c9\u306e\u6a5f\u5668\u958b\u767a\u306b\u9069\u3057\u3066\u3044\u308b\u3002<\/li>\n<\/ul>\n<\/div>\n
                      \n
                      \n<\/div>\n
                      \n

                      06.\u00a0\u591a\u6bb5\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u69cb\u9020\u30eb\u30fc\u30bf\u30fc<\/strong><\/h2>\n<\/div>\n
                      \u591a\u6bb5\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u69cb\u9020\u306f\u3001\u76f8\u4e92\u306b\u63a5\u7d9a\u3055\u308c\u305f\u8907\u6570\u306e\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30fb\u30e6\u30cb\u30c3\u30c8\u304b\u3089\u69cb\u6210\u3055\u308c\u308b\u3002\u5404\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30fb\u30e6\u30cb\u30c3\u30c8\u306f\u3001\u6a19\u6e96\u7684\u306a\u30b9\u30a4\u30c3\u30c1\u306b\u4f3c\u305f\u5165\u51fa\u529b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u4e00\u5f0f\u3092\u6301\u3061\u3001\u5165\u51fa\u529b\u63a5\u7d9a\u3092\u63d0\u4f9b\u3059\u308b\u3002<\/span><\/div>\n
                      \n
                      \n<\/div>\n
                      \n

                      07.\u00a0\u30af\u30e9\u30b9\u30bf\u30fb\u30eb\u30fc\u30bf\u30fc<\/strong><\/h2>\n<\/div>\n
                      \u30af\u30e9\u30b9\u30bf\u30fb\u30eb\u30fc\u30bf\u30fc\u306f\u3001\u8907\u6570\u306e\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u30fb\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3068\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30fb\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u3092\u542b\u3080\u8907\u6570\u306e\u30eb\u30fc\u30bf\u30fc\u30fb\u30ce\u30fc\u30c9\u3067\u69cb\u6210\u3055\u308c\u308b\u3002<\/span><\/p>\n
                        \n
                      • \u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u69cb\u9020\u306f\u3001\u8907\u6570\u306e\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u69cb\u9020\u3092\u96c6\u7d04\u3057\u3001\u6b21\u306e\u3088\u3046\u306a\u6a5f\u80fd\u3092\u63d0\u4f9b\u3059\u308b\u3002\u00a0\u5206\u6563\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/strong>\u00a0\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3001\u30b5\u30a4\u30ba\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u3082\u306e\u3002<\/li>\n
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                        01.\u00a0What Is a Router? In simple terms, a router is a device that enables network interconnection with routing and forwarding functions. Additionally, it can adapt subnet speeds, isolate subnets, and define access rules. Definition: A router is a device that enables network interconnection and operates at the\u00a0third layer of the OSI model\u2014the\u00a0network layer. It provides two key mechanisms:\u00a0routing\u00a0and\u00a0forwarding. Routing: Determines the path a data packet takes from the source to the destination (the optimal transmission path between hosts). This process is called routing. Forwarding: Transfers data packets from the router’s input port to the appropriate output port (this happens internally within the router). 02.\u00a0Typical Router Structure (Note: The diagram mentioned […]<\/p>\n","protected":false},"author":1,"featured_media":3857,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false,"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"metadata":{"classic-editor-remember":["classic-editor"],"_edit_lock":["1750670703:1"],"_edit_last":["1"],"_thumbnail_id":["3857"],"themepark_seo_title":["5 Minutes to Understand How a Router Works and Its Main Components"],"themepark_seo_description":["In simple terms, a router is a device that enables network interconnection with routing and forwarding functions. 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