{"id":5534,"date":"2026-02-24T21:10:34","date_gmt":"2026-02-24T21:10:34","guid":{"rendered":"https:\/\/securitybriefing.net\/?p=5534"},"modified":"2026-02-27T21:17:57","modified_gmt":"2026-02-27T21:17:57","slug":"lan%e3%82%b1%e3%83%bc%e3%83%96%e3%83%ab%e3%81%a8%e3%81%af-%e5%ae%9a%e7%be%a9-%e7%a8%ae%e9%a1%9e-%e4%bd%bf%e7%94%a8%e6%b3%95-%e4%bb%95%e7%b5%84%e3%81%bf","status":"publish","type":"post","link":"https:\/\/securitybriefing.net\/ja\/%e3%83%8d%e3%83%83%e3%83%88%e3%83%af%e3%83%bc%e3%82%af\/lan%e3%82%b1%e3%83%bc%e3%83%96%e3%83%ab%e3%81%a8%e3%81%af-%e5%ae%9a%e7%be%a9-%e7%a8%ae%e9%a1%9e-%e4%bd%bf%e7%94%a8%e6%b3%95-%e4%bb%95%e7%b5%84%e3%81%bf\/","title":{"rendered":"LAN\u30b1\u30fc\u30d6\u30eb\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f\u5b9a\u7fa9\u3001\u7a2e\u985e\u3001\u7528\u9014\u3001\u304a\u3088\u3073\u305d\u306e\u4ed5\u7d44\u307f"},"content":{"rendered":"<p>LAN\u30b1\u30fc\u30d6\u30eb\u306f\u3001\u30ed\u30fc\u30ab\u30eb\u30a8\u30ea\u30a2\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u7269\u7406\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b1\u30fc\u30d6\u30eb\u3067\u3059\u3002\u307b\u3068\u3093\u3069\u306e\u73fe\u4ee3\u306e\u74b0\u5883\u3067\u306f\u3001LAN\u30b1\u30fc\u30d6\u30eb\u306f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u3001\u30eb\u30fc\u30bf\u30fc\u3001\u30b9\u30a4\u30c3\u30c1\u3001\u30d7\u30ea\u30f3\u30bf\u30fc\u3001\u30b5\u30fc\u30d0\u30fc\u3001\u304a\u3088\u3073\u305d\u306e\u4ed6\u306e\u30c7\u30d0\u30a4\u30b9\u9593\u3067\u306e\u9ad8\u901f\u30c7\u30fc\u30bf\u4f1d\u9001\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u305f\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30b1\u30fc\u30d6\u30eb\u3067\u3059\u3002\u7121\u7dda\u63a5\u7d9a\u3068\u306f\u7570\u306a\u308a\u3001\u6709\u7ddaLAN\u63a5\u7d9a\u306f\u3088\u308a\u9ad8\u3044\u5b89\u5b9a\u6027\u3001\u4e00\u8cab\u3057\u305f\u901f\u5ea6\u3001\u304a\u3088\u3073\u5e72\u6e09\u306e\u8efd\u6e1b\u3092\u63d0\u4f9b\u3057\u3001\u5bb6\u5ead\u304a\u3088\u3073\u30d3\u30b8\u30cd\u30b9\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306b\u3068\u3063\u3066\u4e0d\u53ef\u6b20\u3067\u3059\u3002.<\/p>\n\n\n\n<p>LAN\u30b1\u30fc\u30d6\u30eb\u304c\u4f55\u3067\u3042\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001LAN\u3068\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e\u9055\u3044\u3092\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002LAN\u306f\u30ed\u30fc\u30ab\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u81ea\u4f53\u3092\u6307\u3057\u3001\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306f\u305d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u901a\u3058\u3066\u30c7\u30fc\u30bf\u3092\u4f1d\u9001\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u6280\u8853\u3068\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306fIEEE 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<a href=\"https:\/\/securitybriefing.net\/ja\/%e3%83%af%e3%82%a4%e3%83%95%e3%82%a1%e3%82%a4\/\">WiFi\u63a5\u7d9a<\/a>. \u3002WiFi\u306f\u67d4\u8edf\u6027\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001\u6709\u7ddaLAN\u63a5\u7d9a\u306f\u8fd1\u304f\u306e\u30c7\u30d0\u30a4\u30b9\u3084\u58c1\u304b\u3089\u306e\u5e72\u6e09\u3092\u6e1b\u5c11\u3055\u305b\u3001\u5168\u4f53\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u4fe1\u983c\u6027\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u5411\u4e0a\u3055\u305b\u307e\u3059\u3002.<\/p>\n\n\n<h2 class=\"wp-block-heading\" 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id=\"rj45-connectors-ports-and-patch-cables\">RJ45\u30b3\u30cd\u30af\u30bf\u3001\u30dd\u30fc\u30c8\u3001\u304a\u3088\u3073\u30d1\u30c3\u30c1\u30b1\u30fc\u30d6\u30eb<\/h2>\n\n\n<p>RJ45\u30b3\u30cd\u30af\u30bf\u306f\u3001\u3059\u3079\u3066\u306e\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30b1\u30fc\u30d6\u30eb\u306e\u91cd\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30b3\u30cd\u30af\u30bf\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30dd\u30fc\u30c8\u306b\u30b1\u30fc\u30d6\u30eb\u3092\u5dee\u3057\u8fbc\u3080\u3053\u3068\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u5404\u30c7\u30d0\u30a4\u30b9\u306b\u306f\u901a\u5e38\u3001LAN\u306b\u76f4\u63a5\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e1\u3064\u4ee5\u4e0a\u306e\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30dd\u30fc\u30c8\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u30b9\u30a4\u30c3\u30c1\u306b\u306f\u3001\u5358\u4e00\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u6570\u5341\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u8907\u6570\u306e\u30dd\u30fc\u30c8\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002.<\/p>\n\n\n\n<p>\u30d1\u30c3\u30c1\u30b1\u30fc\u30d6\u30eb\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u3092\u58c1\u306e\u30b3\u30f3\u30bb\u30f3\u30c8\u307e\u305f\u306f\u30b9\u30a4\u30c3\u30c1\u3084\u30eb\u30fc\u30bf\u30fc\u306b\u76f4\u63a5\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u77ed\u3044LAN\u30b1\u30fc\u30d6\u30eb\u3067\u3059\u3002\u30d1\u30c3\u30c1\u30b1\u30fc\u30d6\u30eb\u306f\u901a\u5e38\u3001\u4e21\u7aef\u306bRJ45\u30b3\u30cd\u30af\u30bf\u3092\u5099\u3048\u3066\u304a\u308a\u3001\u69cb\u9020\u5316\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3067\u4e00\u822c\u7684\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u30d1\u30c3\u30c1\u30d1\u30cd\u30eb\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u30eb\u30fc\u30e0\u3084\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u8907\u6570\u306e\u30d1\u30c3\u30c1\u30b1\u30fc\u30d6\u30eb\u63a5\u7d9a\u3092\u6574\u7406\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u30b3\u30cd\u30af\u30bf\u3068\u30d7\u30e9\u30b0\u306f\u9069\u5207\u306b\u5727\u7740\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u614e\u91cd\u306a\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u304c\u91cd\u8981\u3067\u3059\u3002\u63a5\u7d9a\u304c\u4e0d\u5341\u5206\u306a\u5834\u5408\u3001\u4fe1\u53f7\u306e\u52a3\u5316\u3084\u4e0d\u5b89\u5b9a\u306a\u30c7\u30fc\u30bf\u4f1d\u9001\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u96fb\u6c17\u5e72\u6e09\u304c\u6fc0\u3057\u3044\u74b0\u5883\u3067\u306f\u3001\u30b7\u30fc\u30eb\u30c9\u30b1\u30fc\u30d6\u30eb\u3068\u30b7\u30fc\u30eb\u30c9\u30b3\u30cd\u30af\u30bf\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u4fe1\u983c\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"lan-vs-wifi-in-modern-networks\">\u73fe\u4ee3\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u304a\u3051\u308bLAN\u5bfeWiFi<\/h2>\n\n\n<p>WiFi\u304c\u6a19\u6e96\u7684\u306a\u7121\u7dda\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u306a\u3063\u305f\u4e00\u65b9\u3067\u3001LAN\u30b1\u30fc\u30d6\u30eb\u306f\u5b89\u5b9a\u3057\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u305f\u3081\u306e\u597d\u307e\u3057\u3044\u30aa\u30d7\u30b7\u30e7\u30f3\u3068\u3057\u3066\u6b8b\u3063\u3066\u3044\u307e\u3059\u3002\u7121\u7dda\u63a5\u7d9a\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u5e72\u6e09\u3084\u4fe1\u53f7\u5f37\u5ea6\u306e\u5909\u52d5\u306b\u5bfe\u3057\u3066\u3088\u308a\u8106\u5f31\u3067\u3059\u3002\u305d\u308c\u306b\u5bfe\u3057\u3066\u3001\u6709\u7dda\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30b1\u30fc\u30d6\u30eb\u306f\u4e00\u8cab\u3057\u305f\u30c7\u30fc\u30bf\u4f1d\u9001\u3068\u4e88\u6e2c\u53ef\u80fd\u306a\u901f\u5ea6\u3092\u7dad\u6301\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u30b5\u30fc\u30d0\u30fc\u9593\u306e\u30af\u30e9\u30a6\u30c9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u30b2\u30fc\u30e0\u3001\u5927\u5bb9\u91cf\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u306a\u3069\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306b\u306f\u3001\u6709\u7ddaLAN\u63a5\u7d9a\u304c\u6e2c\u5b9a\u53ef\u80fd\u306a\u5229\u70b9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u9ad8\u7cbe\u7d30\u30d3\u30c7\u30aa\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306a\u3069 <a href=\"https:\/\/spacemov.co\">\u30b9\u30da\u30fc\u30b9\u30e0\u30fc\u30d6.co<\/a> \u306f\u3001\u5909\u52d5\u3059\u308b\u7121\u7dda\u4fe1\u53f7\u3068\u6bd4\u8f03\u3057\u3066\u3001\u6709\u7dda\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u63a5\u7d9a\u304c\u63d0\u4f9b\u3059\u308b\u4e00\u8cab\u3057\u305f\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u3068\u4f4e\u9045\u5ef6\u306e\u6069\u6075\u3092\u7279\u306b\u53d7\u3051\u307e\u3059\u3002.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"ethernet-standards-and-network-protocols\">\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u6a19\u6e96\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb<\/h2>\n\n\n<p>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u6280\u8853\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5168\u4f53\u3067\u30c7\u30fc\u30bf\u4f1d\u9001\u304c\u3069\u306e\u3088\u3046\u306b\u884c\u308f\u308c\u308b\u304b\u3092\u5b9a\u7fa9\u3059\u308bIEEE 802.3\u6a19\u6e96\u306b\u5f93\u3044\u307e\u3059\u3002\u69cb\u9020\u5316\u914d\u7dda\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u3001\u9069\u5207\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001\u30b1\u30fc\u30d6\u30eb\u9577\u306e\u5236\u9650\u3001\u304a\u3088\u3073\u4e92\u63db\u6027\u3092\u4fdd\u8a3c\u3059\u308b\u305f\u3081\u306bTIA\/EIA-568\u6a19\u6e96\u306b\u5f93\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6a19\u6e96\u306f\u3001\u4fe1\u983c\u6027\u306e\u3042\u308b\u30c7\u30fc\u30bf\u4ea4\u63db\u306e\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3082\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u304c\u3069\u306e\u3088\u3046\u306b\u901a\u4fe1\u3057\u3001\u30a8\u30e9\u30fc\u3092\u691c\u51fa\u3057\u3001\u4f1d\u9001\u4e2d\u306b\u540c\u671f\u3092\u7dad\u6301\u3059\u308b\u304b\u3092\u7ba1\u7406\u3057\u307e\u3059\u3002\u8a8d\u8b58\u3055\u308c\u305f\u6a19\u6e96\u306b\u5f93\u3046\u3053\u3068\u306f\u3001\u30eb\u30fc\u30bf\u30fc\u3001\u30b9\u30a4\u30c3\u30c1\u3001\u30d7\u30ea\u30f3\u30bf\u30fc\u3001\u30b5\u30fc\u30d0\u30fc\u9593\u3067\u306e\u9577\u671f\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u5b89\u5b9a\u6027\u3068\u4e92\u63db\u6027\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"copper-vs-fiber-lan-connections\">\u9285\u5bfe\u30d5\u30a1\u30a4\u30d0\u30fcLAN\u63a5\u7d9a<\/h2>\n\n\n<p>\u307b\u3068\u3093\u3069\u306eLAN\u30b1\u30fc\u30d6\u30eb\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u3001\u30b3\u30b9\u30c8\u52b9\u7387\u304c\u9ad8\u304f\u5c55\u958b\u304c\u5bb9\u6613\u306a\u305f\u3081\u3001\u30c4\u30a4\u30b9\u30c8\u30da\u30a2\u9285\u914d\u7dda\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u9285\u30b1\u30fc\u30d6\u30eb\u306f\u3001\u901a\u5e38\u306e\u30aa\u30d5\u30a3\u30b9\u304a\u3088\u3073\u4f4f\u5b85\u8ddd\u96e2\u3067\u5f37\u529b\u306a\u4fe1\u53f7\u4f1d\u9001\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u30d5\u30a1\u30a4\u30d0\u30fc\u30b1\u30fc\u30d6\u30eb\u306f\u5927\u5e45\u306b <a href=\"https:\/\/www.lenovo.com\/us\/en\/glossary\/bandwidth\/?srsltid=AfmBOor3DjaWMevCN-N8AoOPNa4Z5UMdvHCynQzGxDQ5Lyh4---jN7gt\">\u9ad8\u3044\u5e2f\u57df\u5e45<\/a> \u3068\u9577\u3044\u4f1d\u9001\u8ddd\u96e2\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30d0\u30fc\u306f\u96fb\u6c17\u4fe1\u53f7\u306e\u4ee3\u308f\u308a\u306b\u5149\u3092\u4f7f\u7528\u3057\u3001\u96fb\u78c1\u5e72\u6e09\u306b\u5bfe\u3057\u3066\u514d\u75ab\u304c\u3042\u308a\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30d0\u30fc\u306f\u3001\u5efa\u7269\u9593\u3001\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u3001\u307e\u305f\u306f\u5927\u898f\u6a21\u306a\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b3\u30a2\u9593\u306e\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u63a5\u7d9a\u3067\u3088\u304f\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u30d5\u30a1\u30a4\u30d0\u30fc\u306f\u3088\u308a\u9ad8\u3044\u901f\u5ea6\u3068\u9577\u3044\u5230\u9054\u8ddd\u96e2\u3092\u63d0\u4f9b\u3057\u307e\u3059\u304c\u3001\u9285LAN\u30b1\u30fc\u30d6\u30eb\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u30ed\u30fc\u30ab\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u500b\u3005\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u30b9\u30a4\u30c3\u30c1\u3084\u30eb\u30fc\u30bf\u30fc\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u6a19\u6e96\u3068\u3057\u3066\u6b8b\u3063\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"installation-best-practices-and-interference-control\">\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u5e72\u6e09\u5236\u5fa1<\/h2>\n\n\n<p>\u9069\u5207\u306aLAN\u30b1\u30fc\u30d6\u30eb\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u3001\u9577\u671f\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u30b1\u30fc\u30d6\u30eb\u306f\u92ed\u304f\u66f2\u3052\u305f\u308a\u3001\u304d\u3064\u304f\u5727\u7e2e\u3057\u305f\u308a\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u5185\u90e8\u306e\u9285\u30da\u30a2\u3092\u640d\u50b7\u3057\u3001\u4fe1\u53f7\u3092\u5f31\u3081\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u6b63\u3057\u3044\u66f2\u3052\u534a\u5f84\u3092\u7dad\u6301\u3057\u3001\u30b1\u30fc\u30d6\u30eb\u3092\u56fa\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30cd\u30af\u30bf\u3068\u30d7\u30e9\u30b0\u3078\u306e\u30b9\u30c8\u30ec\u30b9\u3092\u9632\u304e\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u5de5\u696d\u7528\u307e\u305f\u306f\u96fb\u6c17\u304c\u591a\u3044\u74b0\u5883\u3067\u306f\u3001\u30b7\u30fc\u30eb\u30c9\u30b1\u30fc\u30d6\u30eb\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u5e72\u6e09\u3092\u6e1b\u5c11\u3055\u305b\u307e\u3059\u3002\u30b7\u30fc\u30eb\u30c9LAN\u30b1\u30fc\u30d6\u30eb\u306e\u8a2d\u8a08\u306b\u306f\u3001\u5916\u90e8\u306e\u96fb\u6c17\u30ce\u30a4\u30ba\u304b\u3089\u4fe1\u53f7\u4f1d\u9001\u3092\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306e\u8ffd\u52a0\u306e\u7d76\u7e01\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u6574\u7406\u3055\u308c\u305f\u30d1\u30c3\u30c1\u30d1\u30cd\u30eb\u3068\u660e\u78ba\u306b\u30e9\u30d9\u30eb\u4ed8\u3051\u3055\u308c\u305f\u30d1\u30c3\u30c1\u30b1\u30fc\u30d6\u30eb\u63a5\u7d9a\u306f\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3092\u7c21\u7d20\u5316\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p>\u6b63\u3057\u3044\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u3001\u5404\u30b1\u30fc\u30d6\u30eb\u304c\u6700\u9069\u306a\u901f\u5ea6\u3001\u4e00\u8cab\u3057\u305f\u4f1d\u9001\u3001\u304a\u3088\u3073\u5b89\u5b9a\u3057\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"why-lan-cables-remain-essential\">\u306a\u305cLAN\u30b1\u30fc\u30d6\u30eb\u304c\u4f9d\u7136\u3068\u3057\u3066\u91cd\u8981\u3067\u3042\u308b\u304b<\/h2>\n\n\n<p>\u7121\u7dda\u6280\u8853\u306e\u9032\u6b69\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001LAN\u30b1\u30fc\u30d6\u30eb\u306f\u73fe\u4ee3\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u306b\u3068\u3063\u3066\u57fa\u672c\u7684\u306a\u3082\u306e\u3067\u3059\u3002\u3059\u3079\u3066\u306e\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3001\u30b5\u30fc\u30d0\u30fc\u30eb\u30fc\u30e0\u3001\u304a\u3088\u3073\u69cb\u9020\u5316\u30aa\u30d5\u30a3\u30b9\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u3092\u4fe1\u983c\u6027\u9ad8\u304f\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30b1\u30fc\u30d6\u30eb\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002LAN\u63a5\u7d9a\u306f\u3001\u30d7\u30ea\u30f3\u30bf\u30fc\u3001\u30b5\u30fc\u30d0\u30fc\u3001\u30eb\u30fc\u30bf\u30fc\u3001\u30b9\u30a4\u30c3\u30c1\u3001\u304a\u3088\u3073\u5b89\u5b9a\u3057\u305f\u9ad8\u901f\u30c7\u30fc\u30bf\u4f1d\u9001\u3092\u5fc5\u8981\u3068\u3059\u308b\u305d\u306e\u4ed6\u306e\u91cd\u8981\u306a\u30c7\u30d0\u30a4\u30b9\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p>LAN\u30b1\u30fc\u30d6\u30eb\u6280\u8853\u306f\u53b3\u683c\u306a\u6a19\u6e96\u3068\u5b9f\u8a3c\u6e08\u307f\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u5f93\u3046\u305f\u3081\u3001\u30c0\u30a6\u30f3\u30bf\u30a4\u30e0\u304c\u8a31\u5bb9\u3067\u304d\u306a\u3044\u74b0\u5883\u3067\u4e88\u6e2c\u53ef\u80fd\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u63d0\u4f9b\u3057\u7d9a\u3051\u307e\u3059\u3002.<\/p>\n\n\n<h2 class=\"wp-block-heading\" id=\"final-thoughts\">\u6700\u7d42\u7684\u306a\u611f\u60f3<\/h2>\n\n\n<p>LAN\u30b1\u30fc\u30d6\u30eb\u306f\u5358\u306a\u308b\u30ef\u30a4\u30e4\u30fc\u4ee5\u4e0a\u306e\u3082\u306e\u3067\u3059\u3002\u305d\u308c\u306f\u3042\u3089\u3086\u308b <a href=\"https:\/\/securitybriefing.net\/ja\/%e3%83%8d%e3%83%83%e3%83%88%e3%83%af%e3%83%bc%e3%82%af\/%e3%83%8d%e3%83%83%e3%83%88%e3%83%af%e3%83%bc%e3%82%af%e3%81%af%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e6%a9%9f%e8%83%bd%e3%81%99%e3%82%8b%e3%81%8b\/\">\u4fe1\u983c\u6027\u306e\u3042\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af<\/a>, \u306e\u4e2d\u6838\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3042\u308a\u3001\u63a5\u7d9a\u3055\u308c\u305f\u30c7\u30d0\u30a4\u30b9\u9593\u3067\u5b89\u5168\u3067\u9ad8\u901f\u306a\u30c7\u30fc\u30bf\u4f1d\u9001\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u9285\u307e\u305f\u306f\u30d5\u30a1\u30a4\u30d0\u30fc\u3001\u30d1\u30c3\u30c1\u30b1\u30fc\u30d6\u30eb\u307e\u305f\u306f\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306e\u3044\u305a\u308c\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3067\u3082\u3001\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u6280\u8853\u306f\u30eb\u30fc\u30bf\u30fc\u3001\u30b9\u30a4\u30c3\u30c1\u3001\u30d7\u30ea\u30f3\u30bf\u30fc\u3001\u304a\u3088\u3073\u30b5\u30fc\u30d0\u30fc\u9593\u3067\u4e00\u8cab\u3057\u305f\u901a\u4fe1\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<p>LAN\u30b1\u30fc\u30d6\u30eb\u304c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3001RJ45\u30b3\u30cd\u30af\u30bf\u304c\u5404\u30dd\u30fc\u30c8\u306b\u3069\u306e\u3088\u3046\u306b\u53d6\u308a\u4ed8\u3051\u3089\u308c\u308b\u304b\u3001\u6a19\u6e96\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3092\u3069\u306e\u3088\u3046\u306b\u30ac\u30a4\u30c9\u3059\u308b\u304b\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u5b89\u5b9a\u3057\u305f\u5c06\u6765\u306b\u5099\u3048\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u3059\u307e\u3059\u63a5\u7d9a\u3055\u308c\u305f\u4e16\u754c\u306b\u304a\u3044\u3066\u3001\u6709\u7dda\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8LAN\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u306f\u4fe1\u983c\u3067\u304d\u308b\u30c7\u30b8\u30bf\u30eb\u901a\u4fe1\u306e\u57fa\u76e4\u3068\u3057\u3066\u6b8b\u308a\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>LAN\u30b1\u30fc\u30d6\u30eb\u306f\u3001\u30ed\u30fc\u30ab\u30eb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u306e\u30c7\u30d0\u30a4\u30b9\u3092\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u6709\u7dda\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30b1\u30fc\u30d6\u30eb\u3067\u3042\u308a\u3001RJ45\u30b3\u30cd\u30af\u30bf\u3092\u901a\u3058\u3066\u5b89\u5b9a\u3057\u305f\u9ad8\u901f\u30c7\u30fc\u30bf\u4f1d\u9001\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002LAN\u30b1\u30fc\u30d6\u30eb\u306e\u4ed5\u7d44\u307f\u3001\u30ab\u30c6\u30b4\u30ea\u30fc\u3001\u901f\u5ea6\u6027\u80fd\u3001\u8a2d\u7f6e\u57fa\u6e96\u3001\u305d\u3057\u3066\u306a\u305c\u7121\u7dda\u63a5\u7d9a\u3088\u308a\u3082\u4fe1\u983c\u6027\u304c\u9ad8\u3044\u306e\u304b\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002.<\/p>","protected":false},"author":3,"featured_media":5535,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[],"class_list":["post-5534","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-networks","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Is a LAN Cable? Definition, Types, Uses, and How It Works | Security Briefing<\/title>\n<meta name=\"description\" content=\"What is a LAN cable? Learn how Ethernet LAN cables work, RJ45 connectors, speed categories, installation standards, and why wired network connections outperform WiFi.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/securitybriefing.net\/ja\/\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\/lan\u30b1\u30fc\u30d6\u30eb\u3068\u306f-\u5b9a\u7fa9-\u7a2e\u985e-\u4f7f\u7528\u6cd5-\u4ed5\u7d44\u307f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is a LAN Cable? Definition, Types, Uses, and How It Works | Security Briefing\" \/>\n<meta property=\"og:description\" content=\"What is a LAN cable? Learn how Ethernet LAN cables work, RJ45 connectors, speed categories, installation standards, and why wired network connections outperform WiFi.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/securitybriefing.net\/ja\/\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\/lan\u30b1\u30fc\u30d6\u30eb\u3068\u306f-\u5b9a\u7fa9-\u7a2e\u985e-\u4f7f\u7528\u6cd5-\u4ed5\u7d44\u307f\/\" \/>\n<meta property=\"og:site_name\" content=\"Security Briefing\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-24T21:10:34+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-27T21:17:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/securitybriefing.net\/wp-content\/uploads\/2026\/02\/What-Is-a-LAN-Cable.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"C\u00e9sar Daniel Barreto\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"C\u00e9sar Daniel Barreto\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"5\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/securitybriefing.net\/networks\/what-is-a-lan-cable-definition-types-uses-and-how-it-works\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/securitybriefing.net\/networks\/what-is-a-lan-cable-definition-types-uses-and-how-it-works\/\"},\"author\":{\"name\":\"C\u00e9sar Daniel Barreto\",\"@id\":\"https:\/\/securitybriefing.net\/#\/schema\/person\/164e5a0bfff5012ebfb8eb4d03c2c24c\"},\"headline\":\"What Is a LAN Cable? 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