{"id":258,"date":"2026-02-02T16:31:21","date_gmt":"2026-02-02T07:31:21","guid":{"rendered":"https:\/\/venu-sys.co.jp\/knowledge\/?post_type=glossary&#038;p=258"},"modified":"2026-02-05T20:27:08","modified_gmt":"2026-02-05T11:27:08","slug":"l3-switch","status":"publish","type":"glossary","link":"https:\/\/venu-sys.co.jp\/knowledge\/glossary\/l3-switch\/","title":{"rendered":"L3\u30b9\u30a4\u30c3\u30c1"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u3010\u56f3\u89e3\u3011L3\u30b9\u30a4\u30c3\u30c1\u3068\u306f\uff1fL2\u30b9\u30a4\u30c3\u30c1\u30fb\u30eb\u30fc\u30bf\u30fc\u3068\u306e\u9055\u3044\u3084\u4f7f\u3044\u5206\u3051\u3092\u89e3\u8aac<\/h1>\n\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"blue\"><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p>L3\u30b9\u30a4\u30c3\u30c1\u306f\u3069\u306e\u3088\u3046\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\uff1f<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"blue\"><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p>L2\u30b9\u30a4\u30c3\u30c1\u3084\u30eb\u30fc\u30bf\u30fc\u3068\u306f\u4f55\u304c\u9055\u3046\u306e\uff1f<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n<div class=\"swell-block-balloon\"><div class=\"c-balloon -bln-left\" data-col=\"blue\"><div class=\"c-balloon__body -speaking -border-none\"><div class=\"c-balloon__text\">\n<p>L3\u30b9\u30a4\u30c3\u30c1\u306f\u3069\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u4f7f\u7528\u3055\u308c\u308b\u306e\uff1f<\/p>\n<span class=\"c-balloon__shapes\"><span class=\"c-balloon__before\"><\/span><span class=\"c-balloon__after\"><\/span><\/span><\/div><\/div><\/div><\/div>\n\n\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u7bc9\u306e\u73fe\u5834\u3067\u306f\u3001\u6a5f\u5668\u9078\u5b9a\u306e\u30df\u30b9\u304c\u901a\u4fe1\u901f\u5ea6\u306e\u4f4e\u4e0b\u3084\u4e88\u7b97\u30aa\u30fc\u30d0\u30fc\u3092\u62db\u304f\u539f\u56e0\u306b\u306a\u308a\u307e\u3059\u3002L3\u30b9\u30a4\u30c3\u30c1\u306e\u5f79\u5272\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u52b9\u7387\u7684\u306a\u30a4\u30f3\u30d5\u30e9\u8a2d\u8a08\u306e\u305f\u3081\u306b\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong><span class=\"swl-marker mark_yellow\"><span class=\"swl-inline-color has-swl-deep-01-color\">L3\u30b9\u30a4\u30c3\u30c1\u3068\u306f\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u6a5f\u80fd\u3092\u5099\u3048\u305f\u9ad8\u901f\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u30a4\u30c3\u30c1<\/span><\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001L3\u30b9\u30a4\u30c3\u30c1\u306e\u57fa\u790e\u5b9a\u7fa9\u304b\u3089L2\u30b9\u30a4\u30c3\u30c1\u30fb\u30eb\u30fc\u30bf\u30fc\u3068\u306e\u660e\u78ba\u306a\u9055\u3044\u3001\u5177\u4f53\u7684\u306a\u6d3b\u7528\u30b7\u30fc\u30f3\u307e\u3067\u3092\u56f3\u89e3\u3092\u4ea4\u3048\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_announce\">\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306e\u9069\u5207\u306a\u4f7f\u3044\u5206\u3051\u304c\u5224\u65ad\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L3\u30b9\u30a4\u30c3\u30c1\u3068\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u6a5f\u80fd\u3092\u5099\u3048\u305f\u9ad8\u901f\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u30a4\u30c3\u30c1<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"572\" src=\"https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162608.822-1024x572.jpg\" alt=\"L3\u30b9\u30a4\u30c3\u30c1\u3068\u306f\u306e\u753b\u50cf\" class=\"wp-image-368\" style=\"width:640px\" srcset=\"https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162608.822-1024x572.jpg 1024w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162608.822-300x167.jpg 300w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162608.822-768x429.jpg 768w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162608.822-1536x857.jpg 1536w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162608.822-2048x1143.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>L3\u30b9\u30a4\u30c3\u30c1\u306f\u3001OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306e\u7b2c3\u5c64\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\uff09\u3067\u52d5\u4f5c\u3059\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6\u304c\u6301\u3064<strong><span class=\"swl-marker mark_yellow\"><span class=\"swl-inline-color has-swl-deep-01-color\">\u300c\u30c7\u30fc\u30bf\u306e\u6a4b\u6e21\u3057\u6a5f\u80fd\u300d\u306b\u3001\u30eb\u30fc\u30bf\u30fc\u304c\u6301\u3064\u300c\u7d4c\u8def\u5236\u5fa1\uff08\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\uff09\u6a5f\u80fd\u300d\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u7279\u5fb4<\/span><\/span><\/strong>\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<p>L3\u30b9\u30a4\u30c3\u30c1\u306e\u6700\u5927\u306e\u7279\u5fb4\u306f\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u5185\u90e8\u306b\u642d\u8f09\u3055\u308c\u305f\u5c02\u7528\u30c1\u30c3\u30d7\uff08ASIC\uff09\u3067\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u51e6\u7406\u3092\u884c\u3046\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u51e6\u7406\u3092\u884c\u3046\u4e00\u822c\u7684\u306a\u30eb\u30fc\u30bf\u30fc\u3068\u6bd4\u8f03\u3057\u3066\u3001\u9ad8\u901f\u306a\u30c7\u30fc\u30bf\u8ee2\u9001\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6458210138304151\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- \u6a2a\u9577 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:728px;height:150px\"\r\n     data-ad-client=\"ca-pub-6458210138304151\"\r\n     data-ad-slot=\"3619347934\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">L3\u30b9\u30a4\u30c3\u30c1\u3068L2\u30b9\u30a4\u30c3\u30c1\u306e\u9055\u3044<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"572\" src=\"https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162653.354-1024x572.jpg\" alt=\"L3\u30b9\u30a4\u30c3\u30c1\u3068L2\u30b9\u30a4\u30c3\u30c1\u306e\u9055\u3044\u306e\u753b\u50cf\" class=\"wp-image-369\" style=\"width:640px\" srcset=\"https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162653.354-1024x572.jpg 1024w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162653.354-300x167.jpg 300w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162653.354-768x429.jpg 768w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162653.354-1536x857.jpg 1536w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162653.354-2048x1143.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>L3\u30b9\u30a4\u30c3\u30c1\u3068L2\u30b9\u30a4\u30c3\u30c1\u306e\u9055\u3044\u306f\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08VLAN\uff09\u9593\u3067\u901a\u4fe1\u3092\u884c\u3048\u308b\u304b\u3069\u3046\u304b\u306b\u3042\u308a\u307e\u3059\u3002<strong><span class=\"swl-marker mark_yellow\"><span class=\"swl-inline-color has-swl-deep-01-color\">L2\u30b9\u30a4\u30c3\u30c1\u306f\u540c\u4e00\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5185\u3067\u306e\u307f\u30c7\u30fc\u30bf\u3092\u8ee2\u9001\u3057\u307e\u3059\u304c\u3001L3\u30b9\u30a4\u30c3\u30c1\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u58c1\u3092\u8d8a\u3048\u305f\u901a\u4fe1\u304c\u53ef\u80fd<\/span><\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table style=\"font-size:12px;\" class=\"has-fixed-layout\"><thead><tr><td><strong>\u6bd4\u8f03\u9805\u76ee<\/strong><\/td><td><strong>L2\u30b9\u30a4\u30c3\u30c1<\/strong><\/td><td><strong>L3\u30b9\u30a4\u30c3\u30c1<\/strong><\/td><\/tr><\/thead><tbody><tr><td>\u52d5\u4f5c\u30ec\u30a4\u30e4\u30fc<\/td><td>\u7b2c2\u5c64\uff08\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\uff09<\/td><td>\u7b2c3\u5c64\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\uff09<\/td><\/tr><tr><td>\u8b58\u5225\u60c5\u5831<\/td><td>MAC\u30a2\u30c9\u30ec\u30b9<\/td><td>IP\u30a2\u30c9\u30ec\u30b9\u30fbMAC\u30a2\u30c9\u30ec\u30b9<\/td><\/tr><tr><td>\u4e3b\u306a\u5f79\u5272<\/td><td>\u540c\u4e00\u30bb\u30b0\u30e1\u30f3\u30c8\u5185\u306e\u901a\u4fe1<\/td><td>\u7570\u306a\u308b\u30bb\u30b0\u30e1\u30f3\u30c8\u9593\u306e\u901a\u4fe1<\/td><\/tr><tr><td>VLAN\u9593\u901a\u4fe1<\/td><td>\u4e0d\u53ef<\/td><td>\u53ef\u80fd<\/td><\/tr><tr><td>\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0<\/td><td>\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044<\/td><td>\u5bfe\u5fdc\u3057\u3066\u3044\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>L2\u30b9\u30a4\u30c3\u30c1\u306f\u300cMAC\u30a2\u30c9\u30ec\u30b9\u300d\u3092\u5b66\u7fd2\u3057\u3001\u3069\u306e\u30dd\u30fc\u30c8\u306b\u3069\u306e\u30d1\u30bd\u30b3\u30f3\u304c\u7e4b\u304c\u3063\u3066\u3044\u308b\u304b\u3092\u8a18\u61b6\u3057\u3066\u30c7\u30fc\u30bf\u3092\u5c4a\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u65b9\u3067L3\u30b9\u30a4\u30c3\u30c1\u306f\u300cIP\u30a2\u30c9\u30ec\u30b9\u300d\u3092\u57fa\u306b\u7d4c\u8def\u3092\u5224\u65ad\u3059\u308b\u305f\u3081\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9593\u306e\u4e2d\u7d99\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_announce\">\u5927\u898f\u6a21\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u69cb\u7bc9\u3059\u308b\u969b\u3001\u901a\u4fe1\u3092\u6574\u7406\u3057\u3066\u8ca0\u8377\u3092\u5206\u6563\u3055\u305b\u308b\u305f\u3081\u306bL3\u30b9\u30a4\u30c3\u30c1\u304c\u63a1\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6458210138304151\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- \u6a2a\u9577 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:728px;height:150px\"\r\n     data-ad-client=\"ca-pub-6458210138304151\"\r\n     data-ad-slot=\"3619347934\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">L3\u30b9\u30a4\u30c3\u30c1\u3068\u30eb\u30fc\u30bf\u30fc\u306e\u9055\u3044<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"572\" src=\"https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162826.568-1024x572.jpg\" alt=\"L3\u30b9\u30a4\u30c3\u30c1\u3068\u30eb\u30fc\u30bf\u30fc\u306e\u9055\u3044\u306e\u753b\u50cf\" class=\"wp-image-370\" style=\"width:640px\" srcset=\"https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162826.568-1024x572.jpg 1024w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162826.568-300x167.jpg 300w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162826.568-768x429.jpg 768w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162826.568-1536x857.jpg 1536w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162826.568-2048x1143.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" 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class=\"has-fixed-layout\"><thead><tr><td><strong>\u6bd4\u8f03\u9805\u76ee<\/strong><\/td><td><strong>L3\u30b9\u30a4\u30c3\u30c1<\/strong><\/td><td><strong>\u30eb\u30fc\u30bf\u30fc<\/strong><\/td><\/tr><\/thead><tbody><tr><td>\u51e6\u7406\u65b9\u5f0f<\/td><td>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\uff08\u5c02\u7528\u30c1\u30c3\u30d7\uff09<\/td><td>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\uff08CPU\uff09<\/td><\/tr><tr><td>\u8ee2\u9001\u30b9\u30d4\u30fc\u30c9<\/td><td>\u975e\u5e38\u306b\u9ad8\u901f<\/td><td>L3\u30b9\u30a4\u30c3\u30c1\u306b\u52a3\u308b<\/td><\/tr><tr><td>\u30dd\u30fc\u30c8\u6570<\/td><td>\u591a\u3044\uff0824\u301c48\u30dd\u30fc\u30c8\u7b49\uff09<\/td><td>\u5c11\u306a\u3044\uff08\u6570\u30dd\u30fc\u30c8\u7a0b\u5ea6\uff09<\/td><\/tr><tr><td>WAN\u63a5\u7d9a<\/td><td>\u57fa\u672c\u7684\u306b\u975e\u5bfe\u5fdc<\/td><td>\u5bfe\u5fdc\uff08\u5149\u56de\u7dda\u3084\u5c02\u7528\u7dda\uff09<\/td><\/tr><tr><td>\u4e3b\u306a\u7528\u9014<\/td><td>LAN\u5185\u306e\u9ad8\u901f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0<\/td><td>\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3068\u306e\u5883\u754c\u63a5\u7d9a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong><span class=\"swl-marker mark_yellow\"><span class=\"swl-inline-color has-swl-deep-01-color\">L3\u30b9\u30a4\u30c3\u30c1\u306f\u3001\u5185\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08LAN\uff09\u306e\u9ad8\u901f\u5316\u306b\u7279\u5316\u3057\u305f\u6a5f\u5668<\/span><\/span><\/strong>\u3067\u3059\u3002\u30dd\u30fc\u30c8\u6570\u304c\u591a\u304f\u3001\u591a\u6570\u306e\u30d1\u30bd\u30b3\u30f3\u3084\u30b5\u30fc\u30d0\u30fc\u3092\u76f4\u63a5\u53ce\u5bb9\u3057\u306a\u304c\u3089\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9593\u306e\u901a\u4fe1\u3092\u77ac\u6642\u306b\u51e6\u7406\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30eb\u30fc\u30bf\u30fc\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\uff08WAN\uff09\u3068\u793e\u5185\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u7d50\u3076\u5883\u754c\u7dda\u306b\u8a2d\u7f6e\u3059\u308b\u6a5f\u5668\u3067\u3059\u3002\u901a\u4fe1\u901f\u5ea6\u3088\u308a\u3082\u3001\u8907\u96d1\u306a\u63a5\u7d9a\u65b9\u5f0f\u3078\u306e\u5bfe\u5fdc\u3084\u5f37\u56fa\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u3001VPN\u63a5\u7d9a\u3068\u3044\u3063\u305f\u591a\u6a5f\u80fd\u6027\u3092\u91cd\u8996\u3057\u3066\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<script 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alt=\"L3\u30b9\u30a4\u30c3\u30c1\u304c\u4f7f\u7528\u3055\u308c\u308b\u5834\u9762\u306e\u753b\u50cf\" class=\"wp-image-371\" style=\"width:640px\" srcset=\"https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162908.704-1024x572.jpg 1024w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162908.704-300x167.jpg 300w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162908.704-768x429.jpg 768w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162908.704-1536x857.jpg 1536w, https:\/\/venu-sys.co.jp\/knowledge\/wp-content\/uploads\/sites\/6\/2026\/02\/unnamed-2026-02-02T162908.704-2048x1143.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" 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2.4 2.9 2.4 4.7v.6c0 .6.4 1 1 1h10c.6 0 1-.4 1-1V35c0-1.9.9-3.7 2.5-4.8 4.3-3.2 6.3-8.5 5.3-13.9-.4-2-1.2-3.8-2.4-5.4-3-4-7.4-6.1-12.1-5.9z\"><\/path><\/svg><span>L3\u30b9\u30a4\u30c3\u30c1\u304c\u4f7f\u7528\u3055\u308c\u308b\u5834\u9762<\/span><\/div><div class=\"cap_box_content\">\n<ul class=\"wp-block-list is-style-check_list\">\n<li><strong>VLAN\u9593\u306e\u9ad8\u901f\u901a\u4fe1<\/strong>\uff1a<br>\u90e8\u7f72\u3054\u3068\u306b\u5206\u5272\u3055\u308c\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u540c\u58eb\u3092\u63a5\u7d9a\u3057\u3001\u7570\u306a\u308b\u30b0\u30eb\u30fc\u30d7\u9593\u3067\u306e\u30c7\u30fc\u30bf\u5171\u6709\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30b3\u30a2\u30b9\u30a4\u30c3\u30c1\u3068\u3057\u3066\u306e\u96c6\u7d04<\/strong>\uff1a<br>\u5404\u30d5\u30ed\u30a2\u306eL2\u30b9\u30a4\u30c3\u30c1\u304b\u3089\u96c6\u307e\u308b\u81a8\u5927\u306a\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u6838\u3068\u3057\u3066\u4e00\u62ec\u3067\u9ad8\u901f\u51e6\u7406\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u5197\u9577\u69cb\u6210\u306b\u3088\u308b\u969c\u5bb3\u5bfe\u7b56<\/strong>\uff1a<br>2\u53f0\u306eL3\u30b9\u30a4\u30c3\u30c1\u3092\u9023\u643a\u3055\u305b\u3001\u7247\u65b9\u304c\u6545\u969c\u3057\u3066\u3082\u901a\u4fe1\u3092\u7d99\u7d9a\u3067\u304d\u308b\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u30a4\u30f3\u30d5\u30e9\u3092\u69cb\u7bc9\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<strong><span class=\"swl-marker mark_yellow\"><span class=\"swl-inline-color has-swl-deep-01-color\">\u901a\u4fe1\u91cf\u304c\u591a\u304f\u505c\u6b62\u304c\u8a31\u3055\u308c\u306a\u3044\u4e2d\u5927\u898f\u6a21\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u53f8\u4ee4\u5854\u3068\u3057\u3066\u3001L3\u30b9\u30a4\u30c3\u30c1\u306f\u4e0d\u53ef\u6b20\u306a\u5b58\u5728<\/span><\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6458210138304151\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- \u6a2a\u9577 -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:728px;height:150px\"\r\n     data-ad-client=\"ca-pub-6458210138304151\"\r\n     data-ad-slot=\"3619347934\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">L3\u30b9\u30a4\u30c3\u30c1\u306b\u95a2\u3059\u308b\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n\n\n<div class=\"swell-block-faq\" data-q=\"fill-main\" data-a=\"col-text\">\n<div class=\"swell-block-faq__item\"><h3 class=\"faq_q\">OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3068\u306f\uff1f<\/h3><div class=\"faq_a\">\n<p><a href=\"https:\/\/venu-sys.co.jp\/knowledge\/glossary\/osi\/\" target=\"_blank\" rel=\"noreferrer noopener\">OSI\u53c2\u7167\u30e2\u30c7\u30eb<\/a>\u306f\u3001<strong><span class=\"swl-marker mark_yellow\"><span class=\"swl-inline-color has-swl-deep-01-color\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3057\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306b\u3001\u6a5f\u80fd\u30927\u3064\u306e\u968e\u5c64\u306b\u5206\u5272\u3057\u305f\u30e2\u30c7\u30eb<\/span><\/span><\/strong>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u30e1\u30fc\u30ab\u30fc\u304c\u7570\u306a\u308b\u6a5f\u5668\u540c\u58eb\u3067\u3082\u901a\u4fe1\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u3001\u56fd\u969b\u6a19\u6e96\u5316\u6a5f\u69cb\uff08ISO\uff09\u304c\u7b56\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>L3\u30b9\u30a4\u30c3\u30c1\u306e\u300cL3\u300d\u306f\u3001\u3053\u306e\u30e2\u30c7\u30eb\u306e\u7b2c3\u5c64\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\uff09\u3092\u6307\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7b2c1\u5c64\u304c\u7269\u7406\u7684\u306a\u30b1\u30fc\u30d6\u30eb\u3001\u7b2c2\u5c64\u304cMAC\u30a2\u30c9\u30ec\u30b9\u306b\u3088\u308b\u8fd1\u96a3\u901a\u4fe1\u3001\u7b2c3\u5c64\u304cIP\u30a2\u30c9\u30ec\u30b9\u306b\u3088\u308b\u5e83\u57df\u901a\u4fe1\u3092\u62c5\u3046\u3068\u3044\u3063\u305f\u5177\u5408\u306b\u5f79\u5272\u304c\u6c7a\u307e\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"swell-block-faq__item\"><h3 class=\"faq_q\">L3\u30b9\u30a4\u30c3\u30c1\u3068\u30cf\u30d6\u3068\u306e\u9055\u3044\u306f\uff1f<\/h3><div class=\"faq_a\">\n<p>L3\u30b9\u30a4\u30c3\u30c1\u3068\u30cf\u30d6\u306e\u9055\u3044\u306f\u3001<strong><span class=\"swl-marker mark_yellow\"><span class=\"swl-inline-color 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