{"id":186,"date":"2025-02-11T10:59:00","date_gmt":"2025-02-11T01:59:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=186"},"modified":"2025-10-09T10:59:08","modified_gmt":"2025-10-09T01:59:08","slug":"ethernet-lan%ef%bc%88%e9%80%9a%e4%bf%a1%e6%96%b9%e5%bc%8f%e3%83%bb%e5%88%b6%e5%be%a1%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=186","title":{"rendered":"Ethernet LAN\uff08\u901a\u4fe1\u65b9\u5f0f\u30fb\u5236\u5fa1\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">CSMA\/CD\u3068\u306f\u4f55\u304b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">CSMA\/CD<\/span><\/strong>\u306f\u300cCarrier Sense Multiple Access with Collision Detection\u300d\u306e\u7565\u3067\u3001\u65e5\u672c\u8a9e\u306b\u3059\u308b\u3068\u300c\u642c\u9001\u6ce2\u611f\u77e5\u591a\u91cd\u30a2\u30af\u30bb\u30b9\u30fb\u885d\u7a81\u691c\u51fa\u65b9\u5f0f\u300d\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u521d\u671f\u306e\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u3067\u63a1\u7528\u3055\u308c\u3066\u3044\u305f\u901a\u4fe1\u5236\u5fa1\u306e\u4ed5\u7d44\u307f\u3067\u300110Base5\u308410Base2\u3068\u3044\u3063\u305f\u540c\u8ef8\u30b1\u30fc\u30d6\u30eb\u3092\u4f7f\u3046\u30d0\u30b9\u578bLAN\u3001\u307e\u305f\u306f\u30cf\u30d6\u3092\u5229\u7528\u3057\u305f\u30b9\u30bf\u30fc\u578bLAN\u3067\u5e83\u304f\u7528\u3044\u3089\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3057\u304b\u3057\u73fe\u5728\u306f\u3001\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6\u3068\u5168\u4e8c\u91cd\u901a\u4fe1\u304c\u666e\u53ca\u3057\u305f\u305f\u3081\u3001CSMA\/CD\u304c\u4f7f\u308f\u308c\u308b\u5834\u9762\u306f\u307b\u3068\u3093\u3069\u306a\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u8a66\u9a13\u3067\u306f\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u76ee\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CSMA\/CD\u306e\u57fa\u672c\u52d5\u4f5c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">CSMA\/CD\u306e\u8003\u3048\u65b9\u306f\u3068\u3066\u3082\u30b7\u30f3\u30d7\u30eb\u3067\u3001<strong><span class=\"swl-marker mark_yellow\">\u300c\u7a7a\u3044\u3066\u3044\u308b\u3068\u304d\u306b\u9001\u308b\u3001\u3076\u3064\u304b\u3063\u305f\u3089\u3084\u308a\u76f4\u3059\u300d<\/span><\/strong>\u3068\u3044\u3046\u30eb\u30fc\u30eb\u306b\u5f93\u3044\u307e\u3059\u3002\u30a4\u30e1\u30fc\u30b8\u3057\u3084\u3059\u3044\u3088\u3046\u306b\u3001\u8907\u6570\u4eba\u304c\u540c\u6642\u306b\u8a71\u305d\u3046\u3068\u3059\u308b\u4f1a\u8b70\u3092\u4f8b\u306b\u3059\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u4eba\u304c\u8a71\u3057\u3066\u3044\u308b\u3068\u304d\u306b\u3001\u4ed6\u306e\u4eba\u306f\u305d\u308c\u3092\u805e\u3044\u3066\u3044\u3066\u767a\u8a00\u3092\u63a7\u3048\u307e\u3059\u3002\u8ab0\u3082\u8a71\u3057\u3066\u3044\u306a\u3044\u30bf\u30a4\u30df\u30f3\u30b0\uff08\u56de\u7dda\u304c\u7a7a\u3044\u3066\u3044\u308b\u72b6\u614b\uff09\u306b\u306a\u308c\u3070\u3001\u81ea\u5206\u304c\u767a\u8a00\u3092\u59cb\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3068\u3053\u308d\u304c\u3001\u3082\u3057\u8907\u6570\u4eba\u304c\u540c\u6642\u306b\u8a71\u3057\u59cb\u3081\u305f\u3089\u58f0\u304c\u304b\u3076\u3063\u3066\u805e\u304d\u53d6\u308c\u306a\u304f\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u304c<strong><span class=\"swl-marker mark_yellow\">\u300c\u30b3\u30ea\u30b8\u30e7\u30f3\uff08\u885d\u7a81\uff09\u300d<\/span><\/strong>\u3067\u3059\u3002\u885d\u7a81\u304c\u8d77\u304d\u305f\u3068\u304d\u306f\u5168\u54e1\u304c\u4e00\u65e6\u9ed9\u308a\u3001\u30e9\u30f3\u30c0\u30e0\u306b\u6642\u9593\u3092\u304a\u3044\u3066\u304b\u3089\u518d\u3073\u767a\u8a00\u3092\u8a66\u307f\u307e\u3059\u3002\u3053\u306e\u300c\u5f85\u3061\u6642\u9593\u300d\u3092\u8a2d\u3051\u308b\u3053\u3068\u3067\u3001\u518d\u5ea6\u540c\u3058\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u885d\u7a81\u3059\u308b\u78ba\u7387\u3092\u4e0b\u3052\u3066\u3044\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3092\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u7f6e\u304d\u63db\u3048\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><span class=\"swl-marker mark_yellow\">Carrier Sense\uff08\u642c\u9001\u6ce2\u611f\u77e5\uff09<\/span><\/strong>\uff1a\u30b1\u30fc\u30d6\u30eb\u306b\u4fe1\u53f7\u304c\u6d41\u308c\u3066\u3044\u306a\u3044\u304b\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n\n\n\n<li><strong><span class=\"swl-marker mark_yellow\">Multiple Access\uff08\u591a\u91cd\u30a2\u30af\u30bb\u30b9\uff09<\/span><\/strong>\uff1a\u8907\u6570\u306e\u7aef\u672b\u304c\u540c\u3058\u30b1\u30fc\u30d6\u30eb\u3092\u5171\u6709\u3057\u3066\u5229\u7528\u3059\u308b\u3002<\/li>\n\n\n\n<li><strong><span class=\"swl-marker mark_yellow\">Collision Detection\uff08\u885d\u7a81\u691c\u51fa\uff09<\/span><\/strong>\uff1a\u3082\u3057\u540c\u6642\u9001\u4fe1\u3067\u885d\u7a81\u3057\u305f\u3089\u691c\u51fa\u3057\u3001\u518d\u9001\u3092\u884c\u3046\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u30d0\u30c3\u30af\u30aa\u30d5\u3068\u518d\u9001<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u885d\u7a81\u304c\u691c\u51fa\u3055\u308c\u305f\u3068\u304d\u3001\u7aef\u672b\u306f<strong><span class=\"swl-marker mark_yellow\">\u300c\u30b8\u30e3\u30e0\u4fe1\u53f7\u300d<\/span><\/strong>\u3068\u547c\u3070\u308c\u308b\u901a\u77e5\u3092\u6d41\u3057\u3066\u5168\u54e1\u306b\u300c\u885d\u7a81\u304c\u8d77\u304d\u305f\u300d\u3068\u77e5\u3089\u305b\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u5404\u7aef\u672b\u306f\u30e9\u30f3\u30c0\u30e0\u306a\u6642\u9593\u3060\u3051\u5f85\u3063\u3066\u304b\u3089\u518d\u9001\u3092\u8a66\u307f\u307e\u3059\u3002\u3053\u308c\u3092<strong><span class=\"swl-marker mark_yellow\">\u300c\u30d0\u30c3\u30af\u30aa\u30d5\u300d<\/span><\/strong>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d0\u30c3\u30af\u30aa\u30d5\u306f<strong><span class=\"swl-marker mark_yellow\">\u6700\u592715\u56de<\/span><\/strong>\u7e70\u308a\u8fd4\u3055\u308c\u3001\u305d\u308c\u3067\u3082\u6210\u529f\u3057\u306a\u3044\u5834\u5408\u306f16\u56de\u76ee\u3067\u30d5\u30ec\u30fc\u30e0\u3092\u7834\u68c4\u3057\u307e\u3059\u3002\u3053\u306e\u6319\u52d5\u306f\u8a66\u9a13\u3067\u554f\u308f\u308c\u308b\u3053\u3068\u304c\u3042\u308b\u305f\u3081\u3001\u899a\u3048\u3066\u304a\u304f\u3068\u5b89\u5fc3\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5168\u4e8c\u91cd\u901a\u4fe1\u3068\u534a\u4e8c\u91cd\u901a\u4fe1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u901a\u4fe1\u65b9\u5f0f\u306b\u306f\u300c\u5168\u4e8c\u91cd\u901a\u4fe1\u300d\u3068\u300c\u534a\u4e8c\u91cd\u901a\u4fe1\u300d\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">\u5168\u4e8c\u91cd\u901a\u4fe1\uff08full duplex\uff09<\/span><\/strong> \u306f\u3001\u9001\u4fe1\u3068\u53d7\u4fe1\u3092\u540c\u6642\u306b\u884c\u3048\u308b\u65b9\u5f0f\u3067\u3059\u3002\u307e\u308b\u3067\u96fb\u8a71\u306e\u3088\u3046\u306b\u3001\u304a\u4e92\u3044\u304c\u540c\u6642\u306b\u4f1a\u8a71\u3067\u304d\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002\u3053\u306e\u4ed5\u7d44\u307f\u3092\u4f7f\u3046\u3068\u3001\u540c\u3058\u5e2f\u57df\u5e45\u3067\u30822\u500d\u306e\u52b9\u7387\u3067\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"swl-marker mark_yellow\"><strong>\u534a\u4e8c\u91cd\u901a\u4fe1\uff08half duplex\uff09<\/strong> <\/span>\u306f\u3001\u9001\u4fe1\u3068\u53d7\u4fe1\u3092\u540c\u6642\u306b\u884c\u3048\u305a\u3001\u4ea4\u4e92\u306b\u3057\u304b\u901a\u4fe1\u3067\u304d\u307e\u305b\u3093\u3002\u30c8\u30e9\u30f3\u30b7\u30fc\u30d0\u30fc\u306e\u3088\u3046\u306b\u300c\u3069\u3046\u305e\u300d\u3068\u8a00\u3063\u3066\u76f8\u624b\u306b\u8b72\u3089\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u5168\u4e8c\u91cd\u306b\u6bd4\u3079\u308b\u3068\u52b9\u7387\u306f\u534a\u5206\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5168\u4e8c\u91cd\u3068\u534a\u4e8c\u91cd\u306e\u9055\u3044<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">CSMA\/CD\u306f<strong><span class=\"swl-marker mark_yellow\">\u534a\u4e8c\u91cd\u901a\u4fe1<\/span><\/strong>\u306e\u3068\u304d\u306b\u3057\u304b\u4f7f\u308f\u308c\u307e\u305b\u3093\u3002\u534a\u4e8c\u91cd\u901a\u4fe1\u3067\u306f\u300c\u540c\u6642\u306b\u9001\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u304c\u3001\u4ea4\u4e92\u306b\u9001\u53d7\u4fe1\u3059\u308b\u300d\u5f62\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u885d\u7a81\u304c\u8d77\u3053\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65b9\u3067\u73fe\u5728\u4e3b\u6d41\u306e<strong><span class=\"swl-marker mark_yellow\">\u5168\u4e8c\u91cd\u901a\u4fe1<\/span><\/strong>\u3067\u306f\u3001\u9001\u4fe1\u3068\u53d7\u4fe1\u3092\u540c\u6642\u306b\u884c\u3048\u308b\u305f\u3081\u885d\u7a81\u306f\u767a\u751f\u3057\u307e\u305b\u3093\u3002\u30b9\u30a4\u30c3\u30c1\u3092\u4f7f\u3063\u305fLAN\u74b0\u5883\u3067\u306f\u57fa\u672c\u7684\u306b\u5168\u4e8c\u91cd\u901a\u4fe1\u304c\u4f7f\u308f\u308c\u308b\u305f\u3081\u3001CSMA\/CD\u306f\u904e\u53bb\u306e\u6280\u8853\u3068\u3057\u3066\u7406\u89e3\u3057\u3066\u304a\u3051\u3070\u5341\u5206\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u306f\u8a66\u9a13\u3067\u3082<strong><span class=\"swl-marker mark_yellow\">\u300cCSMA\/CD\u306f\u534a\u4e8c\u91cd\u3067\u306e\u307f\u5229\u7528\u3055\u308c\u308b\u300d<\/span><\/strong>\u3068\u3044\u3046\u70b9\u304c\u3088\u304f\u554f\u308f\u308c\u307e\u3059\u3002\u5168\u4e8c\u91cd\u306e\u74b0\u5883\u3067\u306f\u4e0d\u8981\u3067\u3042\u308b\u3053\u3068\u3092\u5fc5\u305a\u62bc\u3055\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30a4\u30c3\u30c1\u3067\u306e\u8a2d\u5b9a\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cisco Catalyst \u30b9\u30a4\u30c3\u30c1\u3067\u306f\u3001\u901a\u4fe1\u901f\u5ea6\u3084\u901a\u4fe1\u30e2\u30fc\u30c9\u3092\u624b\u52d5\u3067\u56fa\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u300cFastEthernet0\/1\u300d\u3092100Mbps\u30fb\u5168\u4e8c\u91cd\u3067\u52d5\u4f5c\u3055\u305b\u308b\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Catalyst(config)# interface FastEthernet 0\/1\nCatalyst(config-if)# speed 100\nCatalyst(config-if)# duplex full<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u56fa\u5b9a\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u8aa4\u3063\u305f\u901a\u4fe1\u30e2\u30fc\u30c9\u304c\u9078\u3070\u308c\u308b\u306e\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8LAN\u3067\u306f\u3001\u6a5f\u5668\u540c\u58eb\u304c\u540c\u3058\u901f\u5ea6\u30fb\u540c\u3058\u901a\u4fe1\u30e2\u30fc\u30c9\u3067\u52d5\u4f5c\u3057\u306a\u3051\u308c\u3070\u901a\u4fe1\u304c\u5b89\u5b9a\u3057\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001IEEE802.3u\u3067\u6a19\u6e96\u5316\u3055\u308c\u305f <strong><span class=\"swl-marker mark_yellow\">\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3<\/span><\/strong> \u6a5f\u80fd\u304c\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f\u63a5\u7d9a\u3055\u308c\u305f\u6a5f\u5668\u540c\u58eb\u304c\u300cFLP\u30d0\u30fc\u30b9\u30c8\u300d\u3068\u547c\u3070\u308c\u308b\u4fe1\u53f7\u3092\u3084\u308a\u53d6\u308a\u3057\u306a\u304c\u3089\u3001\u3069\u306e\u901f\u5ea6\u30fb\u30e2\u30fc\u30c9\u3067\u901a\u4fe1\u3067\u304d\u308b\u304b\u3092\u81ea\u52d5\u3067\u8abf\u6574\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u6c7a\u5b9a\u3059\u308b\u3068\u304d\u306f\u512a\u5148\u9806\u4f4d\u306b\u5f93\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee3\u8868\u7684\u306a\u512a\u5148\u9806\u4f4d\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>1000BaseT \/ \u5168\u4e8c\u91cd<\/li>\n\n\n\n<li>1000BaseT \/ \u534a\u4e8c\u91cd<\/li>\n\n\n\n<li>100BaseTX \/ \u5168\u4e8c\u91cd<\/li>\n\n\n\n<li>100BaseTX \/ \u534a\u4e8c\u91cd<\/li>\n\n\n\n<li>10BaseT \/ \u5168\u4e8c\u91cd<\/li>\n\n\n\n<li>10BaseT \/ \u534a\u4e8c\u91cd<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306b\u306f\u3055\u3089\u306b\u7d30\u304b\u3044\u5b9a\u7fa9\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u8a66\u9a13\u5bfe\u7b56\u3068\u3057\u3066\u306f\u300c\u3088\u308a\u9ad8\u901f\u3067\u3001\u304b\u3064\u5168\u4e8c\u91cd\u304c\u512a\u5148\u3055\u308c\u308b\u300d\u3068\u7406\u89e3\u3057\u3066\u304a\u3051\u3070\u5341\u5206\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u81ea\u52d5\u8a2d\u5b9a\u306e\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u4fe1\u901f\u5ea6\u30fb\u30e2\u30fc\u30c9\u3092\u81ea\u52d5\u306b\u4efb\u305b\u308b\u5834\u5408\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Catalyst(config)# interface FastEthernet 0\/1\nCatalyst(config-if)# speed auto\nCatalyst(config-if)# duplex auto<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306e\u30c8\u30e9\u30d6\u30eb<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306f\u4fbf\u5229\u3067\u3059\u304c\u3001\u76f8\u624b\u304c\u3053\u306e\u6a5f\u80fd\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u3084\u3001\u624b\u52d5\u3067\u56fa\u5b9a\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306b\u554f\u984c\u304c\u8d77\u3053\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001\u7247\u65b9\u304c \u5168\u4e8c\u91cd\u901a\u4fe1 \u306b\u56fa\u5b9a\u3055\u308c\u3066\u3044\u3066\u3001\u3082\u3046\u7247\u65b9\u304c \u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3 \u306e\u307e\u307e\u3060\u3068\u3001\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u5074\u306f\u534a\u4e8c\u91cd\u3092\u9078\u3093\u3067\u3057\u307e\u3046\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092<strong><span class=\"swl-marker mark_yellow\">\u300c\u30c7\u30e5\u30d7\u30ec\u30c3\u30af\u30b9\u4e0d\u4e00\u81f4\u300d<\/span><\/strong>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c7\u30e5\u30d7\u30ec\u30c3\u30af\u30b9\u4e0d\u4e00\u81f4\u304c\u8d77\u304d\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c8\u30e9\u30d6\u30eb\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><span class=\"swl-marker mark_yellow\">\u901a\u5e38\u306e\u30c7\u30fc\u30bf\u901a\u4fe1\uff1a\u901f\u5ea6\u4f4e\u4e0b<\/span><\/strong>\uff08\u300c\u306a\u3093\u3060\u304b\u9045\u3044\u300d\u7a0b\u5ea6\uff09<\/li>\n\n\n\n<li><strong><span class=\"swl-marker mark_yellow\">\u97f3\u58f0\u901a\u8a71\u3084\u30d3\u30c7\u30aa\u4f1a\u8b70\uff1a\u54c1\u8cea\u52a3\u5316<\/span><\/strong>\uff08\u97f3\u58f0\u304c\u9014\u5207\u308c\u308b\u3001\u6620\u50cf\u304c\u4e71\u308c\u308b\u306a\u3069\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u306b\u97f3\u58f0\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3067\u306f\u534a\u4e8c\u91cd\u306e\u5236\u7d04\u304c\u81f4\u547d\u7684\u3068\u306a\u308a\u3001\u696d\u52d9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u3068\u3063\u3066\u300c\u8aa4\u3063\u3066\u534a\u4e8c\u91cd\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u300d\u3053\u3068\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300c\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u304c\u5931\u6557\u3059\u308b\u3068\u3069\u3046\u306a\u308b\u304b\u300d\u300c\u5168\u4e8c\u91cd\u3068\u534a\u4e8c\u91cd\u306e\u9055\u3044\u306f\u4f55\u304b\u300d\u304c\u3088\u304f\u554f\u308f\u308c\u308b\u306e\u3067\u3001\u3057\u3063\u304b\u308a\u6574\u7406\u3057\u3066\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30d5\u30ed\u30fc\u5236\u5fa1\u306e\u5f79\u5272<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b9\u30a4\u30c3\u30c1\u306f\u3001\u53d7\u4fe1\u3057\u305f\u30d5\u30ec\u30fc\u30e0\u3092\u4e00\u5ea6 <strong><span class=\"swl-marker mark_yellow\">\u30d0\u30c3\u30d5\u30a1\u30e1\u30e2\u30ea<\/span><\/strong> \u306b\u4fdd\u5b58\u3057\u3001MAC\u30a2\u30c9\u30ec\u30b9\u30c6\u30fc\u30d6\u30eb\u3092\u53c2\u7167\u3057\u3066\u5b9b\u5148\u3078\u8ee2\u9001\u3057\u307e\u3059\u3002\u30d5\u30ec\u30fc\u30e0\u304c\u8ee2\u9001\u3055\u308c\u308b\u3068\u3001\u30d0\u30c3\u30d5\u30a1\u304b\u3089\u306f\u524a\u9664\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001\u5927\u91cf\u306e\u30d5\u30ec\u30fc\u30e0\u304c\u4e00\u5ea6\u306b\u5230\u7740\u3059\u308b\u3068\u3001\u30d0\u30c3\u30d5\u30a1\u304c\u4e00\u676f\u306b\u306a\u3063\u3066\u5165\u308a\u304d\u3089\u306a\u3044\u30d5\u30ec\u30fc\u30e0\u306f\u7834\u68c4\u3055\u308c\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3053\u306e\u3068\u304dTCP\u901a\u4fe1\u3067\u3042\u308c\u3070\u518d\u9001\u51e6\u7406\u304c\u884c\u308f\u308c\u307e\u3059\u304c\u3001\u305d\u306e\u5206\u9045\u5ef6\u304c\u767a\u751f\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u5fdc\u7b54\u304c\u60aa\u304f\u306a\u308b\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3046\u3057\u305f\u554f\u984c\u3092\u9632\u3050\u305f\u3081\u306b\u5c0e\u5165\u3055\u308c\u3066\u3044\u308b\u306e\u304c <strong><span class=\"swl-marker mark_yellow\">\u30d5\u30ed\u30fc\u5236\u5fa1<\/span><\/strong> \u3067\u3059\u3002\u30d5\u30ed\u30fc\u5236\u5fa1\u306f\u3001\u30b9\u30a4\u30c3\u30c1\u306e\u30d0\u30c3\u30d5\u30a1\u304c\u6ea2\u308c\u308b\u524d\u306b\u3001\u9001\u4fe1\u5143\u306b\u300c\u3061\u3087\u3063\u3068\u5f85\u3063\u3066\u300d\u3068\u77e5\u3089\u305b\u3066\u9001\u4fe1\u3092\u6291\u5236\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d5\u30ed\u30fc\u5236\u5fa1\u306e\u65b9\u6cd5\u306f\u3001\u534a\u4e8c\u91cd\u901a\u4fe1\u3068\u5168\u4e8c\u91cd\u901a\u4fe1\u3067\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u534a\u4e8c\u91cd\u901a\u4fe1\u3067\u306e\u30d5\u30ed\u30fc\u5236\u5fa1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u534a\u4e8c\u91cd\u901a\u4fe1\u3067\u306f <strong><span class=\"swl-marker mark_yellow\">\u30d0\u30c3\u30af\u30d7\u30ec\u30c3\u30b7\u30e3<\/span><\/strong> \u3068\u547c\u3070\u308c\u308b\u4ed5\u7d44\u307f\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d0\u30c3\u30d5\u30a1\u304c\u9650\u754c\u306b\u8fd1\u3065\u304f\u3068\u3001\u30b9\u30a4\u30c3\u30c1\u306f <strong><span class=\"swl-marker mark_yellow\">\u30b8\u30e3\u30e0\u4fe1\u53f7<\/span><\/strong> \u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u53d7\u3051\u305f\u9001\u4fe1\u5074\u306f CSMA\/CD\u306e\u30eb\u30fc\u30eb \u306b\u5f93\u3044\u3001\u30e9\u30f3\u30c0\u30e0\u306a\u6642\u9593\u3060\u3051\u5f85\u6a5f\u3057\u3066\u304b\u3089\u518d\u3073\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306f\u3061\u3087\u3046\u3069\u3001\u6df7\u96d1\u3057\u305f\u9053\u8def\u306b\u300c\u901a\u884c\u6b62\u3081\u300d\u306e\u4fe1\u53f7\u3092\u4e00\u6642\u7684\u306b\u51fa\u3057\u3066\u3001\u8eca\uff08\u30d5\u30ec\u30fc\u30e0\uff09\u306e\u6d41\u308c\u3092\u6291\u5236\u3059\u308b\u30a4\u30e1\u30fc\u30b8\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5168\u4e8c\u91cd\u901a\u4fe1\u3067\u306e\u30d5\u30ed\u30fc\u5236\u5fa1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5168\u4e8c\u91cd\u901a\u4fe1\u3067\u306f <strong><span class=\"swl-marker mark_yellow\">IEEE802.3x\u30d5\u30ed\u30fc\u5236\u5fa1<\/span><\/strong> \u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d0\u30c3\u30d5\u30a1\u304c\u6ea2\u308c\u305d\u3046\u306b\u306a\u308b\u3068\u3001\u30b9\u30a4\u30c3\u30c1\u306f\u9001\u4fe1\u5074\u306b\u5bfe\u3057\u3066 <strong><span class=\"swl-marker mark_yellow\">PAUSE\u30d5\u30ec\u30fc\u30e0<\/span><\/strong> \u3092\u9001\u308a\u307e\u3059\u3002\u9001\u4fe1\u5074\u306f\u3053\u306e\u30d5\u30ec\u30fc\u30e0\u306b\u66f8\u304b\u308c\u305f\u6642\u9593\u3060\u3051\u9001\u4fe1\u3092\u4e00\u6642\u505c\u6b62\u3057\u307e\u3059\u3002\u30d0\u30c3\u30d5\u30a1\u306b\u4f59\u88d5\u304c\u623b\u308c\u3070\u3001\u30b9\u30a4\u30c3\u30c1\u306f <span class=\"swl-marker mark_yellow\"><strong>PAUSE\u89e3\u9664<\/strong> <\/span>\u3092\u901a\u77e5\u3057\u3001\u9001\u4fe1\u3092\u518d\u958b\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3064\u307e\u308a\u3001\u534a\u4e8c\u91cd\u306e\u3088\u3046\u306b\u300c\u3076\u3064\u304b\u3063\u305f\u304b\u3089\u3084\u308a\u76f4\u3059\u300d\u306e\u3067\u306f\u306a\u304f\u3001\u5168\u4e8c\u91cd\u3067\u306f\u300c\u3061\u3087\u3063\u3068\u5f85\u3063\u3066\u300d\u3068\u76f4\u63a5\u6307\u793a\u3059\u308b\u65b9\u5f0f\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u52b9\u7387\u7684\u306b\u5236\u5fa1\u3067\u304d\u308b\u70b9\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u56fa\u5b9a\u8a2d\u5b9a\u3068\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306e\u9078\u629e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d5\u30ed\u30fc\u5236\u5fa1\u3092\u7406\u89e3\u3059\u308b\u4e0a\u3067\u3001\u3082\u3046\u4e00\u3064\u91cd\u8981\u306a\u306e\u304c \u300c\u901a\u4fe1\u30e2\u30fc\u30c9\u306e\u8a2d\u5b9a\u65b9\u6cd5\u300d \u3067\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u7bc9\u3067\u306f\u300c\u56fa\u5b9a\u8a2d\u5b9a\u300d\u3068\u300c\u30aa\u30fc\u30c8\u30cd\u30b4\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\uff08\u81ea\u52d5\u8a2d\u5b9a\uff09\u300d\u306e\u3069\u3061\u3089\u3092\u9078\u3076\u304b\u3067\u60a9\u3080\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u306fCisco\u306e\u516c\u5f0f\u3067\u3082\u300c\u56fa\u5b9a\u30fbAuto\u3069\u3061\u3089\u304c\u63a8\u5968\u300d\u3068\u3044\u3046\u7b54\u3048\u306f\u3042\u308a\u307e\u305b\u3093\u3002<br>\u91cd\u8981\u306a\u306e\u306f <strong><span class=\"swl-marker mark_yellow\">\u4e21\u7aef\u306e\u6a5f\u5668\u3067\u540c\u3058\u8a2d\u5b9a\u3092\u4f7f\u3046\u3053\u3068<\/span><\/strong> \u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee3\u8868\u7684\u306a\u8a2d\u8a08\u30dd\u30ea\u30b7\u30fc\u3092\u6574\u7406\u3059\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u63a5\u7d9a\u306e\u7a2e\u985e<\/th><th>\u8a2d\u5b9a\u65b9\u6cd5<\/th><th>\u7406\u7531<\/th><\/tr><\/thead><tbody><tr><td>NW\u6a5f\u5668 \u21d4 NW\u6a5f\u5668<\/td><td>Auto \u21d4 Auto<\/td><td>\u81ea\u52d5\u6700\u9069\u5316\u306e\u7d50\u679c\u3092\u78ba\u8a8d\u3067\u304d\u308b<\/td><\/tr><tr><td>\u30b9\u30a4\u30c3\u30c1 \u21d4 PC<\/td><td>Auto \u21d4 Auto<\/td><td>PC\u306eNIC\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067Auto<\/td><\/tr><tr><td>\u30b9\u30a4\u30c3\u30c1 \u21d4 \u30b5\u30fc\u30d0<\/td><td>\u30b5\u30fc\u30d0\u5074\u306b\u5408\u308f\u305b\u308b\uff08\u539f\u5247\u306fAuto\uff09<\/td><td>\u30b5\u30fc\u30d0\u304c\u56fa\u5b9a\u306e\u5834\u5408\u306f\u5408\u308f\u305b\u308b<\/td><\/tr><tr><td>NW\u6a5f\u5668 \u21d4 ONU<\/td><td>ONU\u5074\u306b\u5408\u308f\u305b\u308b<\/td><td>\u30ad\u30e3\u30ea\u30a2\u6a5f\u5668\u306e\u8a2d\u5b9a\u306b\u5f93\u3046\u5fc5\u8981\u304c\u3042\u308b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u7279\u306b\u91cd\u8981\u306a\u306e\u306f\u300c\u30e2\u30fc\u30c9\u306e\u4e0d\u4e00\u81f4\u3092\u907f\u3051\u308b\u3053\u3068\u300d\u3067\u3059\u3002\u7247\u65b9\u304c\u56fa\u5b9a\u3067\u7247\u65b9\u304cAuto\u3060\u3068\u3001Auto\u5074\u304c\u8aa4\u3063\u3066\u534a\u4e8c\u91cd\u3092\u9078\u3093\u3067\u3057\u307e\u3044\u3001\u30c7\u30e5\u30d7\u30ec\u30c3\u30af\u30b9\u4e0d\u4e00\u81f4 \u304c\u8d77\u3053\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e0d\u4e00\u81f4\u3092\u907f\u3051\u308b\u305f\u3081\u306e\u5b9f\u8df5\u7684\u306a\u65b9\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306e\u904b\u7528\u3067\u306f\u300c\u307e\u305aAuto\u3067\u63a5\u7d9a\u3057\u3066\u3001\u7d50\u679c\u3092\u78ba\u8a8d\u3059\u308b\u300d\u3053\u3068\u304c\u4e00\u756a\u5b89\u5168\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Auto\u3067\u63a5\u7d9a\u3057\u3066\u534a\u4e8c\u91cd\u306b\u306a\u3063\u305f\u5834\u5408 \u2192 \u76f8\u624b\u306f\u56fa\u5b9a\u8a2d\u5b9a\u306e\u53ef\u80fd\u6027\u304c\u9ad8\u3044<\/li>\n\n\n\n<li>Auto\u3067\u5168\u4e8c\u91cd\u306b\u306a\u3063\u305f\u5834\u5408 \u2192 \u76f8\u624b\u5074\u306e\u8a2d\u5b9a\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u518d\u78ba\u8a8d\u3067\u304d\u308b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u76f8\u624b\u6a5f\u5668\u306e\u8a2d\u5b9a\u30df\u30b9\u3092\u65e9\u671f\u306b\u898b\u629c\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30b5\u30fc\u30d0\u3084\u30ad\u30e3\u30ea\u30a2\u6a5f\u5668\u3068\u63a5\u7d9a\u3059\u308b\u5834\u5408\u3082\u3001\u3053\u306e\u624b\u9806\u3092\u8e0f\u3081\u3070\u30c8\u30e9\u30d6\u30eb\u3092\u9632\u304e\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a66\u9a13\u3067\u306f\u300c\u30d5\u30ed\u30fc\u5236\u5fa1\u306e\u4ed5\u7d44\u307f\u300d\u300c\u534a\u4e8c\u91cd\u3068\u5168\u4e8c\u91cd\u3067\u7570\u306a\u308b\u52d5\u4f5c\u300d\u300c\u30c7\u30e5\u30d7\u30ec\u30c3\u30af\u30b9\u4e0d\u4e00\u81f4\u306e\u30ea\u30b9\u30af\u300d\u304c\u554f\u308f\u308c\u3084\u3059\u3044\u306e\u3067\u3001\u6574\u7406\u3057\u3066\u62bc\u3055\u3048\u3066\u304a\u304f\u3068\u5b89\u5fc3\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u25c6\u307e\u3068\u3081\u30b9\u30e9\u30a4\u30c9<\/h2>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/02\/Ethernet-LAN\uff08\u901a\u4fe1\u65b9\u5f0f\u30fb\u5236\u5fa1\uff09.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Ethernet LAN\uff08\u901a\u4fe1\u65b9\u5f0f\u30fb\u5236\u5fa1\uff09\u306e\u57cb\u3081\u8fbc\u307f\u3002\"><\/object><a id=\"wp-block-file--media-351711b5-3ed4-4992-87e3-c0bcba63b7ef\" href=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/02\/Ethernet-LAN\uff08\u901a\u4fe1\u65b9\u5f0f\u30fb\u5236\u5fa1\uff09.pdf\">Ethernet LAN\uff08\u901a\u4fe1\u65b9\u5f0f\u30fb\u5236\u5fa1\uff09<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>CSMA\/CD\u3068\u306f\u4f55\u304b CSMA\/CD\u306f\u300cCarrier Sense Multiple Access with Collision Detection\u300d\u306e\u7565\u3067\u3001\u65e5\u672c\u8a9e\u306b\u3059\u308b\u3068\u300c\u642c\u9001\u6ce2\u611f\u77e5\u591a\u91cd\u30a2\u30af\u30bb\u30b9\u30fb\u885d\u7a81\u691c\u51fa\u65b9\u5f0f\u300d\u3068\u547c\u3070 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