{"id":5562,"date":"2025-08-09T19:42:26","date_gmt":"2025-08-09T10:42:26","guid":{"rendered":"https:\/\/sky-peace.net\/?p=5562"},"modified":"2025-08-09T19:42:26","modified_gmt":"2025-08-09T10:42:26","slug":"ethanet","status":"publish","type":"post","link":"https:\/\/sky-peace.net\/certified\/ethanet\/","title":{"rendered":"\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u5b8c\u5168\u89e3\u8aac\u2502\u30d5\u30ec\u30fc\u30e0\u69cb\u6210\u30fbPoE\u30fb\u885d\u7a81\u56de\u907f\u30fb\u30ae\u30ac\u30d3\u30c3\u30c8\u30fbFDDI\u30fbTDMA\u30fbATM\u307e\u3067\u7db2\u7f85"},"content":{"rendered":"<p>\u30d1\u30bd\u30b3\u30f3\u540c\u58eb\u3084\u30d7\u30ea\u30f3\u30bf\u3001\u30b5\u30fc\u30d0\u306a\u3069\u3092\u3064\u306a\u3050\u3068\u304d\u3001\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u306b\u4f7f\u308f\u308c\u308b\u306e\u304c\u300c\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u300d\u3067\u3059\u3002LAN\u30b1\u30fc\u30d6\u30eb\u3092\u5dee\u3057\u8fbc\u3081\u3070\u901a\u4fe1\u3067\u304d\u308b\u2015\u2015\u305d\u3093\u306a\u5f53\u305f\u308a\u524d\u306e\u4ed5\u7d44\u307f\u3082\u3001\u4e2d\u3092\u306e\u305e\u304f\u3068\u5b9f\u306f\u304b\u306a\u308a\u5965\u304c\u6df1\u3044\u3093\u3067\u3059\u3002<\/p>\n<p>\u57fa\u672c\u60c5\u5831\u3084\u5fdc\u7528\u60c5\u5831\u306e\u8a66\u9a13\u3067\u306f\u3001\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e<strong>\u30d5\u30ec\u30fc\u30e0\u69cb\u6210<\/strong>\u3084<strong>PoE\uff08Power over Ethernet\uff09<\/strong>\u3001<strong>\u885d\u7a81\u56de\u907f\uff08CSMA\/CD\uff09<\/strong>\u3001<strong>\u30ae\u30ac\u30d3\u30c3\u30c8\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8<\/strong>\u3068\u3044\u3063\u305f\u5b9a\u756a\u30c6\u30fc\u30de\u306b\u52a0\u3048\u3001<strong>FDDI<\/strong>\u3001<strong>TDMA<\/strong>\u3001<strong>ATM<\/strong>\u306a\u3069\u6b74\u53f2\u7684\u306a\u65b9\u5f0f\u307e\u3067\u5e45\u5e83\u304f\u51fa\u984c\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6280\u8853\u3092<strong>\u57fa\u790e\u304b\u3089\u9806\u756a\u306b\u6574\u7406<\/strong>\u3057\u3001<strong>\u4ed5\u7d44\u307f\u3092\u8ad6\u7406\u7684\u306b\u7406\u89e3\u3067\u304d\u308b\u6d41\u308c<\/strong>\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u8077\u5834\u3084\u65e5\u5e38\u751f\u6d3b\u3067\u306e\u5177\u4f53\u7684\u306a\u6d3b\u7528\u4f8b\u3082\u4ea4\u3048\u3066\u3001\u300c\u3042\u3042\u3001\u3060\u304b\u3089\u3053\u3046\u3044\u3046\u8a2d\u8a08\u306b\u306a\u3063\u3066\u308b\u306e\u304b\uff01\u300d\u3068\u7d0d\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002\u56f3\u3084\u8868\u3082\u305f\u304f\u3055\u3093\u4f7f\u3046\u306e\u3067\u3001\u30a4\u30e1\u30fc\u30b8\u3057\u306a\u304c\u3089\u899a\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u8a66\u9a13\u52c9\u5f37\u3092\u3057\u306a\u304c\u3089\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u9762\u767d\u3055\u3084\u201c\u4f7f\u3048\u308b\u77e5\u8b58\u201d\u3082\u4e00\u7dd2\u306b\u8eab\u306b\u3064\u3051\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e\u57fa\u672c\u6982\u8981\u3068\u9032\u5316\u2502LAN\u901a\u4fe1\u898f\u683c\u306e\u6b74\u53f2\u3068\u8a66\u9a13\u983b\u51fa\u30dd\u30a4\u30f3\u30c8<\/h2>\n<p>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\uff08Ethernet\uff09\u306f\u3001LAN\uff08Local Area Network\uff09\u3067\u6700\u3082\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u901a\u4fe1\u898f\u683c\u3067\u3059\u30021970\u5e74\u4ee3\u306b\u30bc\u30ed\u30c3\u30af\u30b9\u793e\u306e\u30d1\u30ed\u30a2\u30eb\u30c8\u7814\u7a76\u6240\u3067\u958b\u767a\u3055\u308c\u3001\u305d\u306e\u5f8cIEEE 802.3\u3068\u3057\u3066\u6a19\u6e96\u5316\u3055\u308c\u307e\u3057\u305f\u3002\u73fe\u5728\u3067\u3082\u3001\u30aa\u30d5\u30a3\u30b9\u30fb\u5bb6\u5ead\u30fb\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u306a\u3069\u3042\u3089\u3086\u308b\u5834\u6240\u3067\u6d3b\u8e8d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u6709\u7dda\u901a\u4fe1<\/strong>\uff1a\u30c4\u30a4\u30b9\u30c8\u30da\u30a2\u30b1\u30fc\u30d6\u30eb\u3084\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u3092\u5229\u7528<\/li>\n<li><strong>\u30d1\u30b1\u30c3\u30c8\u901a\u4fe1<\/strong>\uff1a\u30c7\u30fc\u30bf\u3092\u5c0f\u3055\u306a\u5358\u4f4d\uff08\u30d5\u30ec\u30fc\u30e0\uff09\u306b\u5206\u3051\u3066\u9001\u4fe1<\/li>\n<li><strong>\u898f\u683c\u306e\u4e16\u4ee3\u4ea4\u4ee3<\/strong>\uff1a10Mbps \u2192 100Mbps \u2192 1Gbps \u2192 10Gbps\u2026\u3068\u9032\u5316<\/li>\n<\/ul>\n<p><strong>\u8a66\u9a13\u3067\u306e\u72d9\u308f\u308c\u30dd\u30a4\u30f3\u30c8<\/strong><\/p>\n<ol>\n<li>\u901f\u5ea6\u3068\u898f\u683c\u306e\u5bfe\u5fdc\uff0810BASE-T\u3001100BASE-TX\u30011000BASE-T\u306a\u3069\uff09<\/li>\n<li>\u4f1d\u9001\u5a92\u4f53\uff08UTP\u30b1\u30fc\u30d6\u30eb\u306e\u30ab\u30c6\u30b4\u30ea\u3084\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u306e\u7a2e\u5225\uff09<\/li>\n<li>\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u65b9\u5f0f\uff08CSMA\/CD\u306e\u4ed5\u7d44\u307f\uff09<\/li>\n<\/ol>\n<table border=\"1\" cellpadding=\"5\">\n<tr>\n<th>\u4e16\u4ee3<\/th>\n<th>\u898f\u683c\u4f8b<\/th>\n<th>\u6700\u5927\u901f\u5ea6<\/th>\n<th>\u5a92\u4f53<\/th>\n<th>\u4e3b\u306a\u7528\u9014<\/th>\n<\/tr>\n<tr>\n<td>\u7b2c1\u4e16\u4ee3<\/td>\n<td>10BASE-5, 10BASE-T<\/td>\n<td>10Mbps<\/td>\n<td>\u540c\u8ef8\/UTP<\/td>\n<td>\u521d\u671fLAN\u3001\u7814\u7a76\u6240<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c2\u4e16\u4ee3<\/td>\n<td>100BASE-TX<\/td>\n<td>100Mbps<\/td>\n<td>UTP Cat5<\/td>\n<td>\u30aa\u30d5\u30a3\u30b9LAN<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c3\u4e16\u4ee3<\/td>\n<td>1000BASE-T<\/td>\n<td>1Gbps<\/td>\n<td>UTP Cat5e\/Cat6<\/td>\n<td>\u30b5\u30fc\u30d0\u63a5\u7d9a\u3001\u5bb6\u5eadLAN<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c4\u4e16\u4ee3<\/td>\n<td>10GBASE-T<\/td>\n<td>10Gbps<\/td>\n<td>UTP Cat6a\/\u5149<\/td>\n<td>\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc<\/td>\n<\/tr>\n<\/table>\n<p><strong>\u5b9f\u751f\u6d3b\u306e\u4f8b\uff1a<\/strong>\u81ea\u5b85\u306eWi-Fi\u30eb\u30fc\u30bf\u30fc\u3068\u30d1\u30bd\u30b3\u30f3\u3092LAN\u30b1\u30fc\u30d6\u30eb\u3067\u3064\u306a\u3044\u3060\u3068\u304d\u3001\u901f\u5ea6\u304c\u300c1.0Gbps\u300d\u3068\u8868\u793a\u3055\u308c\u305f\u3089\u3001\u305d\u308c\u306f1000BASE-T\u3067\u901a\u4fe1\u3057\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u8077\u5834\u3067\u52d5\u753b\u7de8\u96c6\u3084\u5927\u5bb9\u91cf\u30d5\u30a1\u30a4\u30eb\u306e\u3084\u308a\u53d6\u308a\u3092\u3057\u3066\u3044\u308b\u4eba\u306f\u300110GBASE-T\u5bfe\u5fdc\u306e\u30b1\u30fc\u30d6\u30eb\u3084\u30b9\u30a4\u30c3\u30c1\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30d5\u30ec\u30fc\u30e0\u69cb\u6210\u306e\u4ed5\u7d44\u307f\u2502\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5f79\u5272\u3068\u8a66\u9a13\u3067\u306e\u899a\u3048\u65b9<\/h2>\n<p>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u3067\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u3068\u304d\u3001\u60c5\u5831\u306f\u300c\u30d5\u30ec\u30fc\u30e0\u300d\u3068\u547c\u3070\u308c\u308b\u4e00\u5b9a\u306e\u69cb\u9020\u3092\u6301\u3064\u5358\u4f4d\u306b\u307e\u3068\u3081\u3089\u308c\u307e\u3059\u3002\u30d5\u30ec\u30fc\u30e0\u306f\u3001\u9001\u308a\u5148\u3084\u9001\u308a\u5143\u306e\u60c5\u5831\u3001\u30c7\u30fc\u30bf\u672c\u4f53\u3001\u305d\u3057\u3066\u8aa4\u308a\u691c\u51fa\u7528\u306e\u60c5\u5831\u306a\u3069\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<table border=\"1\" cellpadding=\"5\">\n<tr>\n<th>\u30d5\u30a3\u30fc\u30eb\u30c9<\/th>\n<th>\u30b5\u30a4\u30ba\uff08\u30d0\u30a4\u30c8\uff09<\/th>\n<th>\u5185\u5bb9<\/th>\n<\/tr>\n<tr>\n<td>\u30d7\u30ec\u30a2\u30f3\u30d6\u30eb<\/td>\n<td>7<\/td>\n<td>\u540c\u671f\u7528\u30d3\u30c3\u30c8\u5217\uff08101010\u2026\uff09<\/td>\n<\/tr>\n<tr>\n<td>SFD\uff08Start Frame Delimiter\uff09<\/td>\n<td>1<\/td>\n<td>\u30d5\u30ec\u30fc\u30e0\u306e\u958b\u59cb\u3092\u793a\u3059<\/td>\n<\/tr>\n<tr>\n<td>\u5b9b\u5148MAC\u30a2\u30c9\u30ec\u30b9<\/td>\n<td>6<\/td>\n<td>\u53d7\u4fe1\u5148\u306e\u6a5f\u5668\u3092\u7279\u5b9a<\/td>\n<\/tr>\n<tr>\n<td>\u9001\u4fe1\u5143MAC\u30a2\u30c9\u30ec\u30b9<\/td>\n<td>6<\/td>\n<td>\u9001\u4fe1\u5143\u306e\u6a5f\u5668\u3092\u7279\u5b9a<\/td>\n<\/tr>\n<tr>\n<td>\u30bf\u30a4\u30d7\uff0f\u9577\u3055<\/td>\n<td>2<\/td>\n<td>\u4e0a\u4f4d\u30d7\u30ed\u30c8\u30b3\u30eb\u7a2e\u5225\u3084\u30c7\u30fc\u30bf\u9577<\/td>\n<\/tr>\n<tr>\n<td>\u30c7\u30fc\u30bf<\/td>\n<td>46\u301c1500<\/td>\n<td>\u5b9f\u969b\u306e\u9001\u4fe1\u30c7\u30fc\u30bf\uff08\u30da\u30a4\u30ed\u30fc\u30c9\uff09<\/td>\n<\/tr>\n<tr>\n<td>FCS\uff08Frame Check Sequence\uff09<\/td>\n<td>4<\/td>\n<td>CRC\u306b\u3088\u308b\u8aa4\u308a\u691c\u51fa<\/td>\n<\/tr>\n<\/table>\n<ul>\n<li><strong>\u30d7\u30ec\u30a2\u30f3\u30d6\u30eb\u3068SFD<\/strong>\uff1a\u53d7\u4fe1\u6a5f\u3068\u306e\u540c\u671f\u3092\u53d6\u308b\u5f79\u5272\u3002\u8a66\u9a13\u3067\u306f\u983b\u51fa\u3002<\/li>\n<li><strong>MAC\u30a2\u30c9\u30ec\u30b9<\/strong>\uff1a48\u30d3\u30c3\u30c8\u306e\u30e6\u30cb\u30fc\u30af\u8b58\u5225\u5b50\u3002\u524d\u534a24\u30d3\u30c3\u30c8\u306f\u30d9\u30f3\u30c0ID\u3001\u5f8c\u534a\u306f\u88fd\u9020\u756a\u53f7\u3002<\/li>\n<li><strong>FCS<\/strong>\uff1a\u8aa4\u308a\u691c\u51fa\u306e\u307f\u884c\u3044\u3001\u8a02\u6b63\u306f\u3057\u306a\u3044\uff08\u8a02\u6b63\u306f\u4e0a\u4f4d\u5c64\u3067\u5b9f\u65bd\uff09\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9f\u751f\u6d3b\u306e\u4f8b\uff1a<\/strong>\u5b85\u914d\u4fbf\u3067\u4f8b\u3048\u308b\u3068\u3001\u5b9b\u5148MAC\u30a2\u30c9\u30ec\u30b9\u306f\u300c\u9001\u308a\u5148\u306e\u4f4f\u6240\u300d\u3001\u9001\u4fe1\u5143MAC\u30a2\u30c9\u30ec\u30b9\u306f\u300c\u5dee\u51fa\u4eba\u4f4f\u6240\u300d\u3001\u30c7\u30fc\u30bf\u306f\u300c\u8377\u7269\u306e\u4e2d\u8eab\u300d\u3001FCS\u306f\u300c\u691c\u54c1\u7528\u30b7\u30fc\u30eb\u300d\u306b\u3042\u305f\u308a\u307e\u3059\u3002\u3053\u306e\u30b7\u30fc\u30eb\u3067\u4e0d\u826f\u304c\u898b\u3064\u304b\u308c\u3070\u914d\u9054\u306f\u6b62\u3081\u3089\u308c\u308b\u2500\u2500\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3082\u540c\u3058\u52d5\u304d\u3067\u3059\u3002<\/p>\n<h2>PoE\uff08Power over Ethernet\uff09\u306e\u4ed5\u7d44\u307f\u3068\u7a2e\u985e\u2502LAN\u30b1\u30fc\u30d6\u30eb\u3067\u96fb\u6e90\u4f9b\u7d66\u3059\u308b\u6280\u8853<\/h2>\n<p>PoE\uff08Power over Ethernet\uff09\u306f\u3001LAN\u30b1\u30fc\u30d6\u30eb1\u672c\u3067<strong>\u30c7\u30fc\u30bf\u901a\u4fe1\u3068\u96fb\u529b\u4f9b\u7d66\u3092\u540c\u6642\u306b\u884c\u3046<\/strong>\u6280\u8853\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u96fb\u6e90\u30b3\u30f3\u30bb\u30f3\u30c8\u304c\u306a\u3044\u5834\u6240\u3067\u3082\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3092\u52d5\u4f5c\u3055\u305b\u3089\u308c\u307e\u3059\u3002<\/p>\n<p><strong>\u4e3b\u306a\u7528\u9014<\/strong><\/p>\n<ul>\n<li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30ab\u30e1\u30e9\uff08\u76e3\u8996\u30ab\u30e1\u30e9\uff09<\/li>\n<li>\u7121\u7ddaLAN\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8<\/li>\n<li>IP\u96fb\u8a71\u6a5f<\/li>\n<li>\u5c0f\u578b\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6<\/li>\n<\/ul>\n<p><strong>PoE\u306e\u30e1\u30ea\u30c3\u30c8<\/strong><\/p>\n<ol>\n<li><strong>\u914d\u7dda\u304c\u30b7\u30f3\u30d7\u30eb<\/strong>\uff1aLAN\u30b1\u30fc\u30d6\u30eb\u3060\u3051\u3067\u901a\u4fe1\uff0b\u7d66\u96fb\u304c\u53ef\u80fd<\/li>\n<li><strong>\u8a2d\u7f6e\u5834\u6240\u306e\u81ea\u7531\u5ea6\u304c\u9ad8\u3044<\/strong>\uff1a\u5929\u4e95\u3084\u5c4b\u5916\u30dd\u30fc\u30eb\u306a\u3069\u96fb\u6e90\u304c\u53d6\u308a\u3065\u3089\u3044\u5834\u6240\u306b\u8a2d\u7f6e\u53ef\u80fd<\/li>\n<li><strong>\u5b89\u5168\u6027<\/strong>\uff1a\u898f\u683c\u4e0a\u3001\u975e\u5bfe\u5fdc\u6a5f\u5668\u306b\u306f\u7d66\u96fb\u3057\u306a\u3044\u4ed5\u7d44\u307f\u304c\u3042\u308b<\/li>\n<\/ol>\n<table border=\"1\" cellpadding=\"5\">\n<tr>\n<th>\u898f\u683c<\/th>\n<th>IEEE\u756a\u53f7<\/th>\n<th>\u6700\u5927\u7d66\u96fb\u96fb\u529b\uff08\u30dd\u30fc\u30c8\u5074\uff09<\/th>\n<th>\u5bfe\u5fdc\u6a5f\u5668\u4f8b<\/th>\n<\/tr>\n<tr>\n<td>PoE<\/td>\n<td>IEEE 802.3af<\/td>\n<td>15.4W<\/td>\n<td>IP\u96fb\u8a71\u3001AP<\/td>\n<\/tr>\n<tr>\n<td>PoE+<\/td>\n<td>IEEE 802.3at<\/td>\n<td>30W<\/td>\n<td>\u9ad8\u6027\u80fdAP\u3001PTZ\u30ab\u30e1\u30e9<\/td>\n<\/tr>\n<tr>\n<td>PoE++\uff08Type3\uff09<\/td>\n<td>IEEE 802.3bt<\/td>\n<td>60W<\/td>\n<td>LED\u7167\u660e\u3001\u5c0f\u578bPC<\/td>\n<\/tr>\n<tr>\n<td>PoE++\uff08Type4\uff09<\/td>\n<td>IEEE 802.3bt<\/td>\n<td>90W<\/td>\n<td>\u5927\u578b\u30c7\u30a3\u30b9\u30d7\u30ec\u30a4\u3001\u7523\u696d\u6a5f\u5668<\/td>\n<\/tr>\n<\/table>\n<p><strong>\u4ed5\u7d44\u307f\u306e\u6982\u8981<\/strong><\/p>\n<ul>\n<li><strong>PSE\uff08Power Sourcing Equipment\uff09<\/strong>\uff1a\u7d66\u96fb\u5074\uff08PoE\u5bfe\u5fdc\u30b9\u30a4\u30c3\u30c1\u3084\u30a4\u30f3\u30b8\u30a7\u30af\u30bf\uff09<\/li>\n<li><strong>PD\uff08Powered Device\uff09<\/strong>\uff1a\u53d7\u96fb\u5074\uff08PoE\u5bfe\u5fdcAP\u3084\u30ab\u30e1\u30e9\uff09<\/li>\n<li>PSE\u306fLAN\u30b1\u30fc\u30d6\u30eb\u306e\u7279\u5b9a\u30da\u30a2\u7dda\u306b\u76f4\u6d41\u96fb\u6d41\u3092\u6d41\u3057\u3001PD\u306f\u3053\u308c\u3092\u53d7\u3051\u53d6\u3063\u3066\u6a5f\u5668\u3092\u52d5\u4f5c\u3055\u305b\u308b<\/li>\n<\/ul>\n<p><strong>\u5b9f\u751f\u6d3b\u306e\u4f8b\uff1a<\/strong>\u30de\u30f3\u30b7\u30e7\u30f3\u306e\u30a8\u30f3\u30c8\u30e9\u30f3\u30b9\u306b\u3042\u308b\u9632\u72af\u30ab\u30e1\u30e9\u304c\u3001\u8fd1\u304f\u306b\u96fb\u6e90\u30b3\u30f3\u30bb\u30f3\u30c8\u306a\u3057\u3067\u52d5\u3044\u3066\u3044\u308b\u5834\u5408\u3001\u307b\u307c\u78ba\u5b9f\u306bPoE\u3067\u7d66\u96fb\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u914d\u7dda\u5de5\u4e8b\u3092\u6e1b\u3089\u3057\u3064\u3064\u3001\u6a5f\u5668\u3092\u597d\u304d\u306a\u5834\u6240\u306b\u7f6e\u3051\u308b\u306e\u304cPoE\u306e\u9b45\u529b\u3067\u3059\u3002<\/p>\n<h2>\u885d\u7a81\u56de\u907f\uff08CSMA\/CD\uff09\u306e\u4ed5\u7d44\u307f\u2502\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e\u901a\u4fe1\u5236\u5fa1\u3068\u8a66\u9a13\u983b\u51fa\u30dd\u30a4\u30f3\u30c8<\/h2>\n<p>CSMA\/CD\uff08Carrier Sense Multiple Access with Collision Detection\uff09\u306f\u3001\u521d\u671f\u306e\u6709\u7dda\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u3067\u4f7f\u308f\u308c\u305f<strong>\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u65b9\u5f0f<\/strong>\u3067\u3059\u3002\u8907\u6570\u306e\u7aef\u672b\u304c\u540c\u3058\u901a\u4fe1\u5a92\u4f53\u3092\u5171\u6709\u3059\u308b\u74b0\u5883\u3067\u3001<strong>\u30c7\u30fc\u30bf\u306e\u885d\u7a81\u3092\u691c\u51fa\u3057\u518d\u9001\u3059\u308b<\/strong>\u305f\u3081\u306b\u7528\u3044\u3089\u308c\u307e\u3059\u3002<\/p>\n<p><strong>CSMA\/CD\u306e\u52d5\u4f5c\u306e\u6d41\u308c<\/strong><\/p>\n<ol>\n<li><strong>Carrier Sense\uff08\u642c\u9001\u6ce2\u611f\u77e5\uff09<\/strong>\uff1a\u9001\u4fe1\u524d\u306b\u901a\u4fe1\u5a92\u4f53\uff08\u30b1\u30fc\u30d6\u30eb\uff09\u3092\u76e3\u8996\u3057\u3001\u307b\u304b\u306e\u7aef\u672b\u304c\u9001\u4fe1\u4e2d\u3067\u306a\u3044\u304b\u78ba\u8a8d<\/li>\n<li><strong>Multiple Access\uff08\u591a\u91cd\u30a2\u30af\u30bb\u30b9\uff09<\/strong>\uff1a\u7a7a\u3044\u3066\u3044\u308c\u3070\u9001\u4fe1\u958b\u59cb<\/li>\n<li><strong>Collision Detection\uff08\u885d\u7a81\u691c\u51fa\uff09<\/strong>\uff1a\u9001\u4fe1\u4e2d\u306b\u4ed6\u7aef\u672b\u306e\u4fe1\u53f7\u3068\u885d\u7a81\u3057\u305f\u3089\u3001\u5373\u5ea7\u306b\u9001\u4fe1\u505c\u6b62<\/li>\n<li><strong>\u518d\u9001\u5f85\u3061\uff08\u30d0\u30c3\u30af\u30aa\u30d5\uff09<\/strong>\uff1a\u30e9\u30f3\u30c0\u30e0\u306a\u6642\u9593\u5f85\u3063\u3066\u518d\u9001\u4fe1<\/li>\n<\/ol>\n<p><strong>\u30dd\u30a4\u30f3\u30c8<\/strong><\/p>\n<ul>\n<li>\u534a\u4e8c\u91cd\u901a\u4fe1\uff08Half Duplex\uff09\u3067\u306e\u307f\u4f7f\u7528<\/li>\n<li>\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6\u306e\u666e\u53ca\u306b\u3088\u308a\u3001\u73fe\u5728\u306f\u307b\u3068\u3093\u3069\u4f7f\u308f\u308c\u306a\u3044<\/li>\n<li>\u8a66\u9a13\u3067\u306f\u300cCSMA\/CD\uff1d\u885d\u7a81\u304c\u8d77\u304d\u305f\u3089\u691c\u51fa\u3057\u3066\u518d\u9001\u300d\u3068\u3044\u3046\u6d41\u308c\u3092\u62bc\u3055\u3048\u3066\u304a\u304f<\/li>\n<\/ul>\n<p><strong>CSMA\/CD\u306e\u52d5\u4f5c\u30a4\u30e1\u30fc\u30b8\uff08\u6587\u7ae0\u4f8b\u3048\uff09<\/strong><\/p>\n<ul>\n<li>\u901a\u4fe1\u8def\u3092\u9053\u8def\u306b\u4f8b\u3048\u308b\u3068\u3001\u8907\u6570\u306e\u8eca\uff08\u7aef\u672b\uff09\u304c\u540c\u3058\u8eca\u7dda\uff08\u901a\u4fe1\u8def\uff09\u3092\u8d70\u3063\u3066\u3044\u308b\u72b6\u614b<\/li>\n<li>\u8eca\u304c\u540c\u6642\u306b\u767a\u9032\u3059\u308b\u3068\u885d\u7a81\uff08\u30c7\u30fc\u30bf\u30b3\u30ea\u30b8\u30e7\u30f3\uff09\u304c\u8d77\u304d\u308b<\/li>\n<li>\u885d\u7a81\u3092\u691c\u77e5\u3057\u305f\u8eca\u306f\u4e00\u65e6\u505c\u6b62\u3057\u3001\u30e9\u30f3\u30c0\u30e0\u306a\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u518d\u3073\u8d70\u308a\u51fa\u3059<\/li>\n<\/ul>\n<p><strong>\u5b9f\u751f\u6d3b\u306e\u4f8b\uff1a<\/strong>\u53e4\u3044\u5171\u6709\u578b\u30cf\u30d6\uff08\u30ea\u30d4\u30fc\u30bf\u30cf\u30d6\uff09\u3092\u4f7f\u3063\u3066\u3044\u305f\u6642\u4ee3\u306f\u3001\u540c\u6642\u9001\u4fe1\u304c\u8d77\u304d\u308b\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901f\u5ea6\u304c\u6975\u7aef\u306b\u9045\u304f\u306a\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001\u307e\u3055\u306bCSMA\/CD\u306e\u518d\u9001\u5f85\u3061\u304c\u983b\u767a\u3057\u3066\u3044\u305f\u72b6\u614b\u3067\u3059\u3002<\/p>\n<h2>\u30ae\u30ac\u30d3\u30c3\u30c8\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e\u7279\u5fb4\u3068\u898f\u683c\u6bd4\u8f03\u25021Gbps\u8d85\u901a\u4fe1\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n<p>\u30ae\u30ac\u30d3\u30c3\u30c8\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\uff08Gigabit Ethernet\uff09\u306f\u3001\u6700\u59271Gbps\uff081000Mbps\uff09\u306e\u8ee2\u9001\u901f\u5ea6\u3092\u5b9f\u73fe\u3059\u308b\u9ad8\u901fLAN\u898f\u683c\u3067\u3059\u3002IEEE 802.3ab\uff08UTP\u30b1\u30fc\u30d6\u30eb\uff09\u3001IEEE 802.3z\uff08\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\uff09\u306a\u3069\u8907\u6570\u306e\u6d3e\u751f\u898f\u683c\u304c\u3042\u308a\u30011990\u5e74\u4ee3\u5f8c\u534a\u304b\u3089\u4f01\u696dLAN\u3084\u30b5\u30fc\u30d0\u63a5\u7d9a\u306e\u4e3b\u529b\u3068\u3057\u3066\u666e\u53ca\u3057\u307e\u3057\u305f\u3002<\/p>\n<table border=\"1\" cellpadding=\"5\">\n<tr>\n<th>\u898f\u683c<\/th>\n<th>IEEE\u756a\u53f7<\/th>\n<th>\u6700\u5927\u901f\u5ea6<\/th>\n<th>\u5a92\u4f53<\/th>\n<th>\u30b1\u30fc\u30d6\u30eb\u8981\u4ef6<\/th>\n<\/tr>\n<tr>\n<td>1000BASE-T<\/td>\n<td>IEEE 802.3ab<\/td>\n<td>1Gbps<\/td>\n<td>UTP\uff08\u9285\u7dda\uff09<\/td>\n<td>Cat5e\u4ee5\u4e0a<\/td>\n<\/tr>\n<tr>\n<td>1000BASE-SX<\/td>\n<td>IEEE 802.3z<\/td>\n<td>1Gbps<\/td>\n<td>\u5149\uff08\u77ed\u6ce2\u9577\uff09<\/td>\n<td>\u30de\u30eb\u30c1\u30e2\u30fc\u30c9\u5149\u30d5\u30a1\u30a4\u30d0\u30fc<\/td>\n<\/tr>\n<tr>\n<td>1000BASE-LX<\/td>\n<td>IEEE 802.3z<\/td>\n<td>1Gbps<\/td>\n<td>\u5149\uff08\u9577\u6ce2\u9577\uff09<\/td>\n<td>\u30b7\u30f3\u30b0\u30eb\u30e2\u30fc\u30c9\/\u30de\u30eb\u30c1\u30e2\u30fc\u30c9\u5149\u30d5\u30a1\u30a4\u30d0\u30fc<\/td>\n<\/tr>\n<tr>\n<td>1000BASE-CX<\/td>\n<td>IEEE 802.3z<\/td>\n<td>1Gbps<\/td>\n<td>\u540c\u8ef8<\/td>\n<td>\u77ed\u8ddd\u96e2\u63a5\u7d9a\u5411\u3051<\/td>\n<\/tr>\n<\/table>\n<ul>\n<li><strong>\u7279\u5fb4\u3068\u8a66\u9a13\u306e\u72d9\u3044\u76ee\uff1a<\/strong>\u5168\u4e8c\u91cd\u901a\u4fe1\uff08Full Duplex\uff09\u304c\u57fa\u672c\u3067CSMA\/CD\u306f\u4e0d\u8981\u3002<\/li>\n<li>100BASE-TX\u3068\u540c\u3058RJ-45\u30b3\u30cd\u30af\u30bf\u3092\u5229\u7528\u53ef\u80fd\uff08\u5f8c\u65b9\u4e92\u63db\u304c\u53d6\u308a\u3084\u3059\u3044\uff09\u3002<\/li>\n<li>\u9285\u7dda\u306fCat5e\u4ee5\u4e0a\u3092\u63a8\u5968\u3002Cat6\/Cat6a\u306a\u308910Gbps\u3078\u306e\u5e03\u77f3\u306b\u3082\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9f\u751f\u6d3b\u306e\u4f8b\uff1a<\/strong>PC\u306e\u30ea\u30f3\u30af\u901f\u5ea6\u304c\u300c1.0Gbps\u300d\u8868\u793a\u306a\u3089\u3001\u307b\u307c1000BASE-T\u3002NAS\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u6642\u9593\u77ed\u7e2e\u306b\u306f\u30ae\u30ac\u30d3\u30c3\u30c8\u5bfe\u5fdc\u30b9\u30a4\u30c3\u30c1\uff0b\u9069\u5207\u306a\u30b1\u30fc\u30d6\u30eb\u304c\u52b9\u304d\u307e\u3059\u3002<\/p>\n<h2>FDDI\uff08\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u5206\u6563\u578b\u30c7\u30fc\u30bf\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\uff09\u2502\u9ad8\u901fLAN\u306e\u5148\u99c6\u3051\u3068\u7279\u5fb4<\/h2>\n<p>FDDI\uff08Fiber Distributed Data Interface\uff09\u306f\u30011980\u5e74\u4ee3\u5f8c\u534a\u304b\u30891990\u5e74\u4ee3\u306b\u304b\u3051\u3066\u666e\u53ca\u3057\u305f<strong>\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u3092\u4f7f\u3063\u305f\u9ad8\u901fLAN\u898f\u683c<\/strong>\u3067\u3059\u3002\u6700\u5927\u901f\u5ea6\u306f100Mbps\u3067\u3001\u5f53\u6642\u306e\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\uff0810Mbps\uff09\u3088\u308a\u3082\u9ad8\u901f\u3060\u3063\u305f\u305f\u3081\u3001\u5927\u898f\u6a21LAN\u3084\u4f01\u696d\u306e\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u306b\u63a1\u7528\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li><strong>\u5c64\uff1a<\/strong>\u7269\u7406\u5c64\u30fb\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\uff08ISO 9314\u3001ANSI X3T9.5\uff09<\/li>\n<li><strong>\u5a92\u4f53\uff1a<\/strong>\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u3067\u9577\u8ddd\u96e2\u901a\u4fe1\u306b\u5f37\u3044<\/li>\n<li><strong>\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\uff1a<\/strong>\u30c8\u30fc\u30af\u30f3\u30d1\u30c3\u30b7\u30f3\u30b0\u65b9\u5f0f<\/li>\n<li><strong>\u5197\u9577\u69cb\u6210\uff1a<\/strong>\u30c7\u30e5\u30a2\u30eb\u30ea\u30f3\u30b0\u3067\u7247\u7cfb\u969c\u5bb3\u6642\u3082\u7d99\u7d9a\u901a\u4fe1<\/li>\n<\/ul>\n<p><strong>\u69cb\u6210\u30a4\u30e1\u30fc\u30b8\uff08\u6587\u7ae0\uff09\uff1a<\/strong>2\u672c\u306e\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u3067\u53cc\u65b9\u5411\u30ea\u30f3\u30b0\u3092\u69cb\u7bc9\u3002\u5e73\u5e38\u6642\u306f\u7247\u7cfb\u3001\u969c\u5bb3\u6642\u306f\u5f85\u6a5f\u7cfb\u306b\u81ea\u52d5\u5207\u66ff\u3057\u3066\u901a\u4fe1\u3092\u7dad\u6301\u3002<\/p>\n<p><strong>\u8a66\u9a13\u30c1\u30a7\u30c3\u30af\uff1a<\/strong>\u300c\u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u300d\u300c100Mbps\u300d\u300c\u30c8\u30fc\u30af\u30f3\u300d\u300c\u30c7\u30e5\u30a2\u30eb\u30ea\u30f3\u30b0\u300d\u3092\u30bb\u30c3\u30c8\u3067\u899a\u3048\u308b\u3002\u73fe\u5728\u306e\u73fe\u5834\u3067\u306f\u7a00\u3060\u304c\u3001\u8a2d\u8a08\u601d\u60f3\uff08\u5197\u9577\u30ea\u30f3\u30b0\uff09\u306f\u73fe\u4ee3\u306b\u3082\u901a\u3058\u308b\u3002<\/p>\n<h2>TDMA\uff08\u6642\u5206\u5272\u591a\u5143\u63a5\u7d9a\uff09\u306e\u4ed5\u7d44\u307f\u3068\u7528\u9014\u2502\u901a\u4fe1\u30c1\u30e3\u30cd\u30eb\u3092\u6642\u9593\u3067\u5206\u3051\u308b\u65b9\u5f0f<\/h2>\n<p>TDMA\uff08Time Division Multiple Access\uff09\u306f\u3001\u901a\u4fe1\u5a92\u4f53\u3092<strong>\u6642\u9593\u3067\u533a\u5207\u3063\u3066\u8907\u6570\u306e\u7aef\u672b\u304c\u5171\u6709\u3059\u308b<\/strong>\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u65b9\u5f0f\u3067\u3059\u30021\u3064\u306e\u5468\u6ce2\u6570\u5e2f\u3084\u901a\u4fe1\u8def\u3092\u30b9\u30ed\u30c3\u30c8\u3068\u547c\u3070\u308c\u308b\u6642\u9593\u67a0\u306b\u5206\u3051\u3001\u5404\u7aef\u672b\u306b\u9806\u756a\u306b\u5272\u308a\u5f53\u3066\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u540c\u3058\u7269\u7406\u30c1\u30e3\u30cd\u30eb\u3092\u6642\u9593\u7684\u306b\u5206\u5272\u3057\u3066\u5229\u7528<\/li>\n<li>\u30b9\u30ed\u30c3\u30c8\u5272\u308a\u5f53\u3066\u306f\u4e8b\u524d\u306b\u6c7a\u5b9a\uff08\u56fa\u5b9a\uff09\u307e\u305f\u306f\u52d5\u7684\u306b\u8abf\u6574\u53ef\u80fd<\/li>\n<li>\u5e72\u6e09\u304c\u5c11\u306a\u304f\u3001\u5e2f\u57df\u306e\u5229\u7528\u52b9\u7387\u304c\u9ad8\u3044<\/li>\n<li>\u4e3b\u306b<strong>\u7121\u7dda\u901a\u4fe1<\/strong>\u3084<strong>\u885b\u661f\u901a\u4fe1<\/strong>\u3067\u5229\u7528<\/li>\n<\/ul>\n<p><strong>\u8a66\u9a13\u3067\u306e\u72d9\u3044\u76ee\u30dd\u30a4\u30f3\u30c8\uff1a<\/strong>FDMA\uff08\u5468\u6ce2\u6570\u5206\u5272\uff09\u3084CDMA\uff08\u7b26\u53f7\u5206\u5272\uff09\u3068\u306e\u9055\u3044\u3001\u300c\u6642\u9593\u3092\u5206\u3051\u308b\uff1d\u9806\u756a\u9001\u4fe1\u300d\u3068\u3044\u3046\u767a\u60f3\u3002\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306eCSMA\/CD\u3068\u306f\u7570\u306a\u308a\u885d\u7a81\u3092\u524d\u63d0\u3068\u3057\u306a\u3044\u3002<\/p>\n<p><strong>TDMA\u306e\u52d5\u4f5c\u30a4\u30e1\u30fc\u30b8\uff08\u6587\u7ae0\uff09\uff1a<\/strong>\u8907\u6570\u4eba\u30671\u53f0\u306e\u30de\u30a4\u30af\u3092\u4f7f\u3063\u3066\u767a\u8a00\u3059\u308b\u3068\u304d\u3001\u300c\u3042\u306a\u305f\u306f1\u5206\u76ee\u3001\u79c1\u306f2\u5206\u76ee\u300d\u3068\u3044\u3046\u3088\u3046\u306b\u6642\u9593\u3092\u6c7a\u3081\u3066\u8a71\u3059\u30a4\u30e1\u30fc\u30b8\u3002\u304a\u4e92\u3044\u306e\u58f0\u304c\u304b\u3076\u3089\u306a\u3044\u306e\u3067\u3001\u5185\u5bb9\u306f\u30af\u30ea\u30a2\u306b\u4f1d\u308f\u308a\u307e\u3059\u3002<\/p>\n<p><strong>\u5b9f\u751f\u6d3b\u306e\u4f8b\uff1a<\/strong>\u65e72G\u643a\u5e2f\u96fb\u8a71\uff08GSM\u65b9\u5f0f\uff09\u3084\u3001\u4e00\u90e8\u306e\u885b\u661f\u96fb\u8a71\u3001\u30c7\u30b8\u30bf\u30eb\u7121\u7dda\u6a5f\u306fTDMA\u3092\u5229\u7528\u3002\u73fe\u4ee3\u3067\u3082\u822a\u7a7a\u6a5f\u901a\u4fe1\u3084\u7279\u6b8a\u5206\u91ce\u3067\u6d3b\u8e8d\u3002<\/p>\n<h2>ATM\uff08\u975e\u540c\u671f\u8ee2\u9001\u30e2\u30fc\u30c9\uff09\u306e\u7279\u5fb4\u3068\u30bb\u30eb\u69cb\u9020\u2502\u56fa\u5b9a\u9577\u30bb\u30eb\u3067\u9ad8\u901f\u8ee2\u9001\u3059\u308b\u901a\u4fe1\u65b9\u5f0f<\/h2>\n<p>ATM\uff08Asynchronous Transfer Mode\uff09\u306f\u30011980\u5e74\u4ee3\u5f8c\u534a\u306b\u767b\u5834\u3057\u305f<strong>\u56fa\u5b9a\u9577\u30bb\u30eb<\/strong>\u3092\u4f7f\u3046\u9ad8\u901f\u901a\u4fe1\u65b9\u5f0f\u3067\u3059\u3002\u97f3\u58f0\u3001\u30c7\u30fc\u30bf\u3001\u52d5\u753b\u306a\u3069\u7570\u306a\u308b\u7a2e\u985e\u306e\u60c5\u5831\u3092\u540c\u4e00\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u52b9\u7387\u3088\u304f\u8ee2\u9001\u3067\u304d\u3001\u304b\u3064\u3066\u306f\u5e83\u57df\u7db2\uff08WAN\uff09\u3084\u901a\u4fe1\u4e8b\u696d\u8005\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u57fa\u76e4\u3068\u3057\u3066\u4f7f\u308f\u308c\u307e\u3057\u305f\u3002<\/p>\n<ul>\n<li><strong>\u56fa\u5b9a\u9577\u30bb\u30eb\uff1a<\/strong>1\u30bb\u30eb\uff1d53\u30d0\u30a4\u30c8\uff08\u30d8\u30c3\u30c05B\uff0b\u30c7\u30fc\u30bf48B\uff09<\/li>\n<li><strong>\u30bb\u30eb\u5358\u4f4d\u8ee2\u9001<\/strong>\u306b\u3088\u308a\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u51e6\u7406\u304c\u9ad8\u901f<\/li>\n<li>\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u6027\u304c\u6c42\u3081\u3089\u308c\u308b\u901a\u4fe1\u306b\u9069\u3059\u308b<\/li>\n<li>QoS\uff08Quality of Service\uff09\u3092\u8003\u616e\u3057\u305f\u5e2f\u57df\u5236\u5fa1\u304c\u53ef\u80fd<\/li>\n<\/ul>\n<table border=\"1\" cellpadding=\"5\">\n<tr>\n<th>\u30d5\u30a3\u30fc\u30eb\u30c9<\/th>\n<th>\u30b5\u30a4\u30ba<\/th>\n<th>\u5185\u5bb9<\/th>\n<\/tr>\n<tr>\n<td>\u30d8\u30c3\u30c0<\/td>\n<td>5\u30d0\u30a4\u30c8<\/td>\n<td>\u7d4c\u8def\u8b58\u5225\u3001\u8aa4\u308a\u691c\u51fa\u3001\u5236\u5fa1\u60c5\u5831<\/td>\n<\/tr>\n<tr>\n<td>\u30da\u30a4\u30ed\u30fc\u30c9<\/td>\n<td>48\u30d0\u30a4\u30c8<\/td>\n<td>\u5b9f\u969b\u306e\u30c7\u30fc\u30bf<\/td>\n<\/tr>\n<\/table>\n<p><strong>\u8a66\u9a13\u3067\u306e\u72d9\u3044\u76ee\uff1a<\/strong>\u300c53\u30d0\u30a4\u30c8\u56fa\u5b9a\u9577\u300d\u306e\u6570\u5024\u3001\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e\u53ef\u5909\u9577\u30d5\u30ec\u30fc\u30e0\u3068\u306e\u6bd4\u8f03\u3001\u9ad8\u901f\u30fb\u4f4e\u9045\u5ef6\u3060\u304c\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u5927\u304d\u3044\u3068\u3044\u3046\u70b9\u3002<\/p>\n<p><strong>\u5b9f\u751f\u6d3b\u306e\u4f8b\uff1a<\/strong>1990\u5e74\u4ee3\u5f8c\u534a\u301c2000\u5e74\u4ee3\u521d\u671f\u3001\u65e5\u672c\u306eADSL\u3084\u5149\u56de\u7dda\u306e\u30d0\u30c3\u30af\u30dc\u30fc\u30f3\u306bATM\u304c\u5229\u7528\u3055\u308c\u3066\u3044\u305f\u3002\u73fe\u5728\u306fIP\u3084\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306b\u7f6e\u304d\u63db\u3048\u3089\u308c\u305f\u304c\u3001\u8a66\u9a13\u3067\u306f\u4f9d\u7136\u91cd\u8981\u3002<\/p>\n<h2>\u307e\u3068\u3081\u2502\u8a66\u9a13\u3068\u5b9f\u52d9\u306b\u5f79\u7acb\u3064\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u77e5\u8b58\u306e\u6574\u7406<\/h2>\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u3092\u4e2d\u5fc3\u3068\u3057\u305fLAN\u6280\u8853\u3068\u305d\u306e\u5468\u8fba\u898f\u683c\u306b\u3064\u3044\u3066\u3001\u57fa\u790e\u304b\u3089\u6b74\u53f2\u7684\u80cc\u666f\u307e\u3067\u5e45\u5e83\u304f\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002\u6700\u5f8c\u306b\u3001\u8a66\u9a13\u3068\u5b9f\u52d9\u3067\u62bc\u3055\u3048\u3066\u304a\u304f\u3079\u304d\u30dd\u30a4\u30f3\u30c8\u3092\u6574\u7406\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u306e\u9032\u5316\uff1a<\/strong>10Mbps \u2192 100Mbps \u2192 1Gbps \u2192 10Gbps\u2026\u3068\u901f\u5ea6\u5411\u4e0a\u3057\u3064\u3064\u5f8c\u65b9\u4e92\u63db\u6027\u3092\u7dad\u6301<\/li>\n<li><strong>\u30d5\u30ec\u30fc\u30e0\u69cb\u6210\uff1a<\/strong>\u30d7\u30ec\u30a2\u30f3\u30d6\u30eb\u301cFCS\u307e\u3067\u306e\u5404\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5f79\u5272\u3092\u7406\u89e3<\/li>\n<li><strong>PoE\uff1a<\/strong>LAN\u30b1\u30fc\u30d6\u30eb\u3067\u96fb\u6e90\u4f9b\u7d66\u3001IEEE 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