{"id":407,"date":"2025-03-15T18:13:00","date_gmt":"2025-03-15T09:13:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=407"},"modified":"2025-10-11T17:28:16","modified_gmt":"2025-10-11T08:28:16","slug":"wi-fi%ef%bc%88%e5%8b%95%e4%bd%9c%e3%81%a8%e4%bb%95%e7%b5%84%e3%81%bf%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=407","title":{"rendered":"Wi-Fi\uff08\u52d5\u4f5c\u3068\u4ed5\u7d44\u307f\uff09"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u7121\u7ddaLAN\u306b\u304a\u3051\u308bCSMA\/CA\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u7ddaLAN\u306e\u901a\u4fe1\u898f\u683c\u3067\u3042\u308bIEEE802.11a\/b\/g\u3067\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">CSMA\/CA\uff08Carrier Sense Multiple Access with Collision Avoidance\uff09<\/span><\/strong> \u3068\u3044\u3046\u901a\u4fe1\u624b\u9806\u304c\u63a1\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u300c\u901a\u4fe1\u958b\u59cb\u524d\u306b\u30c1\u30e3\u30cd\u30eb\u304c\u7a7a\u3044\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u3001\u3055\u3089\u306b\u30e9\u30f3\u30c0\u30e0\u306a\u5f85\u3061\u6642\u9593\u3092\u304a\u3044\u3066\u304b\u3089\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u885d\u7a81\u3092\u907f\u3051\u308b\u4ed5\u7d44\u307f\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305a\u3001CSMA\u3068\u306f\u300cCarrier Sense\uff08\u30ad\u30e3\u30ea\u30a2\u691c\u51fa\uff09\u300d\u300cMultiple Access\uff08\u591a\u91cd\u30a2\u30af\u30bb\u30b9\uff09\u300d\u3092\u610f\u5473\u3057\u3001\u8907\u6570\u306e\u7aef\u672b\u304c\u540c\u3058\u4f1d\u9001\u5a92\u4f53\u3092\u5171\u6709\u3059\u308b\u969b\u306b\u3001\u901a\u4fe1\u53ef\u80fd\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u9001\u4fe1\u3092\u958b\u59cb\u3059\u308b\u65b9\u5f0f\u3067\u3059\u3002\u6709\u7ddaLAN\u306eCSMA\/CD\uff08\u885d\u7a81\u691c\u51fa\u65b9\u5f0f\uff09\u3068\u8003\u3048\u65b9\u306f\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001\u7121\u7ddaLAN\u3067\u306f\u30d5\u30ec\u30fc\u30e0\u885d\u7a81\u3092\u691c\u51fa\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u885d\u7a81\u56de\u907f\uff08Collision Avoidance\uff09\u3068\u3044\u3046\u4ed5\u7d44\u307f\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u7ddaLAN\u3067\u306f\u30d5\u30ec\u30fc\u30e0\u9001\u4fe1\u306e\u969b\u306b\u4ee5\u4e0b\u306e\u624b\u9806\u304c\u52a0\u308f\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c1\u30e3\u30cd\u30eb\u304c\u7a7a\u3044\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b\uff08\u30ad\u30e3\u30ea\u30a2\u30bb\u30f3\u30b9\uff09<\/li>\n\n\n\n<li>\u7a7a\u3044\u3066\u3044\u308b\u3068\u5224\u65ad\u3057\u3066\u3082\u3001\u3059\u3050\u306b\u306f\u9001\u4fe1\u305b\u305aDIFS\u3068\u547c\u3070\u308c\u308b\u4e00\u5b9a\u6642\u9593\u3092\u5f85\u3064<\/li>\n\n\n\n<li>\u3055\u3089\u306b\u30e9\u30f3\u30c0\u30e0\u306a\u5f85\u3061\u6642\u9593\uff08\u30d0\u30c3\u30af\u30aa\u30d5\uff09\u3092\u7d4c\u3066\u9001\u4fe1\u3092\u958b\u59cb<\/li>\n\n\n\n<li>\u53d7\u4fe1\u5074\u306f\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u3063\u305f\u3089SIFS\u5f8c\u306bAck\u3092\u8fd4\u3059<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306eAck\u306e\u3084\u308a\u53d6\u308a\u306b\u3088\u3063\u3066\u30c7\u30fc\u30bf\u306e\u4fe1\u983c\u6027\u3092\u9ad8\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CSMA\/CA\u3067\u7528\u3044\u3089\u308c\u308b\u7528\u8a9e<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d3\u30b8\u30fc\u72b6\u614b<\/strong>\uff1a\u96fb\u6ce2\u304c\u4f7f\u7528\u4e2d\u306e\u72b6\u614b\u3002\u9006\u306b\u7a7a\u3044\u3066\u3044\u308b\u72b6\u614b\u3092\u30a2\u30a4\u30c9\u30eb\u72b6\u614b\u3068\u3044\u3046<\/li>\n\n\n\n<li><strong>\u30d0\u30c3\u30af\u30aa\u30d5<\/strong>\uff1a\u885d\u7a81\u3092\u907f\u3051\u308b\u305f\u3081\u306b\u8a2d\u3051\u3089\u308c\u308b\u30e9\u30f3\u30c0\u30e0\u306a\u5f85\u6a5f\u6642\u9593<\/li>\n\n\n\n<li><strong>DIFS<\/strong>\uff1a\u30c1\u30e3\u30cd\u30eb\u304c\u7a7a\u3044\u305f\u3068\u5224\u65ad\u3059\u308b\u307e\u3067\u306e\u5f85\u6a5f\u6642\u9593<\/li>\n\n\n\n<li><strong>SIFS<\/strong>\uff1a\u6700\u77ed\u306e\u5f85\u6a5f\u6642\u9593\u3002Ack\u30d5\u30ec\u30fc\u30e0\u306a\u3069\u3092\u9001\u308b\u3068\u304d\u306b\u4f7f\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">IEEE802.11a\/b\/g\u306f\u3044\u305a\u308c\u3082\u534a\u4e8c\u91cd\u901a\u4fe1\u3067\u3042\u308a\u3001\u3042\u308b\u77ac\u9593\u306b\u901a\u4fe1\u3067\u304d\u308b\u306e\u306f1\u53f0\u306e\u7aef\u672b\u3060\u3051\u3067\u3059\u3002\u8907\u6570\u306e\u7aef\u672b\u304c\u540c\u6642\u306b\u63a5\u7d9a\u3057\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u3066\u3082\u3001\u5b9f\u969b\u306b\u306f\u9806\u756a\u306b\u9001\u53d7\u4fe1\u304c\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u7aef\u672b\u6570\u304c\u5897\u3048\u308b\u3068\u5f85\u3061\u6642\u9593\u304c\u767a\u751f\u3057\u3001\u5b9f\u52b9\u901f\u5ea6\u306f\u4f4e\u4e0b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CSMA\/CA with RTS\/CTS<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u7ddaLAN\u7279\u6709\u306e\u554f\u984c\u3068\u3057\u3066\u300c\u96a0\u308c\u7aef\u672b\u554f\u984c\u300d\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u3042\u308b\u7aef\u672b\u540c\u58eb\u304c\u4e92\u3044\u306b\u5b58\u5728\u3092\u611f\u77e5\u3067\u304d\u305a\u306b\u540c\u6642\u306b\u901a\u4fe1\u3092\u59cb\u3081\u3066\u3057\u307e\u3044\u3001\u7d50\u679c\u3068\u3057\u3066\u30d5\u30ec\u30fc\u30e0\u304c\u885d\u7a81\u3059\u308b\u73fe\u8c61\u3067\u3059\u3002\u4f8b\u3048\u3070\u906e\u853d\u7269\u3084\u8ddd\u96e2\u306e\u5f71\u97ff\u3067\u4e92\u3044\u306e\u96fb\u6ce2\u304c\u5c4a\u304b\u306a\u3044\u5834\u5408\u306b\u8d77\u3053\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u7528\u3044\u3089\u308c\u308b\u306e\u304c <span class=\"swl-marker mark_yellow\"><strong>CSMA\/CA with RTS\/CTS<\/strong> <\/span>\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>RTS\uff08Request To Send\uff09\uff1a\u9001\u4fe1\u8981\u6c42<\/li>\n\n\n\n<li>CTS\uff08Clear To Send\uff09\uff1a\u9001\u4fe1\u8a31\u53ef<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u9001\u4fe1\u5074\u306f\u307e\u305aRTS\u3092\u9001\u3063\u3066\u9001\u4fe1\u306e\u610f\u601d\u3092\u4f1d\u3048\u3001\u53d7\u4fe1\u5074\u304cCTS\u3092\u8fd4\u3059\u3053\u3068\u3067\u300c\u4eca\u304b\u3089\u9001\u4fe1\u3057\u3066\u3088\u3044\u300d\u3068\u8a31\u53ef\u3092\u4e0e\u3048\u307e\u3059\u3002\u3053\u306e\u3084\u308a\u53d6\u308a\u306b\u3088\u308a\u3001\u5468\u56f2\u306e\u7aef\u672b\u3082\u300c\u901a\u4fe1\u304c\u59cb\u307e\u308b\u300d\u3068\u8a8d\u8b58\u3057\u3001\u885d\u7a81\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3057\u3001RTS\/CTS\u30d5\u30ec\u30fc\u30e0\u306e\u3084\u308a\u53d6\u308a\u304c\u5897\u3048\u308b\u5206\u3001\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u767a\u751f\u3057\u30b9\u30eb\u30fc\u30d7\u30c3\u30c8\u306f\u4f4e\u4e0b\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001AP\u306b\u3088\u3063\u3066\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u7121\u52b9\u5316\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u8fd1\u5e74\u306e\u6a5f\u5668\u3067\u306f\u74b0\u5883\u306b\u5fdc\u3058\u3066RTS\/CTS\u3092\u81ea\u52d5\u7684\u306b\u6709\u52b9\u5316\u3059\u308b\u6a5f\u80fd\u3082\u5099\u308f\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306bRTS\/CTS\u306f\u96a0\u308c\u7aef\u672b\u554f\u984c\u3060\u3051\u3067\u306a\u304f\u3001<strong><span class=\"swl-marker mark_yellow\">IEEE802.11b\u306811g\u304c\u6df7\u5728\u3059\u308b\u74b0\u5883\u3067\u3082\u6709\u52b9<\/span><\/strong>\u3067\u3059\u300211b\u7aef\u672b\u306f11g\u306eOFDM\u4fe1\u53f7\u3092\u7406\u89e3\u3067\u304d\u306a\u3044\u305f\u3081\u300111g\u304c\u901a\u4fe1\u4e2d\u3067\u3082\u6c17\u3065\u304b\u305a\u9001\u4fe1\u3057\u3066\u3057\u307e\u3044\u885d\u7a81\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002RTS\/CTS\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3053\u308c\u3092\u56de\u907f\u3057\u3001\u6df7\u5728\u74b0\u5883\u3067\u3082\u5b89\u5b9a\u3057\u305f\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cCSMA\/CD\u306f\u6709\u7ddaLAN\u3067\u885d\u7a81\u691c\u51fa\u3001CSMA\/CA\u306f\u7121\u7ddaLAN\u3067\u885d\u7a81\u56de\u907f\u300d\u300cRTS\/CTS\u306f\u96a0\u308c\u7aef\u672b\u554f\u984c\u306e\u89e3\u6c7a\u7b56\u300d\u3068\u3044\u3046\u70b9\u3092\u3057\u3063\u304b\u308a\u62bc\u3055\u3048\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CSMA\/CD\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">CSMA\/CD\uff08Carrier Sense Multiple Access with Collision Detection\uff09<\/span><\/strong> \u306f\u3001\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u3067\u63a1\u7528\u3055\u308c\u3066\u3044\u305f\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u65b9\u5f0f\u306e1\u3064\u3067\u3059\u3002\u521d\u671f\u306e\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8LAN\u3001\u7279\u306b10Base5\u308410Base2\u306e\u540c\u8ef8\u30b1\u30fc\u30d6\u30eb\u3092\u4f7f\u3063\u305f\u30d0\u30b9\u578b\u30c8\u30dd\u30ed\u30b8\u30fc\u3084\u3001\u534a\u4e8c\u91cd\u901a\u4fe1\u3057\u304b\u884c\u3048\u306a\u3044\u30cf\u30d6\u3092\u4f7f\u3063\u305f\u30b9\u30bf\u30fc\u578b\u30c8\u30dd\u30ed\u30b8\u30fc\u3067\u5229\u7528\u3055\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\u306e\u666e\u53ca\u3068\u5168\u4e8c\u91cd\u901a\u4fe1\u306e\u4e00\u822c\u5316\u306b\u3088\u308a\u3001CSMA\/CD\u304c\u52d5\u4f5c\u3059\u308b\u6a5f\u4f1a\u306f\u307b\u3068\u3093\u3069\u306a\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002CCNA\u8a66\u9a13\u3067\u306f\u300c\u6b74\u53f2\u7684\u306a\u4ed5\u7d44\u307f\u3068\u3057\u3066\u7406\u89e3\u3057\u3066\u304a\u304f\u3082\u306e\u300d\u3068\u3044\u3046\u4f4d\u7f6e\u3065\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CSMA\/CD\u306e\u52d5\u4f5c<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">CSMA\/CD\u306e\u52d5\u4f5c\u3092\u7c21\u5358\u306b\u6574\u7406\u3059\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7aef\u672b\u306f\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u3059\u308b\u524d\u306b\u3001\u30b1\u30fc\u30d6\u30eb\u304c\u7a7a\u3044\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\uff08Carrier Sense\uff09<\/li>\n\n\n\n<li>\u7a7a\u3044\u3066\u3044\u308c\u3070\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u3059\u308b\uff08Multiple Access\uff09<\/li>\n\n\n\n<li>\u8907\u6570\u306e\u7aef\u672b\u304c\u540c\u6642\u306b\u9001\u4fe1\u3057\u3066\u885d\u7a81\u304c\u8d77\u304d\u308b\u3068\uff08Collision Detection\uff09\u3001\u5168\u7aef\u672b\u304c\u305d\u308c\u3092\u691c\u51fa\u3059\u308b<\/li>\n\n\n\n<li>\u5404\u7aef\u672b\u306f\u30e9\u30f3\u30c0\u30e0\u306a\u6642\u9593\uff08\u30d0\u30c3\u30af\u30aa\u30d5\uff09\u3092\u5f85\u3063\u3066\u304b\u3089\u518d\u9001\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308a\u30011\u672c\u306e\u30b1\u30fc\u30d6\u30eb\u3068\u3044\u3046\u5171\u901a\u306e\u5a92\u4f53\u3092\u8907\u6570\u306e\u7aef\u672b\u3067\u5171\u6709\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u885d\u7a81\u304c\u8d77\u304d\u305f\u5834\u5408\u3001\u30d0\u30c3\u30af\u30aa\u30d5\u306f\u6700\u592715\u56de\u307e\u3067\u7e70\u308a\u8fd4\u3055\u308c\u300116\u56de\u76ee\u306e\u5931\u6557\u3067\u30d5\u30ec\u30fc\u30e0\u306f\u7834\u68c4\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CSMA\/CD\u306e\u7279\u5fb4<\/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\uff08half duplex\uff09<\/span><\/strong> \u306b\u304a\u3044\u3066\u5229\u7528\u3055\u308c\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u30011\u3064\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5a92\u4f53\u4e0a\u3067\u306f\u300c\u3042\u308b\u77ac\u9593\u306b\u901a\u4fe1\u3067\u304d\u308b\u306e\u306f1\u53f0\u306e\u7aef\u672b\u3060\u3051\u300d\u3067\u3059\u3002\u4eba\u304c\u898b\u308b\u3068\u8907\u6570\u306ePC\u304c\u540c\u6642\u306b\u901a\u4fe1\u3057\u3066\u3044\u308b\u3088\u3046\u306b\u611f\u3058\u307e\u3059\u304c\u3001\u5b9f\u969b\u306b\u306f\u975e\u5e38\u306b\u9ad8\u901f\u306b\u9806\u756a\u3067\u9001\u53d7\u4fe1\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u65b9\u3001<strong><span class=\"swl-marker mark_yellow\">\u5168\u4e8c\u91cd\u901a\u4fe1\uff08full duplex\uff09<\/span><\/strong> \u3067\u306f\u9001\u4fe1\u3068\u53d7\u4fe1\u3092\u540c\u6642\u306b\u884c\u3048\u308b\u305f\u3081\u3001CSMA\/CD\u306f\u4e0d\u8981\u3067\u3059\u3002\u73fe\u5728\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u30b9\u30a4\u30c3\u30c1\u3068\u5168\u4e8c\u91cd\u901a\u4fe1\u304c\u57fa\u672c\u306e\u305f\u3081\u3001\u885d\u7a81\u304c\u767a\u751f\u3059\u308b\u74b0\u5883\u81ea\u4f53\u304c\u307b\u307c\u5b58\u5728\u3057\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cCSMA\/CD\u306f\u534a\u4e8c\u91cd\u901a\u4fe1\u3067\u4f7f\u308f\u308c\u308b\u300d\u300c\u5168\u4e8c\u91cd\u901a\u4fe1\u3067\u306f\u4e0d\u8981\u300d\u300c\u73fe\u5728\u306e\u30b9\u30a4\u30c3\u30c1\u74b0\u5883\u3067\u306f\u4f7f\u308f\u308c\u306a\u3044\u300d\u3068\u3044\u3046\u70b9\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IEEE802.11\u30d5\u30ec\u30fc\u30e0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u6982\u8981<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305a\u6bd4\u8f03\u5bfe\u8c61\u3068\u3057\u3066Ethernet\u30d5\u30ec\u30fc\u30e0\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002Ethernet\u30d5\u30ec\u30fc\u30e0\uff08DIX\u898f\u683c\uff09\u306e\u5148\u982d\u306b\u306f\u300c\u30d7\u30ea\u30a2\u30f3\u30d6\u30eb\u300d\u3068\u547c\u3070\u308c\u308b\u30d3\u30c3\u30c8\u5217\u304c\u4ed8\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u30d5\u30ec\u30fc\u30e0\u306e\u958b\u59cb\u3092\u77e5\u3089\u305b\u308b\u305f\u3081\u306e\u540c\u671f\u4fe1\u53f7\u3067\u3059\u304c\u3001\u30d5\u30ec\u30fc\u30e0\u30b5\u30a4\u30ba\u306b\u306f\u542b\u307e\u308c\u306a\u3044\u305f\u3081\u3001Ethernet\u30d5\u30ec\u30fc\u30e0\u306e\u30b5\u30a4\u30ba\u306f64\u301c1518\u30d0\u30a4\u30c8\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u7ddaLAN\u30d5\u30ec\u30fc\u30e0\uff08IEEE802.11\u30d5\u30ec\u30fc\u30e0\uff09\u306f\u3001IEEE802.11a\/b\/g\u306e\u3044\u305a\u308c\u3082\u57fa\u672c\u7684\u306b3\u3064\u306e\u69cb\u6210\u8981\u7d20\u3067\u6210\u308a\u7acb\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PLCP\u30d7\u30ea\u30a2\u30f3\u30d6\u30eb<\/strong>\uff1a\u30d5\u30ec\u30fc\u30e0\u5148\u982d\u306b\u4ed8\u52a0\u3055\u308c\u308b\u540c\u671f\u4fe1\u53f7\uff08\u7269\u7406\u5c64\u3067\u4ed8\u52a0\uff09<\/li>\n\n\n\n<li><strong>PLCP\u30d8\u30c3\u30c0<\/strong>\uff1a\u5909\u8abf\u65b9\u5f0f\u3084\u30c7\u30fc\u30bf\u9577\u306a\u3069\u306e\u60c5\u5831\u3092\u6301\u3064\u30d8\u30c3\u30c0\uff08\u7269\u7406\u5c64\u3067\u4ed8\u52a0\uff09<\/li>\n\n\n\n<li><strong>PSDU<\/strong>\uff1aIEEE802.11\u30d8\u30c3\u30c0\u3068\u5b9f\u30c7\u30fc\u30bf\u3092\u542b\u3080\u90e8\u5206\uff08\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u4ed8\u52a0\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">IEEE802.11b\u306b\u304a\u3051\u308b\u7269\u7406\u30d8\u30c3\u30c0\u306e\u4f8b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">IEEE802.11b\u3067\u306f\u3001PLCP\u30d7\u30ea\u30a2\u30f3\u30d6\u30eb\u306b\u306f2\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30ed\u30f3\u30b0\u30d7\u30ea\u30a2\u30f3\u30d6\u30eb<\/strong>\uff1a18\u30d0\u30a4\u30c8\u3001\u7269\u7406\u30d8\u30c3\u30c0\u306f\u5e38\u306b1Mbps\u3067\u9001\u4fe1\u3055\u308c\u308b<\/li>\n\n\n\n<li><strong>\u30b7\u30e7\u30fc\u30c8\u30d7\u30ea\u30a2\u30f3\u30d6\u30eb<\/strong>\uff1a9\u30d0\u30a4\u30c8\u3001\u7269\u7406\u30d8\u30c3\u30c0\u306f\u5e38\u306b2Mbps\u3067\u9001\u4fe1\u3055\u308c\u308b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u3053\u3067\u91cd\u8981\u306a\u306e\u306f\u3001\u7121\u7ddaLAN\u3067\u306f\u300c\u7269\u7406\u30d8\u30c3\u30c0\u306f\u5e38\u306b\u4f4e\u901f\u3067\u9001\u4fe1\u3055\u308c\u308b\u300d\u3068\u3044\u3046\u898f\u5b9a\u304c\u3042\u308b\u70b9\u3067\u3059\u3002\u53d7\u4fe1\u5074\u306f\u307e\u305a\u3053\u306e\u4f4e\u901f\u306e\u30d8\u30c3\u30c0\u3092\u78ba\u5b9f\u306b\u53d7\u4fe1\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u964d\u306e\u30c7\u30fc\u30bf\u90e8\u5206\uff08MAC\u30d5\u30ec\u30fc\u30e0\uff09\u3092\u6b63\u3057\u3044\u901f\u5ea6\u3067\u53d7\u3051\u53d6\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">IEEE802.11\u30d8\u30c3\u30c0\uff08MAC\u30d8\u30c3\u30c0\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ethernet\u30d5\u30ec\u30fc\u30e0\u3067\u306f\u5b9b\u5148\u30a2\u30c9\u30ec\u30b9\u30fb\u9001\u4fe1\u5143\u30a2\u30c9\u30ec\u30b9\u30fb\u30bf\u30a4\u30d7\u306e3\u9805\u76ee\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u304c\u3001IEEE802.11\u30d5\u30ec\u30fc\u30e0\u306eMAC\u30d8\u30c3\u30c0\u306b\u306f7\u9805\u76ee\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Frame Control<\/strong>\uff1a\u30d5\u30ec\u30fc\u30e0\u306e\u7a2e\u985e\u3084\u9001\u4fe1\u5143\u304c\u7121\u7dda\u304b\u6709\u7dda\u304b\u3001\u6697\u53f7\u5316\u306e\u6709\u7121\u306a\u3069\u3092\u793a\u3059\n<ul class=\"wp-block-list\">\n<li>\u7ba1\u7406\u30d5\u30ec\u30fc\u30e0\uff08\u30d3\u30fc\u30b3\u30f3\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u5236\u5fa1\u30d5\u30ec\u30fc\u30e0\uff08Ack\u3001RTS\/CTS\u306a\u3069\uff09<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Duration\/ID<\/strong>\uff1a\u901a\u4fe1\u306b\u5fc5\u8981\u306a\u6642\u9593\u3092\u6307\u5b9a\u3002RTS\/CTS\u3067\u5229\u7528\u3055\u308c\u308b<\/li>\n\n\n\n<li><strong>Address 1\u301c4<\/strong>\uff1a\u5b9b\u5148MAC\u3001\u9001\u4fe1\u5143MAC\u3001BSSID\uff08AP\u306eMAC\u30a2\u30c9\u30ec\u30b9\uff09\u306a\u3069\u3092\u683c\u7d0d<\/li>\n\n\n\n<li><strong>Sequence Control<\/strong>\uff1a\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\u3084\u30d5\u30e9\u30b0\u30e1\u30f3\u30c8\u756a\u53f7\u3092\u4fdd\u6301<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u306a\u304a\u3001Address\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5185\u5bb9\u306f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u69cb\u6210\u306b\u3088\u308a\u5909\u5316\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070PC\u304cEthernet\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u3057\u3066\u304d\u305f\u5834\u5408\u3001AP\u304c\u5fc5\u8981\u306b\u5fdc\u3058\u3066IEEE802.11\u30d5\u30ec\u30fc\u30e0\u306e\u30a2\u30c9\u30ec\u30b9\u60c5\u5831\u306b\u5909\u63db\u3057\u3001\u7121\u7ddaLAN\u306b\u8ee2\u9001\u3057\u307e\u3059\u3002\u9006\u306b\u7121\u7dda\u304b\u3089\u9001\u3089\u308c\u3066\u304d\u305f\u30d5\u30ec\u30fc\u30e0\u3092\u6709\u7ddaLAN\u3078\u8ee2\u9001\u3059\u308b\u969b\u306f\u3001IEEE802.11\u30d8\u30c3\u30c0\u304b\u3089Ethernet\u30d8\u30c3\u30c0\u306b\u66f8\u304d\u63db\u3048\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30d5\u30ec\u30fc\u30e0\u306e\u7a2e\u985e\u3068\u52d5\u4f5c\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">IEEE802.11\u306e\u30d5\u30ec\u30fc\u30e0\u306b\u306f\u5927\u304d\u304f\u5206\u3051\u30663\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7ba1\u7406\u30d5\u30ec\u30fc\u30e0<\/strong>\uff1aAP\u304c\u9001\u4fe1\u3059\u308b\u30d3\u30fc\u30b3\u30f3\u3001\u30d7\u30ed\u30fc\u30d6\u30ea\u30af\u30a8\u30b9\u30c8\u3001\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u8981\u6c42\u306a\u3069<\/li>\n\n\n\n<li><strong>\u5236\u5fa1\u30d5\u30ec\u30fc\u30e0<\/strong>\uff1aRTS\u3001CTS\u3001Ack\u3001PS-Poll\u306a\u3069<\/li>\n\n\n\n<li><strong>\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0<\/strong>\uff1a\u5b9f\u969b\u306e\u30e6\u30fc\u30b6\u30fc\u30c7\u30fc\u30bf\u3092\u904b\u3076<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306b\u7121\u7ddaLAN\u306e\u30d5\u30ec\u30fc\u30e0\u306fEthernet\u306b\u6bd4\u3079\u3066\u8907\u96d1\u3067\u3042\u308a\u3001\u30a2\u30c9\u30ec\u30b9\u306e\u6570\u3082\u6700\u59274\u3064\u307e\u3067\u6301\u3066\u308b\u70b9\u304c\u7279\u5fb4\u3067\u3059\u3002\u3053\u308c\u306f\u7121\u7ddaLAN\u304c\u300c\u6709\u7dda\u3068\u7121\u7dda\u306e\u6a4b\u6e21\u3057\u300d\u3092\u884c\u3046\u305f\u3081\u3067\u3042\u308a\u3001\u8a66\u9a13\u3067\u306f\u300c\u30a2\u30c9\u30ec\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u610f\u5473\u300d\u300c\u30d5\u30ec\u30fc\u30e0\u306e\u7a2e\u985e\u300d\u304c\u983b\u51fa\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7121\u7ddaLAN\u901a\u4fe1\u306e\u6d41\u308c\uff08\u6982\u8981\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u7ddaLAN\u304c\u3069\u306e\u3088\u3046\u306b\u63a5\u7d9a\u3055\u308c\u901a\u4fe1\u3092\u958b\u59cb\u3059\u308b\u304b\u3092\u3001\u6709\u7ddaLAN\u3068\u6bd4\u8f03\u3057\u3066\u6574\u7406\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u6709\u7ddaLAN<\/th><th>\u7121\u7ddaLAN<\/th><\/tr><\/thead><tbody><tr><td>\u7aef\u672b\u3092LAN\u30b1\u30fc\u30d6\u30eb\u3067\u30cf\u30d6\u3078\u63a5\u7d9a<\/td><td>WLAN\u7aef\u672b\u304c\u5468\u6ce2\u6570\u5e2f\u57df\u3092\u81ea\u52d5\u30b9\u30ad\u30e3\u30f3<\/td><\/tr><tr><td>\u30b1\u30fc\u30d6\u30eb\u304c\u6b63\u3057\u304f\u63a5\u7d9a\u3055\u308c\u30ea\u30f3\u30af\u30a2\u30c3\u30d7<\/td><td>WLAN\u7aef\u672b\u3068AP\u304cESSID\u3092\u78ba\u8a8d<\/td><\/tr><tr><td>\u2013<\/td><td>WLAN\u7aef\u672b\u3068AP\u304c\u8a8d\u8a3c\u3092\u5b9f\u65bd<\/td><\/tr><tr><td>\u2013<\/td><td>WLAN\u7aef\u672b\u3068AP\u304c\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u65bd<\/td><\/tr><tr><td>Ethernet\u30d5\u30ec\u30fc\u30e0\u3092\u30b1\u30fc\u30d6\u30eb\u3067\u4f1d\u9001<\/td><td>\u6697\u53f7\u5316\u3055\u308c\u305fIEEE802.11\u30d5\u30ec\u30fc\u30e0\u3092\u96fb\u6ce2\u3067\u4f1d\u9001<\/td><\/tr><tr><td>MAC\u30a2\u30c9\u30ec\u30b9\u306b\u57fa\u3065\u3044\u3066\u305d\u306e\u307e\u307e\u8ee2\u9001<\/td><td>AP\u304cIEEE802.11\u30d5\u30ec\u30fc\u30e0\u3092Ethernet\u30d5\u30ec\u30fc\u30e0\u306b\u5909\u63db\u3057\u3066\u8ee2\u9001<\/td><\/tr><tr><td>\u30b1\u30fc\u30d6\u30eb\u304c\u629c\u3051\u308c\u3070\u518d\u63a5\u7d9a<\/td><td>\u96fb\u6ce2\u304c\u5c4a\u304b\u306a\u304f\u306a\u308c\u3070\u3001\u7bc4\u56f2\u5185\u3078\u79fb\u52d5<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u7ddaLAN\u306f\u7269\u7406\u30b1\u30fc\u30d6\u30eb\u306e\u63a5\u7d9a\u306b\u3088\u3063\u3066\u30ea\u30f3\u30af\u304c\u78ba\u7acb\u3057\u307e\u3059\u304c\u3001\u7121\u7ddaLAN\u306f\u300c\u5468\u6ce2\u6570\u5e2f\u306e\u63a2\u7d22 \u2192 ESSID\u306e\u4e00\u81f4\u78ba\u8a8d \u2192 \u8a8d\u8a3c \u2192 \u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u300d\u3068\u3044\u3046\u30d7\u30ed\u30bb\u30b9\u3092\u7d4c\u3066\u304b\u3089\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7121\u7ddaLAN\u901a\u4fe1\u306e\u6d41\u308c\uff08\u8a73\u7d30\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u7ddaLAN\u901a\u4fe1\u3067\u4f7f\u308f\u308c\u308bIEEE802.11\u30d5\u30ec\u30fc\u30e0\u306b\u306f <strong>\u7ba1\u7406\u30d5\u30ec\u30fc\u30e0\u30fb\u5236\u5fa1\u30d5\u30ec\u30fc\u30e0\u30fb\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0<\/strong> \u306e3\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3046\u3061\u63a5\u7d9a\u78ba\u7acb\u306e\u624b\u9806\u3067\u4e3b\u306b\u4f7f\u308f\u308c\u308b\u306e\u304c\u7ba1\u7406\u30d5\u30ec\u30fc\u30e0\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5468\u6ce2\u6570\u5e2f\u57df\u306e\u30b9\u30ad\u30e3\u30f3<\/strong><br>AP\u306f\u7d04100\u30df\u30ea\u79d2\u3054\u3068\u306b\u30d3\u30fc\u30b3\u30f3\u30d5\u30ec\u30fc\u30e0\u3092\u9001\u4fe1\u3057\u3066\u304a\u308a\u3001WLAN\u7aef\u672b\u306f\u3053\u308c\u3092\u53d7\u4fe1\u3057\u3066\u5229\u7528\u53ef\u80fd\u306a\u30c1\u30e3\u30cd\u30eb\u3084ESSID\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002\u3082\u3057\u4e00\u5b9a\u6642\u9593\u30d3\u30fc\u30b3\u30f3\u304c\u5f97\u3089\u308c\u306a\u3051\u308c\u3070\u3001\u7aef\u672b\u306f\u30d7\u30ed\u30fc\u30d6\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u308a\u3001AP\u304b\u3089\u306e\u5fdc\u7b54\u3067\u60c5\u5831\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>ESSID\u306e\u4e00\u81f4\u78ba\u8a8d<\/strong><br>\u8907\u6570\u306eAP\u304c\u3042\u308b\u5834\u5408\u3001\u7aef\u672b\u306f\u5168\u30c1\u30e3\u30cd\u30eb\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3001\u6700\u3082\u4fe1\u53f7\u306e\u5f37\u3044AP\u3068\u306e\u63a5\u7d9a\u3092\u8a66\u307f\u307e\u3059\u3002\u901a\u4fe1\u4e2d\u3067\u3082\u3088\u308a\u5f37\u3044\u4fe1\u53f7\u306eAP\u304c\u898b\u3064\u304b\u308b\u3068\u518d\u63a5\u7d9a\u3092\u8a66\u307f\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u3053\u306e\u6319\u52d5\u304c\u591a\u767a\u3059\u308b\u3068\u901a\u4fe1\u304c\u4e0d\u5b89\u5b9a\u306b\u306a\u308b\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u8a8d\u8a3c<\/strong><br>WLAN\u7aef\u672b\u3068AP\u304c\u4e92\u3044\u306b\u8a8d\u8a3c\u30d5\u30ec\u30fc\u30e0\u3092\u4ea4\u63db\u3057\u307e\u3059\u3002IEEE802.11\u898f\u683c\u3068\u3057\u3066\u306f\u300c\u30aa\u30fc\u30d7\u30f3\u30b7\u30b9\u30c6\u30e0\u8a8d\u8a3c\u300d\u3068\u300c\u30b7\u30a7\u30a2\u30fc\u30c9\u30ad\u30fc\u8a8d\u8a3c\u300d\u306e2\u7a2e\u985e\u304c\u3042\u308a\u307e\u3059\uff08\u305f\u3060\u305711i\u306a\u3069\u306e\u9ad8\u5ea6\u306a\u8a8d\u8a3c\u65b9\u5f0f\u306b\u306f\u5f53\u3066\u306f\u307e\u308a\u307e\u305b\u3093\uff09\u3002<\/li>\n\n\n\n<li><strong>\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3<\/strong><br>\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u4ea4\u63db\u3057\u3066\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u7aef\u672b\u306fAP\u306e\u7ba1\u7406\u4e0b\u306b\u5165\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u6697\u53f7\u5316\u901a\u4fe1<\/strong><br>WEP\u3001TKIP\u3001CCMP\u306a\u3069\u306e\u6697\u53f7\u65b9\u5f0f\u3092\u7528\u3044\u3066\u3001IEEE802.11\u30d5\u30ec\u30fc\u30e0\u304c\u6697\u53f7\u5316\u3055\u308c\u96fb\u6ce2\u3067\u4f1d\u9001\u3055\u308c\u307e\u3059\u3002<\/li>\n\n\n\n<li><strong>\u30d5\u30ec\u30fc\u30e0\u5909\u63db<\/strong><br>AP\u306f\u53d7\u4fe1\u3057\u305fIEEE802.11\u30d5\u30ec\u30fc\u30e0\u3092Ethernet\u30d5\u30ec\u30fc\u30e0\u306b\u5909\u63db\u3057\u3001\u6709\u7ddaLAN\u5074\u306b\u8ee2\u9001\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u3088\u3046\u3084\u304f\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306e\u901a\u4fe1\u304c\u884c\u308f\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30ad\u30e3\u30f3\u306e\u7a2e\u985e<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u7ddaLAN\u306e\u63a5\u7d9a\u958b\u59cb\u6642\u306b\u306f2\u3064\u306e\u30b9\u30ad\u30e3\u30f3\u65b9\u5f0f\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u30d1\u30c3\u30b7\u30d6\u30b9\u30ad\u30e3\u30f3<\/strong>\uff1a\u7aef\u672b\u304cAP\u304b\u3089\u306e\u30d3\u30fc\u30b3\u30f3\u3092\u53d7\u4fe1\u3057\u3066ESSID\u3092\u78ba\u8a8d\u3001\u305d\u306e\u5f8c\u8a8d\u8a3c\u306b\u9032\u3080<\/li>\n\n\n\n<li><strong>\u30a2\u30af\u30c6\u30a3\u30d6\u30b9\u30ad\u30e3\u30f3<\/strong>\uff1a\u30d3\u30fc\u30b3\u30f3\u304c\u5f97\u3089\u308c\u306a\u3044\u5834\u5408\u3001\u7aef\u672b\u304c\u30d7\u30ed\u30fc\u30d6\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3001AP\u306e\u30d7\u30ed\u30fc\u30d6\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u53d7\u3051\u3066\u8a8d\u8a3c\u306b\u9032\u3080<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3069\u3061\u3089\u306e\u65b9\u5f0f\u3067\u3082\u3001\u305d\u306e\u5f8c\u306e\u300c\u8a8d\u8a3c \u2192 \u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3 \u2192 \u30c7\u30fc\u30bf\u901a\u4fe1\u300d\u3068\u3044\u3046\u6d41\u308c\u306f\u5171\u901a\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u7121\u7ddaLAN\u63a5\u7d9a\u306e\u57fa\u672c\u7684\u306a\u6d41\u308c\u306f\u300c\u30c1\u30e3\u30cd\u30eb\u3068ESSID\u78ba\u8a8d \u2192 \u8a8d\u8a3c \u2192 \u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3 \u2192 \u30c7\u30fc\u30bf\u901a\u4fe1\u300d\u3067\u3059\u3002\u5404\u30d5\u30a7\u30fc\u30ba\u3067\u4f7f\u308f\u308c\u308b\u7ba1\u7406\u30d5\u30ec\u30fc\u30e0\uff08\u30d3\u30fc\u30b3\u30f3\u3001\u30d7\u30ed\u30fc\u30d6\u30ea\u30af\u30a8\u30b9\u30c8\/\u30ec\u30b9\u30dd\u30f3\u30b9\u3001\u8a8d\u8a3c\u3001\u30a2\u30bd\u30b7\u30a8\u30fc\u30b7\u30e7\u30f3\u306a\u3069\uff09\u306e\u5f79\u5272\u3092\u6574\u7406\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IEEE802.11e\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"swl-marker mark_yellow\"><strong>IEEE802.11e<\/strong> <\/span>\u306f\u3001\u7121\u7ddaLAN\u3067QoS\uff08Quality of Service\uff09\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b2005\u5e74\u306b\u7b56\u5b9a\u3055\u308c\u305f\u898f\u683c\u3067\u3059\u3002\u7279\u306b\u97f3\u58f0\u901a\u8a71\u3084\u52d5\u753b\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u306e\u3088\u3046\u306b\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u6027\u304c\u6c42\u3081\u3089\u308c\u308b\u901a\u4fe1\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IEEE802.11e\u3067\u898f\u5b9a\u3055\u308c\u3066\u3044\u308b\u65b9\u5f0f\u306f2\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>EDCA\uff08Enhanced Distributed Channel Access\uff09<\/strong>\uff1a\u512a\u5148\u5ea6\u306e\u9ad8\u3044\u30d5\u30ec\u30fc\u30e0\u3092\u512a\u5148\u7684\u306b\u9001\u4fe1\u3059\u308b\u65b9\u5f0f<\/li>\n\n\n\n<li><strong>HCCA\uff08Hybrid coordination function Controlled Channel Access\uff09<\/strong>\uff1a\u512a\u5148\u5ea6\u306e\u9ad8\u3044\u30d5\u30ec\u30fc\u30e0\u306b\u5c02\u7528\u306e\u5e2f\u57df\u3092\u5272\u308a\u5f53\u3066\u308b\u65b9\u5f0f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u73fe\u72b6\u3067\u306fEDCA\u304c\u4e3b\u6d41\u3067\u3042\u308a\u3001IEEE802.11e\u3068\u3044\u3048\u3070EDCA\u3092\u6307\u3059\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IEEE802.11e &#8211; EDCA<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">EDCA\u3067\u306f\u9001\u4fe1\u3059\u308b\u30d1\u30b1\u30c3\u30c8\u30924\u3064\u306e\u30a2\u30af\u30bb\u30b9\u30ab\u30c6\u30b4\u30ea\uff08AC\uff09\u306b\u5206\u985e\u3057\u3001\u305d\u308c\u305e\u308c\u306e\u9001\u4fe1\u30ad\u30e5\u30fc\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001\u512a\u5148\u5ea6\u306b\u57fa\u3065\u3044\u3066\u9001\u4fe1\u306e\u9806\u756a\u304c\u6c7a\u3081\u3089\u308c\u307e\u3059\u3002\u512a\u5148\u5ea6\u306e\u9ad8\u3044\u3082\u306e\u304b\u3089\u9806\u306b\u51e6\u7406\u3055\u308c\u308b\u305f\u3081\u3001\u97f3\u58f0\u3084\u52d5\u753b\u304c\u9045\u5ef6\u306a\u304f\u51e6\u7406\u3055\u308c\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5206\u985e\u3055\u308c\u308b\u30a2\u30af\u30bb\u30b9\u30ab\u30c6\u30b4\u30ea\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u512a\u5148\u5ea6<\/th><th>AC<\/th><th>\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u7a2e\u985e<\/th><\/tr><\/thead><tbody><tr><td>1<\/td><td>AC_VO<\/td><td>\u97f3\u58f0\uff08Voice\uff09<\/td><\/tr><tr><td>2<\/td><td>AC_VI<\/td><td>\u6620\u50cf\uff08Video\uff09<\/td><\/tr><tr><td>3<\/td><td>AC_BE<\/td><td>\u30d9\u30b9\u30c8\u30a8\u30d5\u30a9\u30fc\u30c8\uff08\u901a\u5e38\u306e\u30c7\u30fc\u30bf\uff09<\/td><\/tr><tr><td>4<\/td><td>AC_BK<\/td><td>\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\uff08\u4f4e\u512a\u5148\u5ea6\u306e\u51e6\u7406\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">EDCA\u306e\u52d5\u4f5c\u306f\u6b21\u306e4\u3064\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u3088\u3063\u3066\u8abf\u6574\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CWmin \/ CWmax<\/strong>\uff1a\u9001\u4fe1\u5f85\u3061\u6642\u9593\uff08\u30b3\u30f3\u30c6\u30f3\u30b7\u30e7\u30f3\u30a6\u30a3\u30f3\u30c9\u30a6\uff09\u306e\u6700\u5c0f\u5024\uff0f\u6700\u5927\u5024\u3002\u5024\u304c\u5c0f\u3055\u3044\u307b\u3069\u512a\u5148\u5ea6\u304c\u9ad8\u3044\u3002<\/li>\n\n\n\n<li><strong>AIFS<\/strong>\uff1a\u30d5\u30ec\u30fc\u30e0\u9001\u4fe1\u9593\u9694\u3002\u77ed\u3044\u307b\u3069\u512a\u5148\u5ea6\u304c\u9ad8\u3044\u3002<\/li>\n\n\n\n<li><strong>TXOP Limit<\/strong>\uff1a\u9001\u4fe1\u6a29\u3092\u5f97\u3066\u304b\u3089\u30c1\u30e3\u30cd\u30eb\u3092\u5360\u6709\u3067\u304d\u308b\u6642\u9593\u3002\u4e00\u5ea6\u306b\u9001\u308c\u308b\u30d5\u30ec\u30fc\u30e0\u6570\u3092\u6c7a\u3081\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u97f3\u58f0\u7528\u306eAC_VO\u306f\u5f85\u3061\u6642\u9593\u3092\u77ed\u304f\u8a2d\u5b9a\u3057\u3001\u3067\u304d\u308b\u3060\u3051\u65e9\u304f\u9001\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u8abf\u6574\u3055\u308c\u307e\u3059\u3002\u4e00\u65b9\u3001\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u901a\u4fe1\u306f\u9001\u4fe1\u6a5f\u4f1a\u304c\u5c11\u306a\u304f\u3066\u3082\u554f\u984c\u306a\u3044\u305f\u3081\u3001\u5f85\u3061\u6642\u9593\u306f\u9577\u3081\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EDCA\u3092\u5229\u7528\u3059\u308b\u306b\u306f\u3001\u30a2\u30af\u30bb\u30b9\u30dd\u30a4\u30f3\u30c8\u3060\u3051\u3067\u306a\u304f\u7aef\u672b\u5074\u306e\u7121\u7ddaLAN\u30a2\u30c0\u30d7\u30bf\u3082EDCA\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u6709\u7ddaLAN\u5074\u306eQoS\u8a2d\u5b9a\u3068\u306e\u6574\u5408\u6027\u3082\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">IEEE802.11e &#8211; HCCA<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">HCCA\u306fAP\u304c\u4e2d\u5fc3\u3068\u306a\u308a\u3001\u5404\u7aef\u672b\u306b\u9001\u4fe1\u306e\u8a31\u53ef\u3092\u4e0e\u3048\u308b\u3053\u3068\u3067QoS\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002AP\u306f <strong><span class=\"swl-marker mark_yellow\">QoS CF-Poll<\/span><\/strong> \u3068\u3044\u3046\u5236\u5fa1\u30d5\u30ec\u30fc\u30e0\u3092\u7aef\u672b\u306b\u9001\u4fe1\u3057\u3001\u305d\u3053\u306b\u8a18\u8f09\u3055\u308c\u305f\u6642\u9593\uff08TXOP\uff09\u306e\u9593\u3060\u3051\u901a\u4fe1\u3092\u8a31\u53ef\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u65b9\u5f0f\u3067\u306fAP\u304c\u9001\u4fe1\u6a29\u3092\u4e00\u5143\u7684\u306b\u7ba1\u7406\u3059\u308b\u305f\u3081\u3001\u885d\u7a81\u304c\u767a\u751f\u305b\u305a\u3001\u3088\u308a\u53b3\u5bc6\u306aQoS\u5236\u5fa1\u304c\u53ef\u80fd\u3067\u3059\u3002\u305f\u3060\u3057\u3001AP\u3068\u7aef\u672b\u306e\u53cc\u65b9\u304cHCCA\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3051\u308c\u3070\u306a\u3089\u305a\u3001\u5b9f\u88c5\u306e\u96e3\u3057\u3055\u3084\u5bfe\u5fdc\u6a5f\u5668\u306e\u5c11\u306a\u3055\u304b\u3089\u3001\u5b9f\u969b\u306e\u5c0e\u5165\u4f8b\u306f\u307b\u3068\u3093\u3069\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">QoS\u5c0e\u5165\u306e\u524d\u306b\u8003\u616e\u3059\u3079\u304d\u8a2d\u8a08<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7121\u7ddaLAN\u306b\u304a\u3051\u308bQoS\u3092\u8003\u3048\u308b\u969b\u3001\u307e\u305a\u57fa\u672c\u3068\u306a\u308b\u8a2d\u8a08\u3067\u91cd\u8981\u306a\u306e\u306f\u300c\u5468\u6ce2\u6570\u306e\u5206\u96e2\u300d\u3067\u3059\u3002\u4f8b\u3048\u3070\u7121\u7ddaLAN\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u3068\u7121\u7ddaIP\u96fb\u8a71\u304c\u540c\u3058AP\u3092\u4f7f\u3063\u3066\u540c\u30582.4GHz\u5e2f\uff08802.11b\/g\uff09\u3067\u901a\u4fe1\u3057\u3066\u3044\u308b\u3068\u3001\u97f3\u58f0\u304c\u52a3\u5316\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u5834\u5408\u3001PC\u306e\u30c7\u30fc\u30bf\u901a\u4fe1\u30925GHz\u5e2f\uff08802.11a\uff09\u3001\u7121\u7ddaIP\u96fb\u8a71\u30922.4GHz\u5e2f\u306b\u5206\u3051\u308b\u3060\u3051\u3067\u54c1\u8cea\u304c\u6539\u5584\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3057\u304b\u3057\u3001PC\u3068\u96fb\u8a71\u306e\u4e21\u65b9\u304c2.4GHz\u3057\u304b\u4f7f\u3048\u306a\u3044\u5834\u5408\u3084\u3001\u512a\u5148\u5ea6\u3092\u3055\u3089\u306b\u5236\u5fa1\u3057\u305f\u3044\u5834\u5408\u306bIEEE802.11e\u3092\u5c0e\u5165\u3057\u307e\u3059\u3002EDCA\u306b\u3088\u308b\u512a\u5148\u5236\u5fa1\u3092\u9069\u5207\u306b\u884c\u3048\u3070\u3001\u5fc5\u8981\u306a\u54c1\u8cea\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cisco\u306e\u63a8\u5968\u5024\u3068\u3057\u3066\u306f\u30011\u3064\u306eAP\u3067\u540c\u6642\u306b\u63a5\u7d9a\u3059\u308b\u7121\u7ddaIP\u96fb\u8a71\u306f10\u301c15\u53f0\u7a0b\u5ea6\u306b\u5236\u9650\u3059\u308b\u306e\u304c\u59a5\u5f53\u3068\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u7121\u7dda\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u306b\u3064\u3044\u3066\u3082\u540c\u7a0b\u5ea6\u306e\u53f0\u6570\u304c\u76ee\u5b89\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u969b\u306e\u8a2d\u8a08\u3067\u306f\u3001<strong>SSID\u3054\u3068\u306e\u6700\u5927\u63a5\u7d9a\u6570\u306e\u5236\u9650<\/strong> \u3084 <strong>\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b9\u6a5f\u80fd<\/strong> \u3092\u6d3b\u7528\u3057\u3066AP\u306e\u8ca0\u8377\u3092\u5206\u6563\u3055\u305b\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u97f3\u58f0\u901a\u8a71\u7528SSID\u3067\u306f\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b9\u3092\u6709\u52b9\u5316\u3059\u308b\u3068\u30ed\u30fc\u30df\u30f3\u30b0\u9045\u5ef6\u304c\u767a\u751f\u3059\u308b\u305f\u3081\u7121\u52b9\u5316\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"is-style-icon_pen wp-block-paragraph\">\u8a66\u9a13\u5bfe\u7b56\uff1a\u300cIEEE802.11e\u306fQoS\u898f\u683c\u300d\u300cEDCA\uff1d\u512a\u5148\u5ea6\u5236\u5fa1\u3001HCCA\uff1dAP\u4e3b\u5c0e\u3067\u5e2f\u57df\u7ba1\u7406\u300d\u300cQoS\u3092\u8003\u3048\u308b\u524d\u306b\u5468\u6ce2\u6570\u5206\u96e2\u304c\u91cd\u8981\u300d\u3068\u3044\u3046\u30dd\u30a4\u30f3\u30c8\u3092\u62bc\u3055\u3048\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\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\/03\/Wi-Fi\uff08\u52d5\u4f5c\u3068\u4ed5\u7d44\u307f\uff09.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Wi-Fi\uff08\u52d5\u4f5c\u3068\u4ed5\u7d44\u307f\uff09\u306e\u57cb\u3081\u8fbc\u307f\u3002\"><\/object><a id=\"wp-block-file--media-13d0c386-1aa7-45a8-9b66-4158175bc88e\" href=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/03\/Wi-Fi\uff08\u52d5\u4f5c\u3068\u4ed5\u7d44\u307f\uff09.pdf\">Wi-Fi\uff08\u52d5\u4f5c\u3068\u4ed5\u7d44\u307f\uff09<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u7121\u7ddaLAN\u306b\u304a\u3051\u308bCSMA\/CA\u3068\u306f \u7121\u7ddaLAN\u306e\u901a\u4fe1\u898f\u683c\u3067\u3042\u308bIEEE802.11a\/b\/g\u3067\u306f\u3001CSMA\/CA\uff08Carrier Sense Multiple Access with Collision Avoidan [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[12],"tags":[],"class_list":["post-407","post","type-post","status-publish","format-standard","hentry","category-network-access"],"_links":{"self":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=407"}],"version-history":[{"count":3,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/407\/revisions"}],"predecessor-version":[{"id":664,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/407\/revisions\/664"}],"wp:attachment":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}