{"id":1901,"date":"2020-03-25T19:18:00","date_gmt":"2020-03-25T10:18:00","guid":{"rendered":"https:\/\/www.seraku.co.jp\/tectec-note\/?p=1901"},"modified":"2024-01-15T09:46:09","modified_gmt":"2024-01-15T00:46:09","slug":"data-link-layer","status":"publish","type":"post","link":"https:\/\/www.seraku.co.jp\/tectec-note\/industry\/data-link-layer\/","title":{"rendered":"\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3068\u306f\uff1fOSI\u53c2\u7167\u30e2\u30c7\u30eb\u3092\u56f3\u89e3\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n<p><strong>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3067\u306f\u3001\u968e\u5c64\u304c7\u968e\u5c64\u306b\u7d30\u5206\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/strong>\u305d\u306e7\u968e\u5c64\u306e\u4e2d\u3067\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u306e\u5f79\u5272\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3068\u306f<\/h2>\n\n\n\n<p><strong>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u306f\u901a\u4fe1\u56de\u7dda\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002<\/strong>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u306f\u3001OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306e\u30ec\u30a4\u30e42\uff08L2\uff09\u306e\u898f\u683c\u3067\u3042\u308a\u3001\u96a3\u63a5\u3059\u308b\u30ce\u30fc\u30c9\uff08\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u69cb\u6210\u3059\u308b\u6a5f\u5668\uff09\u3068\u6b63\u78ba\u306b\u901a\u4fe1\u3092\u3059\u308b\u305f\u3081\u306e\u30eb\u30fc\u30eb\u304c\u6c7a\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<strong>\u901a\u4fe1\u304c\u59cb\u307e\u3063\u3066\u6700\u521d\u306e\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u5148\u306f\u30b1\u30fc\u30d6\u30eb\u306a\u3069\u3067\u3064\u306a\u304c\u308b\u30ce\u30fc\u30c9\u3067\u3059<\/strong>\u3002\u4e0d\u7279\u5b9a\u591a\u6570\u306e\u30ce\u30fc\u30c9\u306b\u30c7\u30fc\u30bf\u304c\u5c4a\u3044\u3066\u3057\u307e\u3046\u3053\u3068\u306a\u304f\u3001<strong>\u53d7\u3051\u53d6\u3063\u3066\u6b32\u3057\u3044\u30ce\u30fc\u30c9\u306e\u307f\u304c\u30c7\u30fc\u30bf\u3092\u53d7\u4fe1\u3067\u304d\u308b\u30eb\u30fc\u30eb\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u306f\u3001\u96a3\u63a5\u6a5f\u5668\u3092\u7279\u5b9a\u3059\u308b\u305f\u3081\u306b\u3001MAC\u30a2\u30c9\u30ec\u30b9\u306a\u3069\u306e\u7269\u7406\u30a2\u30c9\u30ec\u30b9\u3092\u5229\u7528\u3057\u3066\u3069\u3053\u304b\u3089\u3069\u3053\u306b\u3001\u4f1d\u9001\u3059\u308b\u30c7\u30fc\u30bf\u306a\u306e\u304b\u3092\u5224\u65ad\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u9001\u4fe1\u4e2d\u306b\u30c7\u30fc\u30bf\u304c\u58ca\u308c\u3066\u3044\u306a\u3044\u304b\u3069\u3046\u304b\u3082\u78ba\u8a8d\u3059\u308b\u30eb\u30fc\u30eb\u304c\u6c7a\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"point\">\n<li class=\"pointtitle\">CHECK \u30dd\u30a4\u30f3\u30c8<\/li>\n<div class=\"pointbg\">\n<li class=\"pointitems\">\u7279\u5b9a\u306eMAC\u30a2\u30c9\u30ec\u30b9\u306b\u306e\u307f\u901a\u4fe1\u3059\u308b\u305f\u3081\u306e\u30eb\u30fc\u30eb\u3092\u6c7a\u3081\u3066\u3044\u308b\u3002<\/li>\n<li class=\"pointitems\">\u901a\u4fe1\u4e2d\u306e\u30c7\u30fc\u30bf\u304c\u58ca\u308c\u3066\u3044\u306a\u3044\u304b\u306e\u30c1\u30a7\u30c3\u30af\u304c\u53ef\u80fd\u3002<\/li>\n<\/div>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>MAC\u30a2\u30c9\u30ec\u30b9\u3068\u306f<\/strong><\/h3>\n\n\n\n<p><strong>Medium Access Control\u306e\u7565\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30fc\u30ea\u30f3\u30af\u5c64\u306f\u76ee\u7684\u306e\u30ce\u30fc\u30c9\u306b\u306e\u307f\u30c7\u30fc\u30bf\u3092\u5c4a\u3051\u308b\u5f79\u5272\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u7279\u5b9a\u306e\u5b9b\u5148\u306b\u306e\u307f\u9001\u308b\u305f\u3081\u306b\u306f\u5b9b\u5148\u304c\u5fc5\u8981\u3067\u3059\u3002\u305d\u306e\u5b9b\u5148\u3068\u3057\u3066\u4f7f\u308f\u308c\u308b\u306e\u304cMAC\u30a2\u30c9\u30ec\u30b9\u3067\u3059\u3002<\/strong><\/p>\n\n\n\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u3084\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u306e\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u7528\u306e\u30dd\u30fc\u30c8\u3092\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u547c\u3073\u307e\u3059\u3002<strong>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u306f\u56fa\u6709<\/strong>\uff082\u3064\u3068\u3057\u3066\u540c\u3058\u3082\u306e\u304c\u306a\u3044\uff09<strong>\u306eMAC\u30a2\u30c9\u30ec\u30b9\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u3066\u3001\u88fd\u9020\u6642\u306b\u5272\u308a\u632f\u3089\u308c\u305f\u5f8c\u5909\u66f4\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002<\/strong>\u305d\u306e\u305f\u3081<strong>\u78ba\u5b9f\u306b\u76ee\u7684\u3068\u3057\u305f\u5b9b\u5148\u306b\u30c7\u30fc\u30bf\u3092\u5c4a\u3051\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n<p>MAC\u30a2\u30c9\u30ec\u30b9\u306f\u5168\u4f53\u3068\u3057\u306648\u30d3\u30c3\u30c8\u3067\u69cb\u6210\u3055\u308c\u3001<strong>\u4e0a\u4f4d24\u30d3\u30c3\u30c8\u306f\u30d9\u30f3\u30c0\u30fc\u30b3\u30fc\u30c9\u3068\u547c\u3070\u308c\u3066\u304a\u308a\u3001\u5404\u30e1\u30fc\u30ab\u30fc\u306b\u5272\u308a\u632f\u3089\u308c\u305f\u756a\u53f7\u3002\u4e0b\u4f4d24\u30d3\u30c3\u30c8\u306f\u30b7\u30ea\u30a2\u30eb\u756a\u53f7\u3068\u547c\u3070\u308c\u3001\u5404\u30e1\u30fc\u30ab\u30fc\u304c\u91cd\u8907\u3057\u306a\u3044\u3088\u3046\u306b\u3001\u7aef\u672b\u56fa\u6709\u306b\u5272\u308a\u632f\u3063\u305f\u756a\u53f7\u3002\u3068\u3044\u3046\u30eb\u30fc\u30eb\u304c\u3042\u308a\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" loading=\"lazy\" width=\"1200\" height=\"1700\" src=\"https:\/\/www.seraku.co.jp\/tectec-note\/wp-content\/uploads\/datalink-layer_img_01.jpg\" alt=\"\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3068\u306f\" class=\"wp-image-1902\" srcset=\"https:\/\/www.seraku.co.jp\/tectec-note\/wp-content\/uploads\/datalink-layer_img_01.jpg 1200w, https:\/\/www.seraku.co.jp\/tectec-note\/wp-content\/uploads\/datalink-layer_img_01-768x1088.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u306e\u4e3b\u306a\u5f79\u5272<\/h3>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u306f\u3001\u6b21\u306e\u3053\u3068\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5a92\u4f53\u3084\u9001\u4fe1\u76f8\u624b\u306b\u30c7\u30fc\u30bf\u3092\u9001\u308a\u51fa\u3059\u3068\u304d\u306e\u30bf\u30a4\u30df\u30f3\u30b0<\/h4>\n\n\n\n<p>\u540c\u4e00\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u3042\u308b<strong>\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8LAN\u5185\u3067\u7aef\u672b\u304b\u3089\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u969b\u3001\u30c7\u30fc\u30bf\u540c\u58eb\u304c\u885d\u7a81\u3057\u306a\u3044\u3088\u3046\u306b\u3001\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3057\u3066\u9001\u4fe1\u3057\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n<p>\u203b\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u30fb\u30fb\u30fbLAN\u306b\u63a1\u7528\u3055\u308c\u3066\u3044\u308b\u901a\u4fe1\u898f\u683c\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u4f1d\u9001\u4e2d\u306b\u767a\u751f\u3057\u305f\u30a8\u30e9\u30fc\u306e\u691c\u51fa\u3068\u5bfe\u51e6\u65b9\u6cd5<\/h4>\n\n\n\n<p>\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u4e2d\u306b\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u969b\u306f\u30a8\u30e9\u30fc\u306e\u8a8d\u8b58\u3092\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u3069\u306e\u3088\u3046\u306a\u5bfe\u51e6\u3092\u3059\u308b\u304b\u3092\u6c7a\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n<h4 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\uff08\u30d5\u30ec\u30fc\u30e0\uff09\u306e\u69cb\u9020<\/h4>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u306e<strong>PDU\uff08protocol data unit\uff09\u3067\u3042\u308b\u30d5\u30ec\u30fc\u30e0\u306e\u69cb\u9020\u3092\u898f\u683c\u3068\u3057\u3066\u5b9a\u3081\u3066\u3044\u307e\u3059\u3002<\/strong><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u5143\u304a\u3088\u3073\u5b9b\u5148\u306e\u8b58\u5225\u65b9\u6cd5<\/h4>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u306f<strong>MAC\u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u3084\u308a\u53d6\u308a\u3059\u308b\u76f8\u624b\u3092\u8b58\u5225\u3057\u3066\u3044\u307e\u3059\u3002<\/strong>\u3084\u308a\u53d6\u308a\u3059\u308b\u76f8\u624b\u306f\u3082\u3061\u308d\u3093\u3001\u96a3\u308a\u5408\u3046\u6a5f\u5668\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u52d5\u4f5c\u3059\u308b\u4e3b\u306a\u6a5f\u5668<\/h2>\n\n\n\n<p>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u3067\u52d5\u4f5c\u3059\u308b\u6a5f\u5668\u3068\u3057\u3066\u3001<strong>\u30d6\u30ea\u30c3\u30b8\u3068\u30b9\u30a4\u30c3\u30c1\uff08\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6\u3001L2\u30b9\u30a4\u30c3\u30c1\u3068\u3082\u547c\u3070\u308c\u308b\uff09<\/strong>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b9\u30a4\u30c3\u30c1\uff08\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6\u3001L2\u30b9\u30a4\u30c3\u30c1\uff09<\/h3>\n\n\n\n<p>\u30b9\u30a4\u30c3\u30c1\u306f<strong>\u591a\u304f\u306e\u30dd\u30fc\u30c8\u304c\u3042\u308b\u30d6\u30ea\u30c3\u30b8\u3068\u8003\u3048\u3066\u3088\u3044\u3067\u3059\u3002<\/strong>\u30d6\u30ea\u30c3\u30b8\u3068\u306e\u5927\u304d\u306a\u9055\u3044\u306f\u30d5\u30ec\u30fc\u30e0\u306e\u51e6\u7406\u3059\u308b\u969b\u306b\u30d6\u30ea\u30c3\u30b8\u306f\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u51e6\u7406\u3092\u3059\u308b\u306e\u306b\u5bfe\u3057\u3066\u30b9\u30a4\u30c3\u30c1\u306f<strong>\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u3088\u3063\u3066\u51e6\u7406\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/strong>\u6700\u8fd1\u306f\u30b9\u30a4\u30c3\u30c1\u306e\u6a5f\u80fd\u767a\u5c55\u304c\u76ee\u899a\u307e\u3057\u304fL3\u30b9\u30a4\u30c3\u30c1\u3084L4\u30b9\u30a4\u30c3\u30c1\u3001L7\u30b9\u30a4\u30c3\u30c1\u3068\u975e\u5e38\u306b\u591a\u304f\u306e\u6a5f\u80fd\u3092\u3082\u3064\u6a5f\u5668\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" loading=\"lazy\" width=\"1200\" height=\"504\" src=\"https:\/\/www.seraku.co.jp\/tectec-note\/wp-content\/uploads\/datalink-layer_img_02.jpg\" alt=\"\u30b9\u30a4\u30c3\u30c1\uff08\u30b9\u30a4\u30c3\u30c1\u30f3\u30b0\u30cf\u30d6\u3001L2\u30b9\u30a4\u30c3\u30c1\uff09\" class=\"wp-image-1903\" srcset=\"https:\/\/www.seraku.co.jp\/tectec-note\/wp-content\/uploads\/datalink-layer_img_02.jpg 1200w, https:\/\/www.seraku.co.jp\/tectec-note\/wp-content\/uploads\/datalink-layer_img_02-768x323.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" 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