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class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.fenet.jp\/infla\/column\/technology\/osi%e5%8f%82%e7%85%a7%e3%83%a2%e3%83%87%e3%83%ab%e3%81%a8%e3%81%af%ef%bc%9f7%e3%81%a4%e3%81%ae%e9%9a%8e%e5%b1%a4%e3%81%aa%e3%81%a9%e3%81%ae%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98%ef%bd%9ctcp-ip%e3%81%a8\/#%E3%83%95%E3%82%A1%E3%82%A4%E3%82%A2%E3%82%A6%E3%82%A9%E3%83%BC%E3%83%AB\" title=\"\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\">\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.fenet.jp\/infla\/column\/technology\/osi%e5%8f%82%e7%85%a7%e3%83%a2%e3%83%87%e3%83%ab%e3%81%a8%e3%81%af%ef%bc%9f7%e3%81%a4%e3%81%ae%e9%9a%8e%e5%b1%a4%e3%81%aa%e3%81%a9%e3%81%ae%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98%ef%bd%9ctcp-ip%e3%81%a8\/#UTM\/NGFW\" title=\"UTM\/NGFW\">UTM\/NGFW<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.fenet.jp\/infla\/column\/technology\/osi%e5%8f%82%e7%85%a7%e3%83%a2%e3%83%87%e3%83%ab%e3%81%a8%e3%81%af%ef%bc%9f7%e3%81%a4%e3%81%ae%e9%9a%8e%e5%b1%a4%e3%81%aa%e3%81%a9%e3%81%ae%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98%ef%bd%9ctcp-ip%e3%81%a8\/#OSI%E5%8F%82%E7%85%A7%E3%83%A2%E3%83%87%E3%83%AB%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6%E5%AD%A6%E3%81%BC%E3%81%86%EF%BC%81\" title=\"OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306b\u3064\u3044\u3066\u5b66\u307c\u3046\uff01\">OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306b\u3064\u3044\u3066\u5b66\u307c\u3046\uff01<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"OSI%E5%8F%82%E7%85%A7%E3%83%A2%E3%83%87%E3%83%AB%E3%81%A8%E3%81%AF%EF%BC%9F\"><\/span>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3068\u306f\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img src=\"https:\/\/cdn.pixabay.com\/photo\/2015\/11\/03\/08\/56\/question-mark-1019820_1280.jpg\" \/><\/p>\n<p><strong><mark>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3068\u306f\u3001\u56fd\u969b\u6a19\u6e96\u5316\u6a5f\u69cb\uff08ISO\uff09\u304c\u901a\u4fe1\u3092\u884c\u3046\u969b\u306e\u30eb\u30fc\u30eb\u3068\u3057\u3066\u5b9a\u3081\u305f\u3082\u306e\u3067\u3042\u308a\u3001\u3053\u308c\u306b\u3088\u308a\u30eb\u30fc\u30eb\u304c\u7d71\u4e00\u5316\u3055\u308c\u305f\u3053\u3068\u3067\u3001\u7570\u306a\u308b\u30e1\u30fc\u30ab\u30fc\u306e\u88fd\u54c1\u3067\u3082\u3001\u901a\u4fe1\u3092\u53ef\u80fd\u306b\u3057\u307e\u3057\u305f\u3002<\/mark><\/strong>\u56fd\u969b\u6a19\u6e96\u5316\u6a5f\u69cb\u304c\u3001OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3068\u3044\u3046\u30eb\u30fc\u30eb\u3092\u5b9a\u3081\u308b\u307e\u3067\u306f\u3001\u7570\u306a\u308b\u30e1\u30fc\u30ab\u30fc\u306e\u88fd\u54c1\u3067\u3001\u901a\u4fe1\u304c\u51fa\u6765\u306a\u3044\u3068\u3044\u3046\u72b6\u614b\u3067\u3057\u305f\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OSI%E5%8F%82%E7%85%A7%E3%83%A2%E3%83%87%E3%83%AB%E3%81%AE%E5%9F%BA%E7%A4%8E%E7%9F%A5%E8%AD%98\"><\/span>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306e\u57fa\u790e\u77e5\u8b58<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img src=\"https:\/\/cdn.pixabay.com\/photo\/2016\/11\/22\/23\/09\/fountain-pen-1851096_1280.jpg\" \/><\/p>\n<p><strong><mark>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3068\u3088\u304f\u6bd4\u8f03\u3055\u308c\u308b\u3082\u306e\u3067\u3001IP\u30bb\u30c3\u30c8\u30e2\u30c7\u30eb\u3068\u3044\u3046\u30e2\u30c7\u30eb\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/mark><\/strong>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3068\u6bd4\u8f03\u3057\u305f\u5834\u5408\u5927\u304d\u304f\u9055\u3046\u70b9\u306f\u3001IP\u30bb\u30c3\u30c8\u30e2\u30c7\u30eb\u3067\u306f\u3001OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3067\u8a00\u3046\u7b2c5\u5c64\u304b\u3089\u7b2c7\u5c64\u304c1\u3064\u306b\u307e\u3068\u3081\u3089\u308c\u3066\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u3068\u547c\u3070\u308c\u3066\u3044\u308b\u3053\u3068\u3067\u3059\u3002\u73fe\u5728\u306f\u3001OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3088\u308a\u3082IP\u30bb\u30c3\u30c8\u30e2\u30c7\u30eb\u306e\u65b9\u304c\u4e3b\u6d41\u3068\u3057\u3066\u6271\u308f\u308c\u3066\u3044\u307e\u3059\u304c\u3001OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306f\u6982\u5ff5\u3068\u3057\u3066\u5b58\u5728\u3057\u7d9a\u3051\u3001\u4f55\u304b\u3092\u8aac\u660e\u3059\u308b\u5834\u5408\u306bOSI\u53c2\u7167\u30e2\u30c7\u30eb\u304c\u3088\u304f\u7528\u3044\u3089\u308c\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7%E3%81%A4%E3%81%AE%E9%9A%8E%E5%B1%A4\"><\/span>7\u3064\u306e\u968e\u5c64<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><mark>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306f\u3001\uff17\u3064\u306e\u968e\u5c64\u306b\u5206\u304b\u308c\u3066\u3044\u3066\u3001\u305d\u308c\u305e\u308c\u306e\u968e\u5c64\u3067\u7570\u306a\u308b\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u307e\u3059\u3002<\/mark><\/strong>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306e\uff17\u3064\u306e\u968e\u5c64\u306e\u9806\u5e8f\u3092\u6697\u8a18\u3059\u308b\u5834\u5408\u3001\u305d\u308c\u305e\u308c\u306e\u968e\u5c64\u306e\u982d\u6587\u5b57\u3092\u53d6\u3063\u3066\u300c\u30a2\u30d7\u30bb\u30c8\u30cd\u30c7\u30d6\u300d\u3068\u899a\u3048\u3089\u308c\u305f\u308a\u3057\u3066\u3044\u307e\u3059\u3002\u672c\u8a18\u4e8b\u3067\u3001OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306e\u5404\u968e\u5c64\u306e\u5f79\u5272\u3092\u3054\u7d39\u4ecb\u81f4\u3057\u307e\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%82%A4%E3%83%A4%E3%83%BC1%EF%BC%9A%E7%89%A9%E7%90%86%E5%B1%A4\"><\/span>\u30ec\u30a4\u30e4\u30fc1\uff1a\u7269\u7406\u5c64<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong><mark>\u7269\u7406\u5c64\u306f\u3001\u30b1\u30fc\u30d6\u30eb\u3084\u30b3\u30cd\u30af\u30bf\u3001\u96fb\u6c17\u4fe1\u53f7\u306a\u3069\u306e\u7269\u7406\u7684\u306a\u3082\u306e\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002<\/mark><\/strong>\u5177\u4f53\u7684\u306b\u8aac\u660e\u3059\u308b\u3068\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u7406\u89e3\u3067\u304d\u308b\u30c7\u30b8\u30bf\u30eb\u30c7\u30fc\u30bf\u3068\u30b1\u30fc\u30d6\u30eb\u304c\u6271\u3046\u96fb\u6c17\u4fe1\u53f7\u3092\u76f8\u4e92\u306b\u5909\u63db\u3059\u308b\u969b\u306e\u6c7a\u307e\u308a\u4e8b\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30b3\u30cd\u30af\u30bf\u306e\u30d4\u30f3\u306e\u6570\u3001\u30b3\u30cd\u30af\u30bf\u5f62\u72b6\u306e\u898f\u5b9a\u3084\u3001\u9285\u7dda-\u5149\u30d5\u30a1\u30a4\u30d0\u9593\u306e\u96fb\u6c17\u4fe1\u53f7\u306e\u5909\u63db\u306b\u95a2\u308f\u308a\u307e\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%82%A4%E3%83%A4%E3%83%BC2%EF%BC%9A%E3%83%87%E3%83%BC%E3%82%BF%E3%83%AA%E3%83%B3%E3%82%AF%E5%B1%A4\"><\/span>\u30ec\u30a4\u30e4\u30fc2\uff1a\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong><mark>\u30c7\u30fc\u30bf\u30ea\u30f3\u30af\u5c64\u306f\u3001\u76f4\u306b\u7e4b\u304c\u3063\u3066\u3044\u308b\u6a5f\u5668\u3078\u306e\u4fe1\u53f7\u306e\u53d7\u3051\u6e21\u3057\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002<\/mark><\/strong>\u5177\u4f53\u7684\u306b\u8aac\u660e\u3059\u308b\u3068\u3001\u8ab0\u304b\u3089\u8ab0\u306b\u4f1d\u9001\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306a\u306e\u304b\u3092\u5224\u65ad\u3057\u3001\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u5143\u3068\u9001\u4fe1\u5148\u306e\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u3066\u3001\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u304c\u53ef\u80fd\u304b\u3069\u3046\u304b\u3092\u3069\u3046\u3084\u3063\u3066\u5224\u5b9a\u3059\u308b\u304b\u5b9a\u3081\u305f\u3082\u306e\u3067\u3059\u3002\u30eb\u30fc\u30eb\u306e\u4e2d\u306b\u306f\u3001\u4f1d\u9001\u4e2d\u306e\u30a8\u30e9\u30fc\u767a\u751f\u6642\u306b\u95a2\u3059\u308b\u30eb\u30fc\u30eb\u3082\u5b9a\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%82%A4%E3%83%A4%E3%83%BC3%EF%BC%9A%E3%83%8D%E3%83%83%E3%83%88%E3%83%AF%E3%83%BC%E3%82%AF%E5%B1%A4\"><\/span>\u30ec\u30a4\u30e4\u30fc3\uff1a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong><mark>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u306f\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9593\u306e\u901a\u4fe1\u306b\u3064\u3044\u3066\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002<\/mark><\/strong>\u5177\u4f53\u7684\u306b\u8aac\u660e\u3059\u308b\u3068\u3001\u7570\u306a\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3078\u306e\u901a\u4fe1\u3092\u884c\u3046\u969b\u306b\u3001\u3069\u306e\u3088\u3046\u306a\u901a\u4fe1\u7d4c\u8def\u3067\u901a\u4fe1\u3092\u884c\u3044\u3001\u3069\u306e\u3088\u3046\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u304b\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u3001\u30c7\u30fc\u30bf\u306e\u9001\u4fe1\u5148\u3084\u9001\u4fe1\u5143\u3092\u7279\u5b9a\u3067\u304d\u308b\u30a2\u30c9\u30ec\u30b9\u306e\u5272\u308a\u5f53\u3066\u65b9\u6cd5\u306a\u3069\u3082\u5b9a\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%82%A4%E3%83%A4%E3%83%BC4%EF%BC%9A%E3%83%88%E3%83%A9%E3%83%B3%E3%82%B9%E3%83%9D%E3%83%BC%E3%83%88%E5%B1%A4\"><\/span>\u30ec\u30a4\u30e4\u30fc4\uff1a\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong><mark>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306f\u3001\u901a\u4fe1\u306e\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u6c7a\u307e\u308a\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002<\/mark><\/strong>\u5177\u4f53\u7684\u306b\u8aac\u660e\u3059\u308b\u3068\u3001\u9001\u4fe1\u5143\u304b\u3089\u9001\u4fe1\u5148\u306b\u3001\u78ba\u5b9f\u306b\u30c7\u30fc\u30bf\u304c\u6b63\u3057\u304f\u9001\u4fe1\u3055\u308c\u308b\u305f\u3081\u306e\u6c7a\u307e\u308a\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002\u4e00\u5ea6\u306b\u4f1d\u9001\u3067\u304d\u308b\u30b5\u30a4\u30ba\u306b\u5206\u5272\u3057\u3066\u9001\u4fe1\u3057\u3001\u5206\u5272\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u9806\u756a\u3069\u304a\u308a\u306b\u623b\u3059\u3053\u3068\u3084\u3001\u901a\u4fe1\u9014\u4e2d\u3067\u30c7\u30fc\u30bf\u306b\u4f55\u3089\u304b\u306e\u554f\u984c\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u6c7a\u307e\u308a\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%82%A4%E3%83%A4%E3%83%BC5%EF%BC%9A%E3%82%BB%E3%83%83%E3%82%B7%E3%83%A7%E3%83%B3%E5%B1%A4\"><\/span>\u30ec\u30a4\u30e4\u30fc5\uff1a\u30bb\u30c3\u30b7\u30e7\u30f3\u5c64<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong><mark>\u30bb\u30c3\u30b7\u30e7\u30f3\u5c64\u306f\u3001\u901a\u4fe1\u958b\u59cb\u304b\u3089\u7d42\u4e86\u307e\u3067\u306e\u624b\u9806\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002<\/mark><\/strong>\u5177\u4f53\u7684\u306b\u8aac\u660e\u3059\u308b\u3068\u3001\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u304c\u78ba\u7acb\u3057\u3066\u304b\u3089\u5207\u65ad\u307e\u3067\u306e\u901a\u4fe1\u306e\u4e00\u9023\u306e\u624b\u9806\u3092\u7ba1\u7406\u3059\u308b\u6c7a\u307e\u308a\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002\u4f8b\u3092\u6319\u3052\u308b\u3068\u3001\u30ed\u30b0\u30a4\u30f3\u958b\u59cb\u304b\u3089\u30ed\u30b0\u30a2\u30a6\u30c8\u307e\u3067\u306e\u6d41\u308c\u3084\u3001\u30b7\u30e7\u30c3\u30d4\u30f3\u30b0\u30b5\u30a4\u30c8\u3067\u8cfc\u5165\u30dc\u30bf\u30f3\u62bc\u4e0b\u304b\u3089\u60c5\u5831\u5165\u529b\u3092\u7d4c\u3066\u3001\u8cfc\u5165\u304c\u78ba\u5b9a\u3059\u308b\u307e\u3067\u306e\u6d41\u308c\u3092\u5b9a\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%82%A4%E3%83%A4%E3%83%BC6%EF%BC%9A%E3%83%97%E3%83%AC%E3%82%BC%E3%83%B3%E3%83%86%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3%E5%B1%A4\"><\/span>\u30ec\u30a4\u30e4\u30fc6\uff1a\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u5c64<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong><mark>\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u5c64\u306f\u3001\u6587\u5b57\u30b3\u30fc\u30c9\u3084\u5727\u7e2e\u65b9\u5f0f\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002<\/mark><\/strong>\u5177\u4f53\u7684\u306b\u8aac\u660e\u3059\u308b\u3068\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u540c\u58eb\u306e\u30c7\u30fc\u30bf\u5f62\u5f0f\u3084\u5727\u7e2e\u65b9\u5f0f\u306a\u3069\u3092\u5408\u308f\u305b\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u6587\u5b57\u3084\u6620\u50cf\u30c7\u30fc\u30bf\u3001\u97f3\u58f0\u30c7\u30fc\u30bf\u306a\u3069\u306b\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u9055\u3046\u3053\u3068\u306b\u3088\u3063\u3066\u8d77\u3053\u308b\u4e0d\u5177\u5408\u304c\u751f\u3058\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u6c7a\u307e\u308a\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u5c64\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5411\u4e0a\u306e\u305f\u3081\u306e\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u51e6\u7406\u3082\u62c5\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%83%AC%E3%82%A4%E3%83%A4%E3%83%BC7%EF%BC%9A%E3%82%A2%E3%83%97%E3%83%AA%E3%82%B1%E3%83%BC%E3%82%B7%E3%83%A7%E3%83%B3%E5%B1%A4\"><\/span>\u30ec\u30a4\u30e4\u30fc7\uff1a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><strong><mark>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3068\u306e\u76f4\u63a5\u7684\u306a\u6a4b\u6e21\u3057\u3068\u306a\u308b\u6c7a\u307e\u308a\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002<\/mark><\/strong>\u5177\u4f53\u7684\u306b\u8aac\u660e\u3059\u308b\u3068\u3001\u30d5\u30a1\u30a4\u30eb\u3084\u30e1\u30fc\u30eb\u306a\u3069\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30ec\u30d9\u30eb\u306e\u30c7\u30fc\u30bf\u306e\u3084\u308a\u53d6\u308a\u306b\u95a2\u3059\u308b\u6c7a\u307e\u308a\u3092\u5b9a\u3081\u305f\u5c64\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001Web\u30b5\u30a4\u30c8\u3067\u3042\u308c\u3070\u300chttp\u300d\u3001\u30e1\u30fc\u30eb\u3067\u3042\u308c\u3070\u300csmtp\u300d\u3084\u300cpop3\u300d\u3068\u3044\u3063\u305f\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5b9a\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"OSI%E5%8F%82%E7%85%A7%E3%83%A2%E3%83%87%E3%83%AB%E3%81%AE%E3%82%AB%E3%83%97%E3%82%BB%E3%83%AB%E5%8C%96\"><\/span>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306e\u30ab\u30d7\u30bb\u30eb\u5316<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img src=\"https:\/\/cdn.pixabay.com\/photo\/2019\/04\/03\/09\/24\/pills-4099839_960_720.jpg\" \/><\/p>\n<p>\u9001\u4fe1\u3059\u308b\u5074\u3067\u6d41\u308c\u308b\u51e6\u7406\u3068\u3001\u53d7\u4fe1\u3059\u308b\u5074\u3067\u6d41\u308c\u308b\u51e6\u7406\u3067\u306f\u9806\u5e8f\u304c\u7570\u306a\u308a\u307e\u3059\u3002<strong><mark>\u30ab\u30d7\u30bb\u30eb\u5316\u306f\u9001\u4fe1\u3059\u308b\u5074\u3067\u6d41\u308c\u308b\u51e6\u7406\u3067\u6d3b\u7528\u3055\u308c\u3001\u975e\u30ab\u30d7\u30bb\u30eb\u5316\u306f\u53d7\u4fe1\u3059\u308b\u5074\u3067\u6d41\u308c\u308b\u51e6\u7406\u3067\u6d3b\u7528\u3055\u308c\u307e\u3059\u3002<\/mark><\/strong>\u3053\u306e\u30ab\u30d7\u30bb\u30eb\u5316\u3068\u975e\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u3064\u3044\u3066\u3001\u305d\u308c\u305e\u308c\u5206\u3051\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%AB%E3%83%97%E3%82%BB%E3%83%AB%E5%8C%96\"><\/span>\u30ab\u30d7\u30bb\u30eb\u5316<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><mark>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3067\u8a00\u3046\u3068\u3001\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u969b\u306f\u30ec\u30a4\u30e4\u30fc\uff17\u304b\u3089\u30ec\u30a4\u30e4\u30fc\uff11\u3078\u3068\u9806\u306b\u51e6\u7406\u3055\u308c\u3001\u305d\u306e\u51e6\u7406\u3057\u305f\u60c5\u5831\u3092\u30d8\u30c3\u30c0\u3068\u3057\u3066\u30c7\u30fc\u30bf\u306e\u524d\u306b\u4ed8\u52a0\u3055\u305b\u3066\u3044\u304f\u3053\u3068\u3001\u3064\u307e\u308a\u3001\u4e0a\u4f4d\u306e\u51e6\u7406\u3055\u308c\u305f\u60c5\u5831\u3092\u5305\u307f\u8fbc\u3080\u3088\u3046\u306b\u4e0b\u4f4d\u306e\u5c64\u3078\u3068\u6d41\u3057\u3066\u3044\u304f\u3053\u3068\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3068\u3044\u3044\u307e\u3059\u3002<\/mark><\/strong>\u6700\u7d42\u7684\u306b\u306f\u30ec\u30a4\u30e4\u30fc\uff11\u3067\u96fb\u6c17\u4fe1\u53f7\u3068\u306a\u3063\u3066\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E9%9D%9E%E3%82%AB%E3%83%97%E3%82%BB%E3%83%AB%E5%8C%96\"><\/span>\u975e\u30ab\u30d7\u30bb\u30eb\u5316<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><mark>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3067\u8a00\u3046\u3068\u3001\u30ab\u30d7\u30bb\u30eb\u5316\u3055\u308c\u305f\u72b6\u614b\u306e\u60c5\u5831\u3092\u3001\u30ec\u30a4\u30e4\u30fc\uff11\u304b\u3089\u30ec\u30a4\u30e4\u30fc\uff17\u3068\u3044\u3046\u9806\u3067\u51e6\u7406\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u9001\u4fe1\u5074\u3067\u30d8\u30c3\u30c0\u3068\u3057\u3066\u53d6\u308a\u4ed8\u3051\u305f\u60c5\u5831\u3092\u5916\u3057\u3066\u3044\u304f\u3053\u3068\u3092\u975e\u30ab\u30d7\u30bb\u30eb\u5316\u3068\u3044\u3044\u307e\u3059\u3002<\/mark><\/strong>\u6700\u7d42\u7684\u306b\u306f\u53d7\u4fe1\u5074\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u4e0a\u3067\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%AF%BE%E5%BF%9C%E6%A9%9F%E5%99%A8%E3%81%AE%E4%BE%8B\"><\/span>\u5bfe\u5fdc\u6a5f\u5668\u306e\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img src=\"https:\/\/www.pakutaso.com\/shared\/img\/thumb\/USBFTHG1148_TP_V.jpg\" \/><\/p>\n<p><strong><mark>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306e\u5404\u5c64\u306b\u306f\u3001\u305d\u308c\u305e\u308c\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u6a5f\u5668\u304c\u3042\u308a\u307e\u3059\u3002<\/mark><\/strong>\u5bfe\u5fdc\u6a5f\u5668\u306f\u3001\u5404\u5c64\u306b\u6c7a\u307e\u3063\u305f1\u3064\u306e\u6a5f\u5668\u3068\u3044\u3046\u8a33\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u305d\u306e\u4e2d\u3067\u3082\u4ee3\u8868\u7684\u306a\u5bfe\u5fdc\u6a5f\u5668\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%AA%E3%83%94%E3%83%BC%E3%82%BF\"><\/span>\u30ea\u30d4\u30fc\u30bf<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/cdn.pixabay.com\/photo\/2017\/11\/12\/18\/52\/repeater-2943432_960_720.jpg\" \/><\/p>\n<p><strong><mark>\u30ea\u30d4\u30fc\u30bf\u306f\u3001OSI\u53c2\u7167\u30e2\u30c7\u30eb\u3067\u8a00\u3046\u7269\u7406\u5c64\u306e\u5bfe\u5fdc\u6a5f\u5668\u3067\u3059\u3002<\/mark><\/strong>\u30ea\u30d4\u30fc\u30bf\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u4e2d\u7d99\u306e\u5f79\u5272\u3092\u62c5\u3044\u3001\u6e1b\u8870\u3057\u305f\u4fe1\u53f7\u3092\u5897\u5e45\u3055\u305b\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u9060\u304f\u96e2\u308c\u305f\u6a5f\u5668\u306b\u4f55\u3089\u304b\u306e\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u3088\u3046\u3068\u3059\u308b\u5834\u5408\u3001\u30ea\u30d4\u30fc\u30bf\u304c\u7121\u3051\u308c\u3070\u4fe1\u53f7\u306f\u9014\u4e2d\u3067\u7d76\u3048\u3066\u3057\u307e\u3044\u3001\u9060\u304f\u96e2\u308c\u305f\u5bfe\u8c61\u306e\u6a5f\u5668\u306b\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3002\u3044\u308f\u3070\u3001\u5ef6\u9577\u30b3\u30fc\u30c9\u306e\u3088\u3046\u306a\u5f79\u5272\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"HUB\/L2%E3%82%B9%E3%82%A4%E3%83%83%E3%83%81\"><\/span>HUB\/L2\u30b9\u30a4\u30c3\u30c1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/cdn.pixabay.com\/photo\/2013\/07\/13\/12\/33\/computer-159835_960_720.png\" 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class=\"ez-toc-section\" id=\"%E3%83%AB%E3%83%BC%E3%82%BF\/L3%E3%82%B9%E3%82%A4%E3%83%83%E3%83%81\"><\/span>\u30eb\u30fc\u30bf\/L3\u30b9\u30a4\u30c3\u30c1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img src=\"https:\/\/www.pakutaso.com\/shared\/img\/thumb\/5G1478_TP_V.jpg\" 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