{"id":2628,"date":"2020-04-06T10:46:42","date_gmt":"2020-04-06T01:46:42","guid":{"rendered":"https:\/\/www.bold.ne.jp\/engineer-club\/?post_type=study_report&#038;p=2628"},"modified":"2020-04-06T10:46:42","modified_gmt":"2020-04-06T01:46:42","slug":"18second-half-network-basic-vol-3","status":"publish","type":"study_report","link":"https:\/\/www.bold.ne.jp\/engineer-club\/study_report\/18second-half-network-basic-vol-3","title":{"rendered":"18\u4e0b\u671f \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u57fa\u790e\u52c9\u5f37\u4f1a\u30ec\u30dd\u30fc\u30c8 Vol.3"},"content":{"rendered":"<h2><strong>\uff11\uff0e\u4eca\u56de\u306e\u30c6\u30fc\u30de\u3068\u5185\u5bb9<\/strong><\/h2>\n<p>\u4eca\u56de\u306e\u30c6\u30fc\u30de\u306f\u3001\u300c\u904e\u53bb<span>2<\/span>\u56de\u306e\u7dcf\u307e\u3068\u3081\u300d\u3068\u300c\u767a\u5c55\u7684\u5185\u5bb9\u300d\u3067\u3059\u3002<br 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\/>\n\u4eca\u56de\u306f\u300c\u691c\u5b9a\u8a66\u9a13\u300d\u3092\u884c\u3044\u307e\u3059\u306e\u3067\u3001\u3044\u3064\u3082\u3088\u308a\u66f4\u306b\u7dca\u5f35\u611f\u9ad8\u3081\u306a\u8b1b\u7fa9\u306e\u4e88\u611f\u3067\u3059\u304c\u3001\u53d7\u8b1b\u751f\u306e\u307f\u306a\u3055\u3093\u3001\u6c17\u3092\u5f15\u304d\u7de0\u3081\u3066\u3057\u3063\u304b\u308a\u3068\u52c9\u5f37\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u4eca\u56de\u306f\u3001\u8b1b\u7fa9\u306e\u958b\u59cb\u524d\u306b\u65e9\u3081\u306b\u6765\u3066\u3001\u81ea\u7fd2\u3059\u308b\u53d7\u8b1b\u751f\u306e\u59ff\u3082\u3061\u3089\u307b\u3089\u3068\u898b\u53d7\u3051\u3089\u308c\u3001\u53d7\u8b1b\u751f\u306e\u610f\u6c17\u8fbc\u307f\u3068\u7dca\u5f35\u611f\u304c\u3088\u304f\u4f1d\u308f\u3063\u3066\u304d\u307e\u3059\uff01<br \/>\n\u3067\u306f\u3001\u305d\u3093\u306a\u7dca\u5f35\u611f\u9ad8\u3081\u306e\u7b2c<span>3<\/span>\u56de\u8b1b\u7fa9\u306e\u69d8\u5b50\u3092\u8997\u3044\u3066\u307f\u307e\u3057\u3087\u3046\u3002<br \/>\n\u306a\u304a\u3001\u4eca\u56de\u3082\u8b1b\u7fa9\u5185\u5bb9\u3092\u4e8b\u7d30\u304b\u306b\u306f\u8a18\u8f09\u3067\u304d\u307e\u305b\u3093\u306e\u3067\u3001\u3042\u3057\u304b\u3089\u305a\u3002<\/p>\n<h3><strong>\uff11-\uff11\uff0e\u904e\u53bb<span>2<\/span>\u56de\u306e\u7dcf\u307e\u3068\u3081<\/strong><\/h3>\n<p>\u3053\u308c\u307e\u3067\u306e<span>2<\/span>\u56de\u306e\u958b\u50ac\u3067\u52c9\u5f37\u3057\u3066\u304d\u305f\u3053\u3068\u3092\u632f\u308a\u8fd4\u3063\u3066\u3001\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\n\u53d7\u8b1b\u751f\u306e\u307f\u306a\u3055\u3093\u306f\u5404\u81ea\u3067\u5fa9\u7fd2\u3092\u3057\u3066\u3044\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u6b63\u3057\u304f\u7406\u89e3\u3057\u3066\u3044\u308b\u304b\u3092\u8b1b\u5e2b\u3068\u4e00\u7dd2\u306b\u78ba\u8a8d\u3059\u308b\u6a5f\u4f1a\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7a2e\u985e\u304b\u3089\u59cb\u307e\u308a\u3001<span>IP<\/span>\u30a2\u30c9\u30ec\u30b9\u307e\u3067\u3057\u3063\u304b\u308a\u3068\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"733\" height=\"653\" class=\"aligncenter wp-image-2631 size-full\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/002.png\" \/><\/p>\n<p>\u8b1b\u5e2b\uff1a\u307e\u305a\u306f\u3001\u300c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7a2e\u985e\u300d\u304b\u3089\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3059\u3001\u63a5\u7d9a\u5f62\u614b\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u898f\u6a21\u306b\u3088\u308a\u9055\u3044\u304c\u3042\u308a\u307e\u3057\u305f\u304c\u3061\u3083\u3093\u3068\u899a\u3048\u3066\u3044\u307e\u3059\u304b\uff1f<br \/>\n\u53d7\u8b1b\u751f\uff1a\u899a\u3048\u3066\u3044\u307e\u3059\uff01\uff01<br \/>\n\u8b1b\u5e2b\uff1a\u3067\u306f\u3001\u3069\u3093\u306a\u7a2e\u985e\u304c\u3042\u3063\u305f\u304b\u7b54\u3048\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\n\u3068\u3001\u3044\u3064\u3082\u306e\u8b1b\u7fa9\u30b9\u30bf\u30a4\u30eb\u3067\u958b\u59cb\u3055\u308c\u307e\u3057\u305f\u3002<br \/>\n\u524d\u56de\u307e\u3067\u306e\u8b1b\u7fa9\u3088\u308a\u3001\u65e9\u3044\u30da\u30fc\u30b9\u3067\u9032\u3093\u3067\u3044\u304d\u307e\u3059\u304c\u3001\u5fa9\u7fd2\u3067\u3059\u306e\u3067\u8cea\u554f\u3055\u308c\u305f\u53d7\u8b1b\u751f\u3082\u30b9\u30e9\u30b9\u30e9\u3068\u7b54\u3048\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\n\u307f\u306a\u3055\u3093\u3001\u3057\u3063\u304b\u308a\u3068\u5fa9\u7fd2\u3057\u3066\u304d\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"550\" height=\"336\" class=\"size-medium wp-image-2632 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/003-550x336.png\" \/><\/p>\n<p>\uff08\uff11\uff09\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7a2e\u985e<br \/>\n\u3000\u3000\u2460LAN\uff08\u30ed\u30fc\u30ab\u30eb\u30fb\u30a8\u30ea\u30a2\u30fb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff09<br \/>\n\u3000\u3000\u2461WAN\uff08\u30ef\u30a4\u30c9\u30fb\u30a8\u30ea\u30a2\u30fb\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff09<br \/>\n\u3000\u3000\u2462Intra Net\uff08\u30a4\u30f3\u30c8\u30e9\u30cd\u30c3\u30c8\uff09<br \/>\n\u3000\u3000\u2463Inter Net\uff08\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\uff09<\/p>\n<p>\uff08\uff12\uff09\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u69cb\u6210\u8981\u7d20<br \/>\n\u3000\u3000\u2460\u30db\u30b9\u30c8<br \/>\n\u3000\u3000\u2461\u30eb\u30fc\u30bf\u30fc<br \/>\n\u3000\u3000\u2462\u30b9\u30a4\u30c3\u30c1<br \/>\n\u3000\u3000\u2463\u305d\u306e\u4ed6<\/p>\n<p>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u69cb\u6210\u8981\u7d20\u3067\u306f\u3001\u56f3\u3092\u4f7f\u3063\u3066\u518d\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u7528\u8a9e\u3084\u7528\u8a9e\u306e\u610f\u5473\u3092\u899a\u3048\u308b\u3053\u3068\u3082\u5927\u5207\u3067\u3059\u304c\u3001\u4e00\u7dd2\u306b\u30a4\u30e1\u30fc\u30b8\u51fa\u6765\u308b\u3088\u3046\u306b\u306a\u308b\u3068\u7406\u89e3\u304c\u6df1\u307e\u308a\u307e\u3059\u306e\u3067\u3001\u30a4\u30e1\u30fc\u30b8\u56f3\u3068\u4e00\u7dd2\u306b\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"484\" height=\"135\" class=\"size-full wp-image-2633 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/004.png\" \/><\/p>\n<p>\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u6df7\u4e71\u3057\u3084\u3059\u3044\u7528\u8a9e\u3082\u6574\u7406\u3057\u3066\u899a\u3048\u3089\u308c\u307e\u3059\u306d\uff01\u3055\u3059\u304c\u3067\u3059\uff01<\/p>\n<p>\uff08\uff13\uff09\u30d7\u30ed\u30c8\u30b3\u30eb<br \/>\n\u3000\u3000\u2460TCP\uff08<span>Transmission Control Protocol<\/span>\uff09<br \/>\n\u3000\u3000\u2461IP\uff08<span>Internet Protocol<\/span>\uff09<br \/>\n\u3000\u3000\u2462UDP\uff08<span>User Datagram Protocol<\/span>\uff09<\/p>\n<p>\u305d\u308c\u305e\u308c\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u7528\u9014\u306b\u3064\u3044\u3066\u3082\u53d7\u8b1b\u751f\u306b\u8cea\u554f\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u8b1b\u5e2b\uff1a<span>UDP<\/span>\u306e\u7279\u5fb4\u3068\u3069\u3093\u306a\u7528\u9014\u3067\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u304b\uff1f<br \/>\n\u53d7\u8b1b\u751f\uff1a\u901a\u4fe1\u901f\u5ea6\u304c\u901f\u304f\u3001\u52d5\u753b\u306e\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u914d\u4fe1\u306a\u3069\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306a\u901a\u4fe1\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\uff01<br \/>\n\u8b1b\u5e2b\uff1a\u6b63\u89e3\uff01\u3088\u304f\u3067\u304d\u307e\u3057\u305f\uff01<\/p>\n<p>\u304a\u3049\uff5e\u3001\u304a\u898b\u4e8b\uff01\u3057\u3063\u304b\u308a\u3068\u5fa9\u7fd2\u3057\u3066\u304d\u3066\u307e\u3059\u306d\u3002\u3068\u3063\u3066\u3082<span>Good<\/span>\u3067\u3059\u3002<\/p>\n<p>\uff08\uff14\uff09\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30e2\u30c7\u30eb<br \/>\n\u3000\u3000\u2460OSI\u53c2\u7167\u30e2\u30c7\u30eb<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"550\" height=\"336\" class=\"size-medium wp-image-2634 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/005-550x336.png\" \/><br \/>\n\u5b9f\u969b\u306b\u30e1\u30fc\u30eb\u306e\u9001\u4fe1\u624b\u9806\u3092\u3001\u56f3\u3092\u4f7f\u3063\u3066\u632f\u308a\u8fd4\u308a\u307e\u3059\u304c\u3001\u307f\u306a\u3055\u3093\u899a\u3048\u3066\u3044\u307e\u3057\u305f\u304b\uff1f<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"537\" height=\"279\" class=\"size-full wp-image-2635 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/006.png\" \/><\/p>\n<p>\u3053\u3053\u307e\u3067\u304c\u3001<span>1<\/span>\u56de\u76ee\u306e\u5fa9\u7fd2\u3067\u3059\u3002<br \/>\n\u3053\u306e\u5f8c\u306b\u300c\u691c\u5b9a\u8a66\u9a13\u300d\u304c\u63a7\u3048\u3066\u3044\u308b\u305f\u3081\u304b\u7dca\u5f35\u6c17\u5473\u306e\u53d7\u8b1b\u751f\u3067\u3057\u305f\u304c\u3001\u3044\u3064\u3082\u306e\u8b1b\u7fa9\u30b9\u30bf\u30a4\u30eb\u3067\u9032\u3081\u3066\u3044\u304f\u3046\u3061\u306b\u7dca\u5f35\u3082\u89e3\u3051\u3066\u304d\u305f\u69d8\u5b50\u3067\u3059\u3002<br \/>\n\u4eca\u56de\u3082\u5c02\u7528\u8b1b\u7fa9\u30ce\u30fc\u30c8\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u53d7\u8b1b\u751f\u306e\u307f\u306a\u3055\u3093\u306f\u6301\u53c2\u3057\u305f\u904e\u53bb\u306e\u8b1b\u7fa9\u8cc7\u6599\u3068\u5408\u308f\u305b\u3066\uff11\u3064\uff11\u3064\u78ba\u8a8d\u3057\u3066\u3044\u307e\u3059\u306d\u3002\u3053\u308c\u306a\u3089\u304d\u3063\u3068\u5408\u683c\u9593\u9055\u3044\u306a\u3057\u3067\u3059\u306d\uff01<\/p>\n<p>\u3055\u3042\u3001\u7d9a\u3044\u3066<span>2<\/span>\u56de\u76ee\u306e\u5fa9\u7fd2\u306b\u5165\u3063\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\n\u3044\u3064\u3082\u3088\u308a\u30cf\u30a4\u30da\u30fc\u30b9\u3067\u9032\u3093\u3067\u3044\u307e\u3059\u304c\u3001\u3057\u3063\u304b\u308a\u3068\u3064\u3044\u3066\u304d\u3066\u304f\u3060\u3055\u3044\u306d\uff01<\/p>\n<p>\uff08\uff15\uff09<span>IP<\/span>\u30a2\u30c9\u30ec\u30b9<br \/>\n\u3000\u3000\u2460IPv4\u306e\u7279\u5fb4<br \/>\n\u3000\u3000\u2461IP\u30a2\u30c9\u30ec\u30b9\u306e\u8868\u8a18\u65b9\u6cd5<br \/>\n\u3000\u3000\u2462\u30a2\u30c9\u30ec\u30b9\u30fb\u30af\u30e9\u30b9\uff08\u30af\u30e9\u30b9<span>A<\/span>\uff5e\u30af\u30e9\u30b9<span>E<\/span>\uff09<br \/>\n\u3000\u3000\u2463\u30b0\u30ed\u30fc\u30d0\u30eb\u30a2\u30c9\u30ec\u30b9\u3068\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30a2\u30c9\u30ec\u30b9<br \/>\n\u3000\u3000\u2464\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a2\u30c9\u30ec\u30b9\u3068\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u30a2\u30c9\u30ec\u30b9<br \/>\n\u3000\u3000\u2465\u30b5\u30d6\u30cd\u30c3\u30c8\u5206\u5272<\/p>\n<p>2\u56de\u76ee\u306e\u8b1b\u7fa9\u306f\u300c<span>IP<\/span>\u30a2\u30c9\u30ec\u30b9\u300d\u306b\u3064\u3044\u3066\u3067\u3057\u305f\u3002IP\u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u52c9\u5f37\u3059\u308b\u4e0a\u3067\u907f\u3051\u3066\u306f\u901a\u308c\u307e\u305b\u3093\u306e\u3067\u3001\u7e70\u308a\u8fd4\u3057\u52c9\u5f37\u3059\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\u3002<br \/>\n\u4eca\u56de\u306e\u7dcf\u307e\u3068\u3081\u3067\u3082\u540c\u3058\u8cea\u554f\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3001\u53d7\u8b1b\u751f\u306b\u3057\u3063\u304b\u308a\u3068\u610f\u8b58\u4ed8\u3051\u3057\u3066\u3044\u307e\u3057\u305f\u3002<br \/>\n\u3053\u3046\u3084\u3063\u3066\u672c\u5f53\u306b\u5927\u5207\u306a\u30dd\u30a4\u30f3\u30c8\u3092\u4f1d\u3048\u3066\u3044\u308b\u306e\u3067\u3059\u306d\u3002\u306a\u308b\u307b\u3069\u52c9\u5f37\u306b\u306a\u308a\u307e\u3059\uff01<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"550\" height=\"336\" class=\"size-medium wp-image-2636 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/007-550x336.png\" \/><\/p>\n<p>\u3053\u308c\u3067\u3001\u904e\u53bb<span>2<\/span>\u56de\u306e\u7dcf\u307e\u3068\u3081\u306f\u7d42\u308f\u308a\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n\u53d7\u8b1b\u751f\u306e\u307f\u306a\u3055\u3093\u3001\u3044\u304b\u304c\u3067\u3057\u305f\u304b\uff1f\u3057\u3063\u304b\u308a\u3068\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u304b\uff1f<br \/>\n\u8b1b\u7fa9\u306f\u3001\u3082\u3046\u5c11\u3057\u7d9a\u304d\u307e\u3059\u306e\u3067\u3001\u3057\u3063\u304b\u308a\u3068\u96c6\u4e2d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n<h3><strong>\uff11-\uff12\uff0e\u767a\u5c55\u7684\u5185\u5bb9<\/strong><\/h3>\n<p>\u3053\u3053\u304b\u3089\u306f\u3001\u4eca\u5f8c\u306b\u7e4b\u304c\u308b\u305f\u3081\u306e\u77e5\u8b58\u3092\u5c11\u3057\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\n\u65e2\u306b\u77e5\u3063\u3066\u3044\u308b\u3053\u3068\u3001\u73fe\u5834\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u3082\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u81ea\u5206\u306e\u7406\u89e3\u304c\u6b63\u3057\u3044\u304b\u3092\u78ba\u8a8d\u3057\u306a\u304c\u3089\u805e\u3044\u3066\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"731\" height=\"351\" class=\"aligncenter wp-image-2637 size-full\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/008.png\" \/><\/p>\n<p>\uff08\uff11\uff09\u30af\u30e9\u30b9<span>B<\/span>\u306e\u30b5\u30d6\u30cd\u30c3\u30c8\u5206\u5272<br \/>\n\u3000\u3000\u2460\u8003\u3048\u65b9\u306f\u3001\u30af\u30e9\u30b9<span>C<\/span>\u306e\u6642\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n<p>\u8b1b\u5e2b\uff1a\u30b5\u30d6\u30cd\u30c3\u30c8\u5206\u5272\u306e\u8003\u3048\u65b9\u306f\u3069\u306e\u30af\u30e9\u30b9\u3067\u3082\u5909\u308f\u308a\u307e\u305b\u3093\u3002<br \/>\n\u3000\u3000\u3000\u30c6\u30ad\u30b9\u30c8\u306e\u8aac\u660e\u3068\u7df4\u7fd2\u554f\u984c\u3067\u3057\u3063\u304b\u308a\u3068\u7406\u89e3\u3092\u6df1\u3081\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\n\u3000\u3000\u3000\u5b9f\u969b\u306b\u81ea\u5206\u3067\u3084\u3063\u3066\u307f\u308b\u3053\u3068\u304c\u5927\u5207\u3067\u3059\uff01<br \/>\n\u53d7\u8b1b\u751f\uff1a\u306f\u3044\uff01<\/p>\n<p>\uff08\uff12\uff09<span>Windows<\/span>\u3067\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u78ba\u8a8d\u30b3\u30de\u30f3\u30c9<br \/>\n\u3000\u3000\u2460tracert (traceroute)\u30b3\u30de\u30f3\u30c9\u3000\u203b\uff08\uff09\u5185\u306f<span>Linux<\/span>\u306e\u30b3\u30de\u30f3\u30c9<br \/>\n\u3000\u3000\u3000\u901a\u4fe1\u306e\u3042\u3066\u5148\u3068\u306a\u308b\u30db\u30b9\u30c8\uff08\u30b5\u30fc\u30d0\u30fc\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306a\u3069\uff09\u307e\u3067\u306e\u901a\u4fe1\u7d4c\u8def\u3092\u8868\u793a\u3059\u308b\u3002<br \/>\n\u3000\u3000\u3000\u76ee\u7684\u3068\u306a\u308b\u7d4c\u8def\u306b\u5bfe\u3059\u308b\u758e\u901a\u78ba\u8a8d\u306b\u3082\u4f7f\u3046\u3053\u3068\u304c\u51fa\u6765\u3001\u969c\u5bb3\u3068\u306a\u308b\u5834\u6240\u306e\u7279\u5b9a\u306b\u3082\u6d3b\u7528\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"400\" height=\"192\" class=\"size-full wp-image-2638 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/009.png\" \/><\/p>\n<p>\u3000\u3000\u2461nslookup\u30b3\u30de\u30f3\u30c9<br \/>\n\u3000\u3000\u3000DNS\u3092\u5229\u7528\u3057\u3066\u3001<span>FQDN<\/span>\u304b\u3089<span>IP<\/span>\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u51fa\u6765\u308b\u304b\u7b49\u3092\u78ba\u8a8d\u51fa\u6765\u308b\u30b3\u30de\u30f3\u30c9\u3067\u3001<br \/>\n\u3000\u3000\u3000\u540d\u524d\u89e3\u6c7a\u306e\u969b\u306b\u4f7f\u7528\u3059\u308b\u3002<br \/>\n\u3000\u3000\u3000\u540d\u524d\u89e3\u6c7a\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308a\u3001\u901a\u4fe1\u5148\u30db\u30b9\u30c8\u306b\u7d10\u3065\u3051\u3089\u308c\u305f<span>IP<\/span>\u30a2\u30c9\u30ec\u30b9\u3092\u691c\u7d22\u3057\u3001<br \/>\n\u3000\u3000\u3000\u305d\u306e\u5b9b\u5148\u306b\u5230\u9054\u3059\u308b\u305f\u3081\u306e\u7d4c\u8def\u3092\u691c\u7d22\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"390\" height=\"193\" class=\"size-full wp-image-2639 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/010.png\" \/><\/p>\n<p>\u3000\u3000\u2462netstat\u30b3\u30de\u30f3\u30c9<br \/>\n\u3000\u3000\u3000\u30b5\u30fc\u30d0\u30fc\u4e0a\u3067\u3084\u308a\u53d6\u308a\u3055\u308c\u308b<span>TCP\/IP<\/span>\u306e\u72b6\u614b\u3092\u8868\u793a\u3059\u308b\u3002<br \/>\n\u3000\u3000\u3000netstat\u30b3\u30de\u30f3\u30c9\u306b\u306f\u69d8\u3005\u306a\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u3042\u308b\u304c\u3001\u305d\u308c\u3089\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067<br \/>\n\u3000\u3000\u3000\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u60c5\u5831\u3084\u30dd\u30fc\u30c8\u306e\u5229\u7528\u72b6\u6cc1\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"335\" height=\"193\" class=\"size-full wp-image-2640 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/011.png\" \/><\/p>\n<p>\uff08\uff13\uff09<span>NW<\/span>\u6a5f\u5668\u6a5f\u80fd\u7d39\u4ecb<br \/>\n\u3000\u3000\u2460FW\uff08\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\uff09<br \/>\n\u3000\u3000\u3000\u300c\u9632\u706b\u58c1\u300d\u3092\u610f\u5473\u3059\u308b\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306f\u3001\u7c21\u5358\u306b\u8a00\u3046\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u9593\u306b\u7acb\u3061<br \/>\n\u3000\u3000\u3000\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3059\u308b\u305f\u3081\u306e\u6a5f\u5668\u306e\u3053\u3068\u3002<br \/>\n\u3000\u3000\u3000\u30a2\u30af\u30bb\u30b9\u5143\u306eIP\u30a2\u30c9\u30ec\u30b9\u3084\u3001\u30dd\u30fc\u30c8\u756a\u53f7\u306a\u3069\u306b\u3088\u308a\u30a2\u30af\u30bb\u30b9\u5236\u5fa1\u3092\u884c\u3044\u3001\u5916\u90e8\u304b\u3089\u3060\u3051\u3067\u306a\u304f\u3001<br \/>\n\u3000\u3000\u3000\u5185\u90e8\u304b\u3089\u306e\u901a\u4fe1\u306b\u5bfe\u3057\u3066\u3082\u5236\u5fa1\u3092\u884c\u3046\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"550\" height=\"337\" class=\"size-medium wp-image-2641 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/012-550x337.png\" \/><\/p>\n<p>\u3000\u3000\u2461\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b5\u30fc<br \/>\n\u3000\u3000\u3000\u5916\u90e8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304b\u3089\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u8907\u6570\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5272\u308a\u632f\u308b\u3053\u3068\u3067<br \/>\n\u3000\u3000\u3000\u8ca0\u8377\u3092\u5206\u6563\uff08\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\uff09\u3055\u305b\u308b\u305f\u3081\u306e\u88c5\u7f6e\u306e\u3053\u3068\u3002<br \/>\n\u3000\u3000\u3000\u8ca0\u8377\u5206\u6563\u306e\u4ed5\u7d44\u307f\u304c\u3042\u308b\u3053\u3068\u3067\u3001\u7279\u5b9a\u306e\u30b5\u30fc\u30d0\u30fc\u306b\u5bfe\u3059\u308b\u8ca0\u8377\u304c\u96c6\u4e2d\u3059\u308b\u3053\u3068\u3092\u9632\u3050\u3053\u3068\u304c\u53ef\u80fd\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"360\" height=\"193\" class=\"size-full wp-image-2642 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/013.png\" \/><\/p>\n<p>\u3055\u3042\u3001\u3053\u308c\u3067\u8b1b\u7fa9\u306e\u3059\u3079\u3066\u304c\u7d42\u4e86\u3057\u307e\u3057\u305f\u3002<br \/>\n\u6b21\u306f\u3044\u3088\u3044\u3088\u300c\u691c\u5b9a\u8a66\u9a13\u300d\u3067\u3059\u3002\u307f\u306a\u3055\u3093\u6e96\u5099\u306f\u3044\u3044\u3067\u3059\u304b\u3002<\/p>\n<h2><strong>\uff12\uff0e\u691c\u5b9a\u8a66\u9a13<\/strong><\/h2>\n<p>\u691c\u5b9a\u8a66\u9a13\u306f\u3001<span>40<\/span>\u554f\u3001<span>50<\/span>\u5206\u3067\u5b9f\u65bd\u3055\u308c\u307e\u3059\u3002<br \/>\n\u5408\u683c\u70b9\u306f<span>90<\/span>\u70b9\u4ee5\u4e0a\u3068\u9ad8\u3081\u306e\u8a2d\u5b9a\u3067\u3059\u304c\u3001\u5408\u683c\u306b\u5411\u3051\u3066\u771f\u5263\u306b\u53d6\u308a\u7d44\u3093\u3067\u307b\u3057\u3044\u3068\u3044\u3046\u8b1b\u5e2b\u306e\u601d\u3044\u306e\u73fe\u308c\u3068\u3001\u57fa\u790e\u306e\u57fa\u790e\u306a\u306e\u3067\u3053\u308c\u304f\u3089\u3044\u306f\u53d6\u308c\u306a\u3044\u3068\u56f0\u308b\u3068\u3044\u3046<span>2<\/span>\u3064\u306e\u601d\u3044\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u5408\u683c\u8005\u306b\u306f\u3001\u8a8d\u5b9a\u66f8\u3082\u4ea4\u4ed8\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u5168\u54e1\u5408\u683c\u3059\u308b\u3088\u3046\u306b\u9811\u5f35\u308a\u307e\u3057\u3087\u3046\uff01\uff01<\/p>\n<p>\u8a66\u9a13\u306f\u3001\u9078\u629e\u5f0f\u3068\u8a18\u8ff0\u5f0f\u306e\u4e21\u65b9\u3067\u884c\u3044\u307e\u3059\u3002<br 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src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/015-550x338.png\" \/><\/p>\n<p>30\u5206\u7d4c\u904e\u3002\u3002\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"550\" height=\"338\" class=\"size-medium wp-image-2645 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/016-550x338.png\" \/><\/p>\n<p>40\u5206\u7d4c\u904e\u3002\u3002\u3002\u8a66\u9a13\u304c\u7d42\u308f\u3063\u3066\u3001\u9000\u51fa\u3059\u308b\u65b9\u3082\u3061\u3089\u307b\u3089\u3002<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" width=\"550\" height=\"337\" class=\"size-medium wp-image-2646 aligncenter\" alt=\"\" src=\"https:\/\/www.bold.ne.jp\/engineer-club\/wp-content\/uploads\/2020\/04\/017-550x337.png\" \/><\/p>\n<p>50\u5206\u7d4c\u904e\u3057\u307e\u3057\u305f\u306e\u3067\u3001\u8a66\u9a13\u7d42\u4e86\u3068\u306a\u308a\u307e\u3059\u3002<br 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