{"id":123,"date":"2025-02-11T07:29:00","date_gmt":"2025-02-10T22:29:00","guid":{"rendered":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=123"},"modified":"2025-10-09T10:32:28","modified_gmt":"2025-10-09T01:32:28","slug":"12-tcp","status":"publish","type":"post","link":"https:\/\/ccna-curriculum.tech-village.co.jp\/?p=123","title":{"rendered":"TCP"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">TCP\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><span class=\"swl-marker mark_yellow\">TCP\uff08Transmission Control Protocol\uff09<\/span><\/strong>\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u6a19\u6e96\u7684\u306b\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002<br>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306b\u304a\u3044\u3066\u306f\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u3067\u52d5\u4f5c\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u306eIP\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u4ee5\u4e0a\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\uff08HTTP\u3001FTP\u3001\u30e1\u30fc\u30eb\u306a\u3069\uff09\u306e\u6a4b\u6e21\u3057\u3092\u3059\u308b\u5f79\u5272\u3092\u6301\u3061\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">TCP\u306e\u7279\u5fb4<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u7279\u5fb4<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u4fe1\u983c\u6027<\/td><td>\u78ba\u8a8d\u5fdc\u7b54\u3084\u518d\u9001\u5236\u5fa1\u306b\u3088\u308a\u30c7\u30fc\u30bf\u304c\u6b63\u3057\u304f\u5c4a\u304f\u3088\u3046\u306b\u4fdd\u8a3c\u3057\u307e\u3059<\/td><\/tr><tr><td>\u9806\u5e8f\u5236\u5fa1<\/td><td>\u30c7\u30fc\u30bf\u304c\u30d0\u30e9\u30d0\u30e9\u306b\u5c4a\u3044\u3066\u3082\u6b63\u3057\u3044\u9806\u756a\u306b\u4e26\u3079\u66ff\u3048\u307e\u3059<\/td><\/tr><tr><td>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u578b<\/td><td>\u901a\u4fe1\u3092\u958b\u59cb\u3059\u308b\u524d\u306b\u901a\u4fe1\u8def\u3092\u78ba\u7acb\u3057\u307e\u3059\uff083\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\uff09<\/td><\/tr><tr><td>UDP\u3068\u306e\u9055\u3044<\/td><td>TCP\u306f\u4fe1\u983c\u6027\u91cd\u8996\u3001UDP\u306f\u901f\u5ea6\u3084\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u6027\u91cd\u8996<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u30dd\u30fc\u30c8\u756a\u53f7\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30dd\u30fc\u30c8\u756a\u53f7\u3068\u306f\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304c\u901a\u4fe1\u3092\u884c\u3046\u969b\u306b\u300c\u3069\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u6e21\u3059\u304b\u300d\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306e\u756a\u53f7\u3067\u3059\u3002IP\u30a2\u30c9\u30ec\u30b9\u3067\u300c\u3069\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304b\u300d\u3092\u6c7a\u3081\u3001\u30dd\u30fc\u30c8\u756a\u53f7\u3067\u300c\u3069\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u300d\u3092\u6c7a\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30dd\u30fc\u30c8\u756a\u53f7\u306e\u5206\u985e<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u7a2e\u985e<\/th><th>\u7bc4\u56f2<\/th><th>\u4e3b\u306a\u7528\u9014<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>\u30a6\u30a7\u30eb\u30ce\u30a6\u30f3\u30dd\u30fc\u30c8\u756a\u53f7<\/td><td>0\uff5e1023<\/td><td>\u3088\u304f\u77e5\u3089\u308c\u305f\u30a2\u30d7\u30ea\u7528\u306b\u4e88\u7d04<\/td><td>HTTP=80, HTTPS=443, SMTP=25<\/td><\/tr><tr><td>\u767b\u9332\u6e08\u307f\u30dd\u30fc\u30c8\u756a\u53f7<\/td><td>1024\uff5e49151<\/td><td>\u4e00\u822c\u30a2\u30d7\u30ea\u3084\u72ec\u81ea\u30a2\u30d7\u30ea<\/td><td>MySQL=3306, RDP=3389<\/td><\/tr><tr><td>\u30c0\u30a4\u30ca\u30df\u30c3\u30af\u30dd\u30fc\u30c8\u756a\u53f7<\/td><td>49152\uff5e65535<\/td><td>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u30a2\u30d7\u30ea\u304c\u81ea\u52d5\u5229\u7528<\/td><td>Web\u30d6\u30e9\u30a6\u30b6\u5229\u7528\u6642\u306b\u5272\u308a\u5f53\u3066<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u901a\u4fe1\u306e\u6d41\u308c\uff08Web\u30d6\u30e9\u30a6\u30b6\u306e\u4f8b\uff09<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u304cWeb\u30b5\u30fc\u30d0\u3078\u63a5\u7d9a\u8981\u6c42\u3092\u9001\u4fe1\uff08\u5b9b\u5148\u30dd\u30fc\u30c8\u756a\u53f7\uff1d80\uff09<\/li>\n\n\n\n<li>Web\u30b5\u30fc\u30d0\u304c\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u4fe1\u3057\u3001\u5fdc\u7b54\u3092\u8fd4\u3059<\/li>\n\n\n\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8PC\u5074\u306b\u306f\u52d5\u7684\u30dd\u30fc\u30c8\u756a\u53f7\uff08\u4f8b\uff1a54321\uff09\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b<\/li>\n\n\n\n<li>\u30b5\u30fc\u30d0\u306f\u305d\u306e\u756a\u53f7\u3092\u5b9b\u5148\u3068\u3057\u3066\u5fdc\u7b54\u3092\u8fd4\u3059\u305f\u3081\u3001\u30d6\u30e9\u30a6\u30b6\u3054\u3068\u306b\u6b63\u3057\u304f\u901a\u4fe1\u304c\u5c4a\u304f<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u8907\u6570\u306e\u30d6\u30e9\u30a6\u30b6\u3092\u958b\u3044\u3066\u3044\u308b\u5834\u5408\u3067\u3082\u3001\u305d\u308c\u305e\u308c\u306b\u7570\u306a\u308b\u52d5\u7684\u30dd\u30fc\u30c8\u756a\u53f7\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u305f\u3081\u901a\u4fe1\u304c\u6df7\u5728\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">TCP\u30d8\u30c3\u30c0\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP\u30bb\u30b0\u30e1\u30f3\u30c8\uff08TCP\u30d1\u30b1\u30c3\u30c8\uff09\u306f<strong><span class=\"swl-marker mark_yellow\">\u300cTCP\u30d8\u30c3\u30c0\u300d<\/span><\/strong>\u3068<strong><span class=\"swl-marker mark_yellow\">\u300cTCP\u30da\u30a4\u30ed\u30fc\u30c9\u300d<\/span><\/strong>\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>TCP\u30d8\u30c3\u30c0\uff1a\u5236\u5fa1\u60c5\u5831\u3092\u683c\u7d0d\u3059\u308b\u90e8\u5206<\/li>\n\n\n\n<li>TCP\u30da\u30a4\u30ed\u30fc\u30c9\uff1a\u5b9f\u969b\u306b\u904b\u3076\u30c7\u30fc\u30bf\u90e8\u5206\uff08\u4f8b\uff1aHTTP\u30c7\u30fc\u30bf\u306a\u3069\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">TCP\u30d8\u30c3\u30c0\u306e\u5404\u30d5\u30a3\u30fc\u30eb\u30c9<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d5\u30a3\u30fc\u30eb\u30c9<\/th><th>\u30d3\u30c3\u30c8\u6570<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u9001\u4fe1\u5143\u30dd\u30fc\u30c8\u756a\u53f7<\/td><td>16<\/td><td>\u901a\u4fe1\u3092\u958b\u59cb\u3057\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30dd\u30fc\u30c8\u756a\u53f7<\/td><\/tr><tr><td>\u5b9b\u5148\u30dd\u30fc\u30c8\u756a\u53f7<\/td><td>16<\/td><td>\u901a\u4fe1\u76f8\u624b\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u7279\u5b9a\u3059\u308b\u30dd\u30fc\u30c8\u756a\u53f7<\/td><\/tr><tr><td>\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7<\/td><td>32<\/td><td>\u30c7\u30fc\u30bf\u306e\u9806\u5e8f\u3092\u793a\u3059\u756a\u53f7<\/td><\/tr><tr><td>\u78ba\u8a8d\u5fdc\u7b54\u756a\u53f7<\/td><td>32<\/td><td>\u76f8\u624b\u304b\u3089\u53d7\u3051\u53d6\u3063\u305f\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\uff0b\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba<\/td><\/tr><tr><td>\u30c7\u30fc\u30bf\u30aa\u30d5\u30bb\u30c3\u30c8<\/td><td>4<\/td><td>TCP\u30d8\u30c3\u30c0\u306e\u9577\u3055\u3092\u793a\u3059\u5024<\/td><\/tr><tr><td>\u4e88\u7d04<\/td><td>3<\/td><td>\u5c06\u6765\u306e\u62e1\u5f35\u7528\uff08\u73fe\u5728\u306f0\uff09<\/td><\/tr><tr><td>\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30d5\u30e9\u30b0<\/td><td>9<\/td><td>TCP\u306e\u52d5\u4f5c\u3092\u5236\u5fa1\u3059\u308b\u30d3\u30c3\u30c8\uff08\u8a73\u7d30\u306f\u5f8c\u8ff0\uff09<\/td><\/tr><tr><td>\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba<\/td><td>16<\/td><td>\u53d7\u4fe1\u5074\u304c\u4e00\u5ea6\u306b\u53d7\u3051\u53d6\u308c\u308b\u30c7\u30fc\u30bf\u91cf<\/td><\/tr><tr><td>\u30c1\u30a7\u30c3\u30af\u30b5\u30e0<\/td><td>16<\/td><td>TCP\u30d8\u30c3\u30c0\u3068\u30c7\u30fc\u30bf\u306e\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af<\/td><\/tr><tr><td>\u7dca\u6025\u30dd\u30a4\u30f3\u30bf<\/td><td>16<\/td><td>URG\u30d5\u30e9\u30b0\u304c\u7acb\u3063\u3066\u3044\u308b\u5834\u5408\u306e\u307f\u6709\u52b9\u3002\u7dca\u6025\u30c7\u30fc\u30bf\u306e\u4f4d\u7f6e\u3092\u793a\u3059<\/td><\/tr><tr><td>\u30aa\u30d7\u30b7\u30e7\u30f3<\/td><td>\u53ef\u5909\u9577<\/td><td>MSS\u6c7a\u5b9a\u306a\u3069\u6027\u80fd\u5411\u4e0a\u306e\u305f\u3081\u306b\u5229\u7528\u3055\u308c\u308b<\/td><\/tr><tr><td>\u30d1\u30c7\u30a3\u30f3\u30b0<\/td><td>\u53ef\u5909\u9577<\/td><td>TCP\u30d8\u30c3\u30c0\u306e\u9577\u3055\u309232\u30d3\u30c3\u30c8\u306e\u6574\u6570\u500d\u306b\u8abf\u6574<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30d5\u30e9\u30b0\u306e\u8a73\u7d30\uff089\u30d3\u30c3\u30c8\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP\u306e\u5236\u5fa1\u3092\u884c\u3046\u305f\u3081\u306e9\u7a2e\u985e\u306e\u30d5\u30e9\u30b0\u304c\u3042\u308a\u307e\u3059\u3002\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u300c1\uff08ON\uff09\u300d\u306b\u8a2d\u5b9a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d5\u30e9\u30b0<\/th><th>\u610f\u5473<\/th><\/tr><\/thead><tbody><tr><td>NS<\/td><td>\u8f3b\u8f33\u5236\u5fa1\u4fdd\u8b77\uff08ECN-nonce\uff09<\/td><\/tr><tr><td>CWR<\/td><td>\u8f3b\u8f33\u30a6\u30a3\u30f3\u30c9\u30a6\u7e2e\u5c0f\uff08Congestion Window Reduced\uff09<\/td><\/tr><tr><td>ECE<\/td><td>ECN-Echo\uff08\u8f3b\u8f33\u901a\u77e5\u306e\u5fdc\u7b54\uff09<\/td><\/tr><tr><td>URG<\/td><td>\u7dca\u6025\u30c7\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3059<\/td><\/tr><tr><td>ACK<\/td><td>\u78ba\u8a8d\u5fdc\u7b54\u756a\u53f7\u304c\u6709\u52b9\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059<\/td><\/tr><tr><td>PSH<\/td><td>\u53d7\u4fe1\u30c7\u30fc\u30bf\u3092\u5373\u5ea7\u306b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3078\u6e21\u3059<\/td><\/tr><tr><td>RST<\/td><td>\u7570\u5e38\u6642\u306b\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092\u5f37\u5236\u5207\u65ad\u3059\u308b<\/td><\/tr><tr><td>SYN<\/td><td>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u78ba\u7acb\u306e\u8981\u6c42<\/td><\/tr><tr><td>FIN<\/td><td>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u7d42\u4e86\u306e\u8981\u6c42<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">TCP\u30d8\u30c3\u30c0\u306b\u542b\u307e\u308c\u308b\u60c5\u5831\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306aTCP\u306e\u7279\u5fb4\u7684\u306a\u4ed5\u7d44\u307f\u3067\u6d3b\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30dd\u30fc\u30c8\u756a\u53f7\u306e\u5229\u7528\uff08\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8b58\u5225\uff09<\/li>\n\n\n\n<li>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u78ba\u7acb\u30fb\u7dad\u6301\u30fb\u5207\u65ad<\/li>\n\n\n\n<li>\u9806\u5e8f\u5236\u5fa1\uff08\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\uff09<\/li>\n\n\n\n<li>\u518d\u9001\u5236\u5fa1\uff08\u78ba\u8a8d\u5fdc\u7b54\u756a\u53f7\uff09<\/li>\n\n\n\n<li>\u30a6\u30a3\u30f3\u30c9\u30a6\u5236\u5fa1\u30fb\u30d5\u30ed\u30fc\u5236\u5fa1\uff08\u901a\u4fe1\u901f\u5ea6\u3084\u91cf\u3092\u8abf\u6574\uff09<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">TCP &#8211; \u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u78ba\u7acb\uff083\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP\u306f\u300c\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u578b\u901a\u4fe1\u300d\u3067\u3042\u308a\u3001\u30c7\u30fc\u30bf\u9001\u4fe1\u524d\u306b\u5fc5\u305a\u901a\u4fe1\u8def\u3092\u78ba\u7acb\u3057\u307e\u3059\u3002<br>\u3053\u306e\u4ed5\u7d44\u307f\u3092<strong><span class=\"swl-marker mark_yellow\">3\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af<\/span><\/strong>\u3068\u547c\u3073\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30b9\u30c6\u30c3\u30d7<\/th><th>SYN<\/th><th>ACK<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u2460 \u30db\u30b9\u30c8A \u2192 \u30db\u30b9\u30c8B<\/td><td>1<\/td><td>0<\/td><td>\u63a5\u7d9a\u8981\u6c42\uff08SYN=1\uff09\u3002\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\u3092\u9001\u308b<\/td><\/tr><tr><td>\u2461 \u30db\u30b9\u30c8B \u2192 \u30db\u30b9\u30c8A<\/td><td>1<\/td><td>1<\/td><td>\u63a5\u7d9a\u8981\u6c42\uff0b\u5fdc\u7b54\uff08SYN=1, ACK=1\uff09\u3002\u76f8\u624b\u756a\u53f7\u306b+1\u3057\u305f\u5024\u3092\u8fd4\u3059<\/td><\/tr><tr><td>\u2462 \u30db\u30b9\u30c8A \u2192 \u30db\u30b9\u30c8B<\/td><td>0<\/td><td>1<\/td><td>\u5fdc\u7b54\uff08ACK=1\uff09\u3002\u3053\u308c\u3067\u63a5\u7d9a\u304c\u78ba\u7acb<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">SYN\u306f\u300c\u540c\u671f\u8981\u6c42\u300d\u3001ACK\u306f\u300c\u78ba\u8a8d\u5fdc\u7b54\u300d\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">TCP &#8211; \u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u306e\u5207\u65ad\uff084\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5207\u65ad\u306f\u4e00\u65b9\u7684\u3067\u306f\u306a\u304f\u3001\u53cc\u65b9\u304c\u3084\u308a\u53d6\u308a\u3092\u884c\u3063\u3066\u304b\u3089\u7d42\u4e86\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u30814\u56de\u306e\u3084\u308a\u3068\u308a\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30b9\u30c6\u30c3\u30d7<\/th><th>FIN<\/th><th>ACK<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>\u2467 \u30db\u30b9\u30c8B \u2192 \u30db\u30b9\u30c8A<\/td><td>1<\/td><td>0<\/td><td>\u5207\u65ad\u8981\u6c42\uff08FIN=1\uff09\u3002\u9001\u4fe1\u304c\u7d42\u308f\u3063\u305f\u3053\u3068\u3092\u901a\u77e5<\/td><\/tr><tr><td>\u2468 \u30db\u30b9\u30c8A \u2192 \u30db\u30b9\u30c8B<\/td><td>0<\/td><td>1<\/td><td>\u5fdc\u7b54\uff08ACK=1\uff09\u3002\u5207\u65ad\u8981\u6c42\u3092\u53d7\u3051\u5165\u308c\u308b<\/td><\/tr><tr><td>\u2469 \u30db\u30b9\u30c8A \u2192 \u30db\u30b9\u30c8B<\/td><td>1<\/td><td>0<\/td><td>\u81ea\u5206\u3082\u5207\u65ad\u8981\u6c42\uff08FIN=1\uff09\u3092\u9001\u308b<\/td><\/tr><tr><td>\u246a \u30db\u30b9\u30c8B \u2192 \u30db\u30b9\u30c8A<\/td><td>0<\/td><td>1<\/td><td>\u5fdc\u7b54\uff08ACK=1\uff09\u3002\u901a\u4fe1\u7d42\u4e86<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">TCP &#8211; \u30c7\u30fc\u30bf\u9001\u53d7\u4fe1\u306e\u6d41\u308c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u78ba\u7acb\u5f8c\u3001\u30c7\u30fc\u30bf\u306f\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\u3068\u78ba\u8a8d\u5fdc\u7b54\u756a\u53f7\u306b\u3088\u3063\u3066\u7ba1\u7406\u3055\u308c\u307e\u3059\u3002<br>\u4f8b\u3048\u3070\u3001\u30db\u30b9\u30c8A\u304c100\u30d0\u30a4\u30c8\u9001\u308b\u3068\u3001\u30db\u30b9\u30c8B\u306f\u300c\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\uff0b100\u300d\u306e\u78ba\u8a8d\u5fdc\u7b54\u3092\u8fd4\u3057\u3001\u6b21\u306e\u30c7\u30fc\u30bf\u3092\u6b63\u3057\u304f\u53d7\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">TCP &#8211; MSS\uff08Maximum Segment Size\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">3\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u3067\u4ea4\u63db\u3055\u308c\u308b\u60c5\u5831\u306e\u3072\u3068\u3064\u306bMSS\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f1\u3064\u306eTCP\u30d1\u30b1\u30c3\u30c8\u3067\u9001\u308c\u308b\u30c7\u30fc\u30bf\u306e\u6700\u5927\u5024\u3092\u8868\u3057\u307e\u3059\u3002\u30a4\u30fc\u30b5\u30cd\u30c3\u30c8\u3067\u306f\u901a\u5e381460\u30d0\u30a4\u30c8\u304cMSS\u3068\u306a\u308a\u307e\u3059\u3002\u30db\u30b9\u30c8A\u304c1460\u3001\u30db\u30b9\u30c8B\u304c2000\u3092\u901a\u77e5\u3057\u305f\u5834\u5408\u3001\u5c0f\u3055\u3044\u65b9\u306e1460\u304c\u63a1\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3068\u3057\u306614600\u30d0\u30a4\u30c8\u3092\u9001\u4fe1\u3059\u308b\u5834\u5408\u300110\u500b\u306eTCP\u30d1\u30b1\u30c3\u30c8\u306b\u5206\u5272\u3057\u3066\u9001\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">TCP\u306e\u72b6\u614b\u9077\u79fb\u3068\u306f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP\u306f\u3001\u901a\u4fe1\u306e\u958b\u59cb\uff08\u63a5\u7d9a\u78ba\u7acb\uff09\u3001\u901a\u4fe1\u4e2d\uff08\u30c7\u30fc\u30bf\u8ee2\u9001\uff09\u3001\u901a\u4fe1\u306e\u7d42\u4e86\uff08\u5207\u65ad\uff09\u306b\u304a\u3044\u3066<span class=\"swl-marker mark_yellow\"><strong>\u300c\u72b6\u614b\uff08\u30b9\u30c6\u30fc\u30c8\uff09\u300d<\/strong><\/span>\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<br>\u3053\u306e\u72b6\u614b\u306f\u300c3\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u300d\u300c4\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\u300d\u306e\u3084\u308a\u3068\u308a\u306e\u4e2d\u3067\u5909\u5316\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3b\u306a\u72b6\u614b\uff08\u30b9\u30c6\u30fc\u30c8\uff09\u306e\u8aac\u660e<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30b9\u30c6\u30fc\u30c8<\/th><th>\u8aac\u660e<\/th><\/tr><\/thead><tbody><tr><td>CLOSED<\/td><td>\u672a\u4f7f\u7528\u72b6\u614b\u306eTCP\u30dd\u30fc\u30c8\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u6700\u521d\u306b\u30a2\u30af\u30b7\u30e7\u30f3\u3092\u8d77\u3053\u3059\u524d\u306e\u72b6\u614b<\/td><\/tr><tr><td>LISTEN<\/td><td>\u5f85\u3061\u53d7\u3051\u72b6\u614b\u3002\u30b5\u30fc\u30d0\u304c\u63a5\u7d9a\u8981\u6c42\uff08SYN\uff09\u3092\u5f85\u6a5f\u3057\u3066\u3044\u308b\u72b6\u614b<\/td><\/tr><tr><td>SYN_SENT<\/td><td>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cSYN\u3092\u9001\u4fe1\u3057\u305f\u304c\u3001ACK\u3092\u307e\u3060\u53d7\u4fe1\u3057\u3066\u3044\u306a\u3044\u72b6\u614b<\/td><\/tr><tr><td>SYN_RECEIVED<\/td><td>\u30b5\u30fc\u30d0\u304cSYN\u3092\u53d7\u4fe1\u3057\u305f\u304c\u3001ACK\u3092\u307e\u3060\u53d7\u4fe1\u3057\u3066\u3044\u306a\u3044\u72b6\u614b<\/td><\/tr><tr><td>ESTABLISHED<\/td><td>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u304c\u78ba\u7acb\u3057\u3001\u5b9f\u969b\u306b\u901a\u4fe1\u3057\u3066\u3044\u308b\u72b6\u614b<\/td><\/tr><tr><td>FIN_WAIT<\/td><td>\u81ea\u5206\u304b\u3089\u63a5\u7d9a\u7d42\u4e86\u3092\u958b\u59cb\u3057\u3001FIN\u3092\u9001\u3063\u305f\u5f8c\u306e\u72b6\u614b<\/td><\/tr><tr><td>CLOSE_WAIT<\/td><td>\u76f8\u624b\u304b\u3089FIN\u3092\u53d7\u3051\u53d6\u308a\u3001\u307e\u3060\u81ea\u5206\u306e\u7d42\u4e86\u51e6\u7406\u3092\u3057\u3066\u3044\u306a\u3044\u72b6\u614b<\/td><\/tr><tr><td>LAST_ACK<\/td><td>\u81ea\u5206\u3082FIN\u3092\u9001\u4fe1\u3057\u3066\u3001\u6700\u5f8c\u306eACK\u3092\u5f85\u3063\u3066\u3044\u308b\u72b6\u614b<\/td><\/tr><tr><td>TIME_WAIT<\/td><td>\u76f8\u624b\u304b\u3089\u306e\u6700\u5f8c\u306e\u30d1\u30b1\u30c3\u30c8\u3092\u78ba\u8a8d\u3057\u3001\u4e00\u5b9a\u6642\u9593\u5f85\u6a5f\u3057\u3066\u304b\u3089CLOSED\u306b\u623b\u308b\u72b6\u614b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u72b6\u614b\u9077\u79fb\u306e\u6d41\u308c\uff08\u30a4\u30e1\u30fc\u30b8\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u901a\u4fe1\u78ba\u7acb\uff083\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\uff09<br>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\uff1aCLOSED \u2192 SYN_SENT \u2192 ESTABLISHED<br>\u30b5\u30fc\u30d0\uff1aLISTEN \u2192 SYN_RECEIVED \u2192 ESTABLISHED<\/li>\n\n\n\n<li>\u901a\u4fe1\u7d42\u4e86\uff084\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af\uff09<br>\u30a2\u30af\u30c6\u30a3\u30d6\u5074\uff08\u7d42\u4e86\u3092\u958b\u59cb\u3057\u305f\u5074\uff09\uff1aESTABLISHED \u2192 FIN_WAIT \u2192 TIME_WAIT \u2192 CLOSED<br>\u30d1\u30c3\u30b7\u30d6\u5074\uff08\u7d42\u4e86\u8981\u6c42\u3092\u53d7\u3051\u305f\u5074\uff09\uff1aESTABLISHED \u2192 CLOSE_WAIT \u2192 LAST_ACK \u2192 CLOSED<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b9f\u969b\u306e\u78ba\u8a8d\u65b9\u6cd5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d1\u30bd\u30b3\u30f3\u306e\u30b3\u30de\u30f3\u30c9\u30d7\u30ed\u30f3\u30d7\u30c8\u3084\u30bf\u30fc\u30df\u30ca\u30eb\u3067\u3001\u73fe\u5728\u306eTCP\u63a5\u7d9a\u304c\u3069\u306e\u72b6\u614b\u306b\u3042\u308b\u304b\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Windows: <code>netstat<\/code><\/li>\n\n\n\n<li>Linux: <code>netstat -at<\/code><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u306b\u3088\u308a\u3001\u4f7f\u7528\u4e2d\u306eTCP\u30dd\u30fc\u30c8\u3068\u72b6\u614b\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">TCP &#8211; \u4fe1\u983c\u6027\u306e\u78ba\u4fdd\uff08\u9806\u5e8f\u5236\u5fa1\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP\u306f\u9001\u4fe1\u3059\u308b\u3059\u3079\u3066\u306e\u30d1\u30b1\u30c3\u30c8\u306b <strong>\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7<\/strong> \u3092\u4ed8\u4e0e\u3057\u307e\u3059\u3002<br>\u3053\u308c\u306b\u3088\u308a\u3001\u53d7\u4fe1\u5074\u306f\u300c\u53d7\u3051\u53d6\u3063\u305f\u30c7\u30fc\u30bf\u304c\u5168\u4f53\u306e\u3069\u306e\u4f4d\u7f6e\u306b\u3042\u308b\u304b\u300d\u3092\u5224\u65ad\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u3048\u3070\u3001\u30db\u30b9\u30c8A\u304b\u3089\u30db\u30b9\u30c8B\u306b2600\u30d0\u30a4\u30c8\u306e\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u5834\u5408\u3001MSS\uff08\u6700\u5927\u30bb\u30b0\u30e1\u30f3\u30c8\u30b5\u30a4\u30ba\uff09\u304c1300\u30d0\u30a4\u30c8\u3060\u3068\u3001\u30c7\u30fc\u30bf\u306f\u6b21\u306e\u3088\u3046\u306b\u5206\u5272\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u30d1\u30b1\u30c3\u30c8<\/th><th>\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba<\/th><th>\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7<\/th><\/tr><\/thead><tbody><tr><td>1\u756a\u76ee<\/td><td>1300\u30d0\u30a4\u30c8<\/td><td>1\uff5e1300<\/td><\/tr><tr><td>2\u756a\u76ee<\/td><td>1300\u30d0\u30a4\u30c8<\/td><td>1301\uff5e2600<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u30db\u30b9\u30c8B\u306f\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\u3092\u57fa\u306b\u30c7\u30fc\u30bf\u3092\u4e26\u3079\u76f4\u3059\u305f\u3081\u3001\u9806\u756a\u901a\u308a\u306b\u5c4a\u304b\u306a\u304f\u3066\u3082\u5143\u306e2600\u30d0\u30a4\u30c8\u306b\u6b63\u3057\u304f\u5fa9\u5143\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">TCP &#8211; \u4fe1\u983c\u6027\u306e\u78ba\u4fdd\uff08\u518d\u9001\u5236\u5fa1\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP\u3067\u306f\u3001\u9001\u4fe1\u3057\u305f\u30c7\u30fc\u30bf\u304c\u78ba\u5b9f\u306b\u5c4a\u3044\u305f\u3053\u3068\u3092 <strong>ACK\uff08\u78ba\u8a8d\u5fdc\u7b54\uff09<\/strong> \u3067\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30db\u30b9\u30c8A\u304c\u30db\u30b9\u30c8B\u3078\u30c7\u30fc\u30bf\u3092\u9001\u4fe1<\/li>\n\n\n\n<li>\u30db\u30b9\u30c8B\u304c\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308b\u3068ACK\u756a\u53f7\u3092\u8fd4\u3059<\/li>\n\n\n\n<li>ACK\u304c\u8fd4\u3089\u306a\u3051\u308c\u3070\u3001\u9001\u4fe1\u5074\uff08\u30db\u30b9\u30c8A\uff09\u306f\u300c\u9014\u4e2d\u3067\u30d1\u30b1\u30c3\u30c8\u304c\u5931\u308f\u308c\u305f\u300d\u3068\u5224\u65ad\u3057\u3001\u30c7\u30fc\u30bf\u3092\u518d\u9001<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u4ed5\u7d44\u307f\u306b\u3088\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u304c\u4e0d\u5b89\u5b9a\u3067\u3082\u30c7\u30fc\u30bf\u304c\u6b20\u3051\u308b\u3053\u3068\u306a\u304f\u9001\u4fe1\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u521d\u5fc3\u8005\u5411\u3051\u30a4\u30e1\u30fc\u30b8<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9806\u5e8f\u5236\u5fa1\uff1a\u30c7\u30fc\u30bf\u306b\u300c\u901a\u3057\u756a\u53f7\u300d\u3092\u3064\u3051\u308b\u306e\u3067\u3001\u30b8\u30b0\u30bd\u30fc\u30d1\u30ba\u30eb\u306e\u30d4\u30fc\u30b9\u306e\u3088\u3046\u306b\u5143\u901a\u308a\u306b\u4e26\u3079\u3089\u308c\u308b\u3002<\/li>\n\n\n\n<li>\u518d\u9001\u5236\u5fa1\uff1a\u300c\u5c4a\u3044\u305f\u3088\u300d\u306e\u8fd4\u4e8b\u304c\u6765\u306a\u3051\u308c\u3070\u3001\u9001\u308a\u76f4\u3059\u3002\u5b85\u914d\u4fbf\u3067\u300c\u914d\u9054\u5b8c\u4e86\u901a\u77e5\u300d\u304c\u5c4a\u304b\u306a\u3044\u3068\u518d\u914d\u9001\u3059\u308b\u30a4\u30e1\u30fc\u30b8\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">TCP &#8211; \u901a\u4fe1\u52b9\u7387\u306e\u5411\u4e0a\uff08\u30a6\u30a3\u30f3\u30c9\u30a6\u5236\u5fa1\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">TCP\u3067\u306f\u3001ACK\u306b\u3088\u308b\u78ba\u8a8d\u5fdc\u7b54\u306b\u3088\u3063\u3066\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3057\u3066\u3044\u307e\u3059\u304c\u30011\u30d1\u30b1\u30c3\u30c8\u3054\u3068\u306bACK\u3092\u5f85\u3063\u3066\u3044\u3066\u306f\u901a\u4fe1\u901f\u5ea6\u304c\u9045\u304f\u306a\u308a\u307e\u3059\u3002<br>\u305d\u3053\u3067<strong><span class=\"swl-marker mark_yellow\">\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u300d<\/span><\/strong>\u3068\u3044\u3046\u4ed5\u7d44\u307f\u3092\u5229\u7528\u3057\u3001\u307e\u3068\u3081\u3066\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3068\u306f\u3001<strong><span class=\"swl-marker mark_yellow\">\u4e00\u5ea6\u306bACK\u3092\u5f85\u305f\u305a\u306b\u9001\u308c\u308b\u30c7\u30fc\u30bf\u91cf\u306e\u3053\u3068<\/span><\/strong>\u3067\u3059\u3002<br>\u4f8b\u3048\u3070\u30013900\u30d0\u30a4\u30c8\u306e\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3059\u308b\u5834\u5408\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u304c3900\u306a\u3089ACK\u3092\u5f85\u305f\u305a\u306b3900\u30d0\u30a4\u30c8\u3092\u4e00\u5ea6\u306b\u9001\u4fe1\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3089\u306b\u52b9\u7387\u3092\u9ad8\u3081\u308b\u305f\u3081\u306b<strong><span class=\"swl-marker mark_yellow\">\u300c\u30b9\u30e9\u30a4\u30c7\u30a3\u30f3\u30b0\u30a6\u30a3\u30f3\u30c9\u30a6\u300d<\/span><\/strong>\u3068\u3044\u3046\u4ed5\u7d44\u307f\u304c\u4f7f\u308f\u308c\u307e\u3059\u3002<br>\u53d7\u4fe1\u5074\u304c\u30c7\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u3063\u3066ACK\u3092\u8fd4\u3059\u3068\u3001\u305d\u306e\u5206\u3060\u3051\u9001\u4fe1\u53ef\u80fd\u306a\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u524d\u306b\u30b9\u30e9\u30a4\u30c9\u3057\u307e\u3059\u3002<br>\u9001\u4fe1\u5074\u306f\u305d\u306eACK\u3092\u5f85\u3064\u3053\u3068\u306a\u304f\u3001\u9023\u7d9a\u3057\u3066\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u5206\u306e\u30c7\u30fc\u30bf\u3092\u9001\u308a\u7d9a\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br>\u3053\u308c\u306b\u3088\u308a\u3001\u5f85\u3061\u6642\u9593\u3092\u6e1b\u3089\u3057\u3066\u9ad8\u901f\u306a\u901a\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">TCP &#8211; \u901a\u4fe1\u52b9\u7387\u306e\u5411\u4e0a\uff08\u30d5\u30ed\u30fc\u5236\u5fa1\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d5\u30ed\u30fc\u5236\u5fa1\u306f\u3001\u53d7\u4fe1\u5074\u306e\u51e6\u7406\u80fd\u529b\u306b\u5fdc\u3058\u3066\u9001\u4fe1\u91cf\u3092\u8abf\u6574\u3059\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u6570\u306e\u9001\u4fe1\u5074\u30db\u30b9\u30c8\u304c\u540c\u6642\u306b\u30c7\u30fc\u30bf\u3092\u9001\u308b\u3068\u3001\u53d7\u4fe1\u5074\u306f\u51e6\u7406\u3057\u304d\u308c\u306a\u304f\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<br>\u3053\u306e\u5834\u5408\u3001\u53d7\u4fe1\u5074\u306f\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3092<strong>\u5c0f\u3055\u304f<\/strong>\u3057\u3066\u901a\u77e5\u3057\u3001\u9001\u4fe1\u5074\u306b\u9001\u4fe1\u91cf\u3092\u6e1b\u3089\u3059\u3088\u3046\u4f1d\u3048\u307e\u3059\u3002<br>\u53d7\u4fe1\u5074\u304c\u518d\u3073\u51e6\u7406\u53ef\u80fd\u306b\u306a\u308c\u3070\u3001\u30a6\u30a3\u30f3\u30c9\u30a6\u30b5\u30a4\u30ba\u3092<strong>\u5927\u304d\u304f<\/strong>\u3057\u3066\u901a\u77e5\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30a6\u30a3\u30f3\u30c9\u30a6\u5236\u5fa1\u306f\u52b9\u7387\u3092\u9ad8\u3081\u308b\u4ed5\u7d44\u307f\u3067\u3042\u308a\u3001\u30d5\u30ed\u30fc\u5236\u5fa1\u306f\u53d7\u4fe1\u5074\u304c\u904e\u8ca0\u8377\u306b\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u5b88\u308b\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u521d\u5fc3\u8005\u5411\u3051\u30a4\u30e1\u30fc\u30b8<br>\u30a6\u30a3\u30f3\u30c9\u30a6\u5236\u5fa1\uff1d\u300c\u307e\u3068\u3081\u3066\u8377\u7269\u3092\u9001\u308b\u8a31\u53ef\u3002\u5c4a\u3044\u305f\u5206\u3060\u3051\u7a93\u3092\u958b\u3051\u3066\u6b21\u3092\u9001\u308c\u308b\u300d<br>\u30d5\u30ed\u30fc\u5236\u5fa1\uff1d\u300c\u53d7\u3051\u53d6\u308b\u5074\u306e\u4f59\u88d5\u306b\u5408\u308f\u305b\u3066\u8377\u7269\u306e\u91cf\u3092\u8abf\u6574\u3059\u308b\u300d<\/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\/02\/TCP.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"TCP\u306e\u57cb\u3081\u8fbc\u307f\u3002\"><\/object><a id=\"wp-block-file--media-bc35a8df-4da7-4fd2-8733-afddf442a496\" href=\"https:\/\/ccna-curriculum.tech-village.co.jp\/wp-content\/uploads\/2025\/02\/TCP.pdf\">TCP<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>TCP\u3068\u306f TCP\uff08Transmission Control Protocol\uff09\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u6a19\u6e96\u7684\u306b\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u901a\u4fe1\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306b\u304a\u3044\u3066\u306f\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u3067\u52d5\u4f5c\u3057\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u306eIP\u3068\u30a2\u30d7 [&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":[11],"tags":[],"class_list":["post-123","post","type-post","status-publish","format-standard","hentry","category-network"],"_links":{"self":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/123","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=123"}],"version-history":[{"count":9,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/123\/revisions"}],"predecessor-version":[{"id":595,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/123\/revisions\/595"}],"wp:attachment":[{"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=123"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=123"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ccna-curriculum.tech-village.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}