{"id":7096,"date":"2025-10-12T08:30:23","date_gmt":"2025-10-11T23:30:23","guid":{"rendered":"https:\/\/blog.since2020.jp\/?p=7096"},"modified":"2025-09-30T16:08:14","modified_gmt":"2025-09-30T07:08:14","slug":"transport-layer_glossary","status":"publish","type":"post","link":"https:\/\/since2020.jp\/media\/transport-layer_glossary\/","title":{"rendered":"\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u3092\u5fb9\u5e95\u89e3\u8aac\uff1a\u4ed5\u7d44\u307f\u304b\u3089\u6700\u65b0\u52d5\u5411\u307e\u3067\u308f\u304b\u308b\u5b8c\u5168\u30ac\u30a4\u30c9"},"content":{"rendered":"\n<p>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u57fa\u672c\u6982\u5ff5\u304b\u3089TCP\/UDP\u306e\u9055\u3044\u3001\u5b9f\u969b\u306e\u5fdc\u7528\u4f8b\u3001\u30e1\u30ea\u30c3\u30c8\u30fb\u30c7\u30e1\u30ea\u30c3\u30c8\u3001\u3055\u3089\u306bQUIC\u30845G\u30fbIoT\u6642\u4ee3\u306e\u5c55\u671b\u307e\u3067\u3092\u7db2\u7f85\u3002\u521d\u5fc3\u8005\u3067\u3082\u7406\u89e3\u3057\u3084\u3059\u304f\u3001\u6280\u8853\u8005\u306b\u3082\u5f79\u7acb\u3064\u6700\u65b0\u77e5\u8b58\u3092\u6df1\u5800\u308a\u3057\u307e\u3059\u3002<\/p>\n\n\n<h2>\u306f\u3058\u3081\u306b<\/h2>\n<b>\u306a\u305c\u300c\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u300d\u304c\u4eca\u3082\u6ce8\u76ee\u3055\u308c\u308b\u306e\u304b<\/b>\r\n<p>\u79c1\u305f\u3061\u304c\u666e\u6bb5\u5229\u7528\u3057\u3066\u3044\u308b\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u88cf\u5074\u3067\u306f\u3001\u30c7\u30fc\u30bf\u304c\u5206\u5272\u3055\u308c\u3001\u9001\u4fe1\u3055\u308c\u3001\u518d\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u4e2d\u3067\u300c\u78ba\u5b9f\u306b\u30c7\u30fc\u30bf\u3092\u5c4a\u3051\u308b\u300d\u5f79\u5272\u3092\u62c5\u3063\u3066\u3044\u308b\u306e\u304c<strong>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64<\/strong>\u3067\u3059\u3002<\/p>\r\n<p>\u52d5\u753b\u914d\u4fe1\u306e\u30b9\u30e0\u30fc\u30ba\u306a\u518d\u751f\u3001EC\u30b5\u30a4\u30c8\u3067\u306e\u5b89\u5168\u306a\u8cfc\u5165\u3001\u30aa\u30f3\u30e9\u30a4\u30f3\u4f1a\u8b70\u306e\u9045\u5ef6\u306e\u5c11\u306a\u3055\u2014\u2014\u3053\u308c\u3089\u306f\u3059\u3079\u3066\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u304c\u652f\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\r\n<p>\u672c\u8a18\u4e8b\u3067\u306f\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u57fa\u672c\u7684\u306a\u4ed5\u7d44\u307f\u304b\u3089\u5b9f\u969b\u306e\u6d3b\u7528\u4e8b\u4f8b\u3001\u305d\u3057\u3066\u4eca\u5f8c\u306e\u9032\u5316\u307e\u3067\u3092\u4f53\u7cfb\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: a496bad6-ed69-4dd3-81ce-bd1b1cbcad25 --><\/p>\n\n<h2>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u57fa\u672c\u6982\u5ff5<\/h2>\n<b>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u3068\u306f\uff1f<\/b>\r\n<p>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306f\u3001<strong>OSI\u53c2\u7167\u30e2\u30c7\u30eb\u306e\u7b2c4\u5c64<\/strong>\u306b\u4f4d\u7f6e\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u9593\u3067\u306e\u901a\u4fe1\u3092\u6b63\u78ba\u304b\u3064\u52b9\u7387\u7684\u306b\u5b9f\u73fe\u3059\u308b\u5c64\u3067\u3059\u3002\u4e0a\u4f4d\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5c64\u3068\u4e0b\u4f4d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u5c64\u3092\u3064\u306a\u3050\u300c\u6a4b\u6e21\u3057\u300d\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\r\n<p>\u7279\u5fb4\u7684\u306a\u6a5f\u80fd\u3068\u3057\u3066\u306f\u4ee5\u4e0b\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\r\n<ul>\r\n\t<li>\u30c7\u30fc\u30bf\u306e\u5206\u5272\uff08\u30bb\u30b0\u30e1\u30f3\u30c8\u5316\uff09\u3068\u518d\u69cb\u6210<\/li>\r\n\t<li>\u901a\u4fe1\u306e\u4fe1\u983c\u6027\u4fdd\u8a3c\uff08\u30a8\u30e9\u30fc\u691c\u51fa\u30fb\u518d\u9001\u5236\u5fa1\uff09<\/li>\r\n\t<li>\u30dd\u30fc\u30c8\u756a\u53f7\u3092\u7528\u3044\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8b58\u5225<\/li>\r\n<\/ul>\r\n<b>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u91cd\u8981\u6027<\/b>\r\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u7d30\u304b\u306a\u51e6\u7406\u306b\u7169\u308f\u3055\u308c\u308b\u3053\u3068\u306a\u304f\u958b\u767a\u3067\u304d\u308b\u306e\u306f\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u304c\u901a\u4fe1\u306e\u4fe1\u983c\u6027\u3084\u5236\u5fa1\u3092\u80a9\u4ee3\u308f\u308a\u3057\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002\u3082\u3057\u3053\u306e\u5c64\u304c\u306a\u3051\u308c\u3070\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u81ea\u524d\u3067\u518d\u9001\u5236\u5fa1\u3084\u8aa4\u308a\u691c\u77e5\u3092\u884c\u308f\u306d\u3070\u306a\u3089\u305a\u3001\u30b7\u30b9\u30c6\u30e0\u958b\u767a\u306f\u683c\u6bb5\u306b\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: aa537be3-687e-4ecb-8a2f-a4c1a1d4d722 --><\/p>\n\n<h2>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u30d7\u30ed\u30bb\u30b9\u3068\u624b\u6cd5<\/h2>\n<b>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u30d7\u30ed\u30bb\u30b9<\/b>\r\n<ol>\r\n\t<li><strong>\u30c7\u30fc\u30bf\u5206\u5272<\/strong> \u2013 \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304b\u3089\u53d7\u3051\u53d6\u3063\u305f\u30c7\u30fc\u30bf\u3092\u5c0f\u3055\u306a\u30bb\u30b0\u30e1\u30f3\u30c8\u306b\u5206\u3051\u308b<\/li>\r\n\t<li><strong>\u30a8\u30e9\u30fc\u5236\u5fa1<\/strong> \u2013 \u901a\u4fe1\u4e2d\u306e\u8aa4\u308a\u3084\u30d1\u30b1\u30c3\u30c8\u640d\u5931\u3092\u691c\u51fa<\/li>\r\n\t<li><strong>\u518d\u9001\u5236\u5fa1<\/strong> \u2013 \u6b20\u640d\u304c\u3042\u308c\u3070\u81ea\u52d5\u7684\u306b\u518d\u9001<\/li>\r\n\t<li><strong>\u53d7\u4fe1\u5074\u3067\u306e\u518d\u69cb\u7bc9<\/strong> \u2013 \u30bb\u30b0\u30e1\u30f3\u30c8\u3092\u6b63\u3057\u3044\u9806\u5e8f\u3067\u4e26\u3079\u76f4\u3057\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u6e21\u3059<\/li>\r\n<\/ol>\r\n<b>TCP\uff08Transmission Control Protocol\uff09<\/b>\r\n<p>TCP\u306f<strong>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u578b<\/strong>\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3001\u4fe1\u983c\u6027\u3092\u91cd\u8996\u3057\u3066\u3044\u307e\u3059\u3002\u4e3b\u306a\u7279\u5fb4\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\r\n<ul>\r\n\t<li><strong>3\u30a6\u30a7\u30a4\u30cf\u30f3\u30c9\u30b7\u30a7\u30a4\u30af<\/strong>\u306b\u3088\u308b\u63a5\u7d9a\u78ba\u7acb<\/li>\r\n\t<li>\u30d5\u30ed\u30fc\u5236\u5fa1\u30fb\u8f3b\u8f33\u5236\u5fa1\u306b\u3088\u308b\u901a\u4fe1\u306e\u5b89\u5b9a\u5316<\/li>\r\n\t<li>\u518d\u9001\u5236\u5fa1\u306b\u3088\u308b\u30c7\u30fc\u30bf\u5b8c\u5168\u6027\u306e\u4fdd\u8a3c<\/li>\r\n<\/ul>\r\n<p>\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b8\u30f3\u30b0\u3001\u30e1\u30fc\u30eb\u9001\u53d7\u4fe1\u3001\u30d5\u30a1\u30a4\u30eb\u8ee2\u9001\u306a\u3069\u3001\u6b63\u78ba\u6027\u304c\u91cd\u8996\u3055\u308c\u308b\u901a\u4fe1\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\r\n<b>UDP\uff08User Datagram Protocol\uff09<\/b>\r\n<p>UDP\u306f<strong>\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30ec\u30b9\u578b<\/strong>\u3067\u3001\u4fe1\u983c\u6027\u3088\u308a\u3082\u30b9\u30d4\u30fc\u30c9\u3092\u512a\u5148\u3057\u307e\u3059\u3002<\/p>\r\n<ul>\r\n\t<li>\u30a8\u30e9\u30fc\u691c\u51fa\u306f\u884c\u3046\u304c\u518d\u9001\u306f\u3057\u306a\u3044<\/li>\r\n\t<li>\u8efd\u91cf\u3067\u9045\u5ef6\u304c\u5c11\u306a\u3044<\/li>\r\n\t<li>\u5c11\u3057\u306e\u30c7\u30fc\u30bf\u6b20\u640d\u3088\u308a\u901f\u5ea6\u3092\u512a\u5148\u3059\u308b\u7528\u9014\u306b\u6700\u9069<\/li>\r\n<\/ul>\r\n<p>\u30aa\u30f3\u30e9\u30a4\u30f3\u30b2\u30fc\u30e0\u3001VoIP\u901a\u8a71\u3001\u52d5\u753b\u914d\u4fe1\u306a\u3069\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u6027\u304c\u91cd\u8981\u306a\u5206\u91ce\u3067\u6d3b\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: 56cfd988-cf46-4169-81c8-580d97e0010f --><\/p>\n\n<h2>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u5fdc\u7528\u5206\u91ce<\/h2>\n<b>\u30a6\u30a7\u30d6\u901a\u4fe1\uff08HTTP\/HTTPS\uff09<\/b>\r\n<p>\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3092\u95b2\u89a7\u3059\u308b\u3068\u304d\u3001\u30d6\u30e9\u30a6\u30b6\u3068\u30b5\u30fc\u30d0\u30fc\u306fTCP\u3092\u4ecb\u3057\u3066HTTP\/HTTPS\u901a\u4fe1\u3092\u884c\u3044\u307e\u3059\u3002TLS\u6697\u53f7\u5316\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30bb\u30ad\u30e5\u30a2\u306a\u30c7\u30fc\u30bf\u9001\u53d7\u4fe1\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\r\n<b>\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u30b5\u30fc\u30d3\u30b9<\/b>\r\n<p>YouTube\u3084Netflix\u306a\u3069\u306e\u52d5\u753b\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u306f\u3001\u4e3b\u306bUDP\u3092\u5229\u7528\u3057\u3066\u30b9\u30e0\u30fc\u30ba\u306a\u518d\u751f\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001Google\u304c\u958b\u767a\u3057\u305f<strong>QUIC<\/strong>\u30d7\u30ed\u30c8\u30b3\u30eb\u306f\u3001UDP\u3092\u30d9\u30fc\u30b9\u306b\u4fe1\u983c\u6027\u3068\u901f\u5ea6\u3092\u4e21\u7acb\u3057\u3001\u3059\u3067\u306bChrome\u3084YouTube\u3067\u63a1\u7528\u304c\u9032\u3093\u3067\u3044\u307e\u3059\u3002<\/p>\r\n<b>\u30aa\u30f3\u30e9\u30a4\u30f3\u30b2\u30fc\u30e0\u30fbVoIP<\/b>\r\n<p>\u30aa\u30f3\u30e9\u30a4\u30f3\u30b2\u30fc\u30e0\u3084\u97f3\u58f0\u901a\u8a71\uff08VoIP\uff09\u3067\u306f\u3001\u30c7\u30fc\u30bf\u6b20\u640d\u3088\u308a\u3082<strong>\u9045\u5ef6\u306e\u5c11\u306a\u3055<\/strong>\u304c\u91cd\u8981\u3067\u3059\u3002\u305d\u306e\u305f\u3081UDP\u304c\u591a\u7528\u3055\u308c\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u6027\u306e\u9ad8\u3044\u30b3\u30df\u30e5\u30cb\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u652f\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\r\n<p><!-- notionvc: 157b149c-c378-4729-b9c4-f560ab1a6a3e --><\/p>\n\n<h2>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u30e1\u30ea\u30c3\u30c8\u3068\u30c7\u30e1\u30ea\u30c3\u30c8<\/h2>\n<b>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u30e1\u30ea\u30c3\u30c8<\/b>\r\n<ol>\r\n\t<li><strong>\u4fe1\u983c\u6027\u306e\u78ba\u4fdd<\/strong> \u2013 TCP\u306b\u3088\u308b\u30c7\u30fc\u30bf\u5b8c\u5168\u6027\u306e\u4fdd\u8a3c<\/li>\r\n\t<li><strong>\u591a\u7528\u9014\u5bfe\u5fdc<\/strong> \u2013 TCP\u3068UDP\u3067\u5e45\u5e83\u3044\u901a\u4fe1\u30cb\u30fc\u30ba\u306b\u5bfe\u5fdc<\/li>\r\n\t<li><strong>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8ca0\u62c5\u306e\u8efd\u6e1b<\/strong> \u2013 \u30a8\u30e9\u30fc\u51e6\u7406\u3084\u518d\u9001\u3092\u81ea\u52d5\u5316<\/li>\r\n<\/ol>\r\n<b>\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u5c64\u306e\u30c7\u30e1\u30ea\u30c3\u30c8<\/b>\r\n<ol>\r\n\t<li><strong>TCP\u306e\u9045\u5ef6<\/strong> \u2013 \u4fe1\u983c\u6027\u306e\u305f\u3081\u306b\u901f\u5ea6\u304c\u72a0\u7272\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308b<\/li>\r\n\t<li><strong>UDP\u306e\u4fe1\u983c\u6027\u4e0d\u8db3<\/strong> \u2013 \u518d\u9001\u5236\u5fa1\u304c\u306a\u3044\u305f\u3081\u91cd\u8981\u30c7\u30fc\u30bf\u306b\u306f\u4e0d\u5411\u304d<\/li>\r\n\t<li><strong>\u8907\u96d1\u306a\u5236\u5fa1<\/strong> \u2013 \u30d5\u30ed\u30fc\u5236\u5fa1\u3084\u8f3b\u8f33\u5236\u5fa1\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u3092\u96e3\u3057\u304f\u3059\u308b<\/li>\r\n<\/ol>\r\n<p><!-- notionvc: b451dc01-a2cc-40be-a563-2069c779a249 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