{"id":3482,"date":"2015-09-25T19:37:46","date_gmt":"2015-09-25T10:37:46","guid":{"rendered":"http:\/\/www.yamanaka.ics.keio.ac.jp\/?page_id=3482"},"modified":"2018-10-11T13:57:16","modified_gmt":"2018-10-11T04:57:16","slug":"contents-delivery-network","status":"publish","type":"page","link":"https:\/\/www.yamanaka.ics.keio.ac.jp\/?page_id=3482","title":{"rendered":"\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u4fe1\u7db2"},"content":{"rendered":"<p>\u8fd1\u5e74\uff0cWeb\u30b5\u30fc\u30d3\u30b9\u306e\u6025\u901f\u306a\u666e\u53ca\u304a\u3088\u3073\u30a2\u30af\u30bb\u30b9\u7db2\u306e\u9ad8\u901f\u5316\u306b\u4f34\u3044\uff0c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4f1d\u9001\u3055\u308c\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u3057\u3066\uff0c\u30ea\u30c3\u30c1\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u547c\u3070\u308c\u308b\u6620\u753b\u3084\u97f3\u697d\u306a\u3069\u306e\u5927\u5bb9\u91cf\u30d5\u30a1\u30a4\u30eb\u304c\u5897\u52a0\u3057\u3066\u3044\u308b\uff0e\u7279\u306b\uff0c\u97f3\u697d\u914d\u4fe1\u3067\u306fApple\uff0c\u52d5\u753b\u914d\u4fe1\u3067\u306fGyao\u306a\u3069\u306e\u30b5\u30fc\u30d3\u30b9\u304c\u666e\u53ca\u3057\u3066\u304a\u308a\uff0c\u6bd4\u8f03\u7684\u5927\u304d\u306a\u30c7\u30fc\u30bf\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u6a5f\u4f1a\u304c\u5897\u52a0\u3057\u3066\u3044\u308b\uff0e\u307e\u305f\uff0cPeer to Peer(P2P)\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u666e\u53ca\u306b\u4f34\u3044\uff0c\u3055\u3089\u306b\u5927\u5bb9\u91cf\u306a\u30d5\u30a3\u30a2\u30eb\u30c7\u30fc\u30bf\u306a\u3069\u3082\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u4ecb\u3057\u3066\u4ea4\u63db\u3055\u308c\u59cb\u3081\u3066\u3044\u308b\uff0e\u3055\u3089\u306b\uff0c\u6620\u50cf\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u914d\u4fe1\u3082\u3055\u307e\u3056\u307e\u306a\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u7b49\u3067\u958b\u59cb\u3055\u308c\u3066\u3044\u308b\uff0e\u3053\u306e\u3088\u3046\u306a\u6620\u50cf\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u4fe1\u30b5\u30fc\u30d3\u30b9\u306f\uff0c\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u304c\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u306b\u3088\u308b\u3082\u306e\u3067\u3042\u308b\uff0e\u5f93\u6765\uff0c\u524d\u8ff0\u3057\u305f\u3088\u3046\u306a\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u95b2\u89a7\u3059\u308b\u5834\u5408\uff0c\u3059\u3079\u3066\u306e\u30c7\u30fc\u30bf\u3092\u53d7\u4fe1\u3059\u308b\u307e\u3067\u5f85\u3064\u5fc5\u8981\u304c\u3042\u308a\uff0c\u96fb\u8a71\u56de\u7dda\u306a\u3069\u8ee2\u9001\u901f\u5ea6\u306e\u4f4e\u3044\u56de\u7dda\u3067\u306f\u95b2\u89a7\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\uff0e\u305d\u306e\u305f\u3081\uff0c\u4f4e\u901f\u306a\u56de\u7dda\u3067\u3082\u30de\u30eb\u30c1\u30e1\u30c7\u30a3\u30a2\u30c7\u30fc\u30bf\u306e\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u518d\u751f\u3092\u53ef\u80fd\u3068\u3059\u308b\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u304c\u7528\u3044\u3089\u308c\u3066\u3044\u308b\uff0e\u3057\u304b\u3057\uff0c\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u306b\u306f\uff0c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u304c\u306a\u3051\u308c\u3070\u6620\u50cf\u3092\u95b2\u89a7\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\uff0c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u5927\u304d\u306a\u8ca0\u8377\u3092\u4e0e\u3048\u308b\uff0c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u56de\u7dda\u306e\u30c7\u30fc\u30bf\u8ee2\u9001\u30b9\u30d4\u30fc\u30c9\u3084\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u30d1\u30ef\u30fc\u306b\u753b\u8cea\u304c\u5f71\u97ff\u3055\u308c\u308b\u306a\u3069\u306e\u6b20\u70b9\u304c\u3042\u308b\uff0e\u4eca\u5f8c\u666e\u53ca\u3059\u308b\u3068\u4e88\u60f3\u3055\u308c\u308bHD\u30af\u30e9\u30b9\u306e\u6620\u50cf\u30b3\u30f3\u30c6\u30f3\u30c4\u306f\u30c7\u30fc\u30bf\u5bb9\u91cf\u304c\u83ab\u5927\u306a\u305f\u3081\uff0c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u4e0e\u3048\u308b\u591a\u5927\u306a\u8ca0\u8377\u3084\uff0c\u753b\u8cea\u306e\u52a3\u5316\u3092\u8003\u3048\u308b\u3068\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u306b\u3088\u308b\u914d\u4fe1\u306f\u96e3\u3057\u3044\uff0e\u305d\u3053\u3067\u3001\u672c\u7814\u7a76\u3067\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3092\u4ecb\u3057\u3066\u3001\u3053\u306e\u3088\u3046\u306a\u5de8\u5927\u30d5\u30a1\u30a4\u30eb\u30c7\u30fc\u30bf\u3092\u30bf\u30fc\u30b2\u30c3\u30c8\u3068\u3057\u305f\u65b0\u3057\u3044\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u4fe1\u65b9\u5f0f\u3092\u63d0\u6848\u3059\u308b\u3002<\/p>\n<p><strong>\u5148\u8aad\u307fProxy\u3092\u7528\u3044\u305f\u4e8b\u524d\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/strong><\/p>\n<ol>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u3092\u4ecb\u3057\u3066Web\u30b5\u30fc\u30d0\u306b\u30a2\u30af\u30bb\u30b9<\/li>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30a2\u30af\u30bb\u30b9\u3092\u53d7\u3051\u3066\uff0c\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u306fWeb\u30b5\u30fc\u30d0\u306eHTML\u6587\u66f8\u3092\u89e3\u6790\u3057\u3059\u3079\u3066\u306e\u30df\u30e9\u30fc\u30b5\u30fc\u30d0\u3078\u306e\u30ea\u30f3\u30af\u3092\u62bd\u51fa<\/li>\n<li>\u540c\u6642\u306b\u3059\u3079\u3066\u306e\u30df\u30e9\u30fc\u30b5\u30fc\u30d0\u3078\u306e\u7a7a\u304d\u5e2f\u57df\u72b6\u6cc1\uff0c\u56de\u7dda\u901f\u5ea6\u306a\u3069\u3092\u8abf\u3079\u5fdc\u7b54\u6642\u9593\u304c\u6700\u77ed\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u5148\u3092\u9078\u629e<\/li>\n<li>\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u306f\uff0c\u9078\u629e\u3055\u308c\u305f\u5fdc\u7b54\u6642\u9593\u304c\u6700\u77ed\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u5148\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u8981\u6c42\uff0e\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u304c\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u3057\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58<\/li>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\uff0cWeb\u30b5\u30fc\u30d0\u304b\u3089\u3067\u306f\u306a\u304f\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-3486 alignnone\" src=\"http:\/\/www.yamanaka.ics.keio.ac.jp\/wp-content\/uploads\/2015\/09\/1451.gif\" alt=\"1451\" width=\"450\" height=\"366\" \/><\/p>\n<p><strong>P2P\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u3088\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u4fe1<\/strong><\/p>\n<ol>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u3092\u4ecb\u3057\u3066\u30b3\u30f3\u30c6\u30f3\u30c4\u30b5\u30fc\u30d0\u306b\u30a2\u30af\u30bb\u30b9<\/li>\n<li>\u30b3\u30f3\u30c6\u30f3\u30c4\u30b5\u30fc\u30d0\u306f\u30ea\u30af\u30a8\u30b9\u30c8\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u4e00\u81f4\u3059\u308b\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30ea\u30b9\u30c8\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304b\u3089\u691c\u7d22\uff0e\u691c\u7d22\u3055\u308c\u305f\u3059\u3079\u3066\u306e\u30df\u30e9\u30fc\u306bping\u3092\u9001\u4fe1\u3057\uff0cRound Trip Time (RTT) \u3092\u8a08\u6e2c<\/li>\n<li>XML\u3092\u52d5\u7684\u306b\u66f8\u304d\u51fa\u3057\uff0cRTT\u304c\u6700\u77ed\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u5148\u3068\u3057\u3066\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u8868\u793a<\/li>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u8868\u793a\u3055\u308c\u305f\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u5148\u306b\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u8981\u6c42<\/li>\n<li>P2P\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\uff0c\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58<\/li>\n<li>\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306f\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-3487 alignnone\" src=\"http:\/\/www.yamanaka.ics.keio.ac.jp\/wp-content\/uploads\/2015\/09\/1452.gif\" alt=\"1452\" width=\"450\" height=\"352\" \/><\/p>\n<p><strong>\u30d7\u30ed\u30c8\u30b3\u30eb\u5909\u63db<\/strong><br \/>\n\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u30b5\u30fc\u30d0\u3078\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u5f93\u6765\u540c\u69d8\u306bHTTP\u3067\u884c\u3046\uff0e\u3057\u304b\u3057\uff0c\u30b5\u30fc\u30d0\u304b\u3089\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3078\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u4fe1\u3092\u884c\u3046\u5834\u5408\u306f\uff0cHTTP\u3092\u7528\u3044\u308b\u306e\u3067\u306f\u306a\u304f\uff0cFTP\u3084P2P\u30d7\u30ed\u30c8\u30b3\u30eb\uff0c\u3055\u3089\u306b\u4e0b\u4f4d\u30ec\u30a4\u30e4\u306b\u304a\u3044\u3066Optical Burst Switching(OBS)\u3092\u7528\u3044\u308b\u624b\u6cd5\u306a\u3069\u304c\u8003\u3048\u3089\u308c\u308b\uff0e\u3053\u306e\u3053\u3068\u306b\u3088\u308a\uff0c\u6620\u753b\u306a\u3069\u306e\u30ea\u30c3\u30c1\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u6642\u9593\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3067\u304d\u308b\uff0e<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-3488 alignnone\" src=\"http:\/\/www.yamanaka.ics.keio.ac.jp\/wp-content\/uploads\/2015\/09\/1453.gif\" alt=\"1453\" width=\"450\" height=\"300\" \/><\/p>\n<h2>\u7814\u7a76\u696d\u7e3e<\/h2>\n<ul>\n<li>\u8fbb\u667a\u535a\uff0c\u672c\u9593\u6f64\u4e00\u90ce\uff0c\u6e05\u6c34\u7fd4\uff0c\u8352\u5ddd\u8c4a\uff0c\u5c71\u4e2d\u76f4\u660e, &#8220;\u30d0\u30fc\u30b9\u30c8\u8ee2\u9001\u3092\u7528\u3044\u305f\u30df\u30e9\u30fc\u30b5\u30fc\u30d0\u81ea\u52d5\u9078\u629e\u578b\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u30d7\u30ed\u30c8\u30b3\u30eb\u30d7\u30ed\u30ad\u30b7\u306e\u63d0\u6848,&#8221; \u96fb\u5b50\u60c5\u5831\u901a\u4fe1\u5b66\u4f1a\u6280\u8853\u7814\u7a76\u5831\u544a, PN2005-119, pp115-119, 2006\u5e743\u6708<\/li>\n<\/ul>\n<p><strong>\u8ca0\u8377\u306b\u3088\u308b\u30de\u30eb\u30c1\u30ad\u30e3\u30b9\u30c8\/\u30e6\u30cb\u30ad\u30e3\u30b9\u30c8\u914d\u4fe1\u5207\u66ff<\/strong><br \/>\nCDN\u3067\u306f\uff0c\u5404\u3005\u304c\u30aa\u30ea\u30b8\u30f3\u30b5\u30fc\u30d0\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u5168\u3066\u3082\u3057\u304f\u306f\u4e00\u90e8\u3092\u6301\u3063\u305f\u30b5\u30ed\u30b2\u30fc\u30c8\u30b5\u30fc\u30d0\uff08\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30fc\u30d0\uff09\u3092\u5730\u7406\u7684\u306b\u8907\u6570\u306b\u5206\u6563\u914d\u7f6e\u3057\u305f\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u69cb\u6210\u3059\u308b\uff0e\u30e6\u30fc\u30b6\u8981\u6c42\u3092\u9069\u5207\u306a\u30b5\u30ed\u30b2\u30fc\u30c8\u30b5\u30fc\u30d0\u306b\u5206\u6563\u3055\u305b\u308b\u3053\u3068\u3067\u30b5\u30fc\u30d0\u306e\u8ca0\u8377\u306e\u4f4e\u6e1b\u3092\u56f3\u3063\u3066\u3044\u308b\u304c\uff0c\u30b5\u30fc\u30d0\u306e\u51e6\u7406\u80fd\u529b\u306b\u306f\u9650\u754c\u304c\u3042\u308b\u305f\u3081\uff0c\u5927\u591a\u6570\u306e\u30e6\u30fc\u30b6\u8981\u6c42\u306b\u5bfe\u5fdc\u3057\u304d\u308c\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\uff0e<br 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class=\"twitter-share-button\">\u30c4\u30a4\u30fc\u30c8<\/a><\/div>","protected":false},"excerpt":{"rendered":"<p>\u8fd1\u5e74\uff0cWeb\u30b5\u30fc\u30d3\u30b9\u306e\u6025\u901f\u306a\u666e\u53ca\u304a\u3088\u3073\u30a2\u30af\u30bb\u30b9\u7db2\u306e\u9ad8\u901f\u5316\u306b\u4f34\u3044\uff0c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4f1d\u9001\u3055\u308c\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u3057\u3066\uff0c\u30ea\u30c3\u30c1\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u547c\u3070\u308c\u308b\u6620\u753b\u3084\u97f3\u697d\u306a\u3069\u306e\u5927\u5bb9\u91cf\u30d5\u30a1\u30a4\u30eb\u304c\u5897\u52a0\u3057\u3066\u3044\u308b\uff0e\u7279\u306b\uff0c\u97f3\u697d\u914d\u4fe1\u3067\u306fApple\uff0c\u52d5\u753b\u914d\u4fe1\u3067\u306f &hellip; <a href=\"https:\/\/www.yamanaka.ics.keio.ac.jp\/?page_id=3482\" class=\"more-link\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"screen-reader-text\">\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u4fe1\u7db2<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2468,"menu_order":7,"comment_status":"closed","ping_status":"closed","template":"","meta":{"two_page_speed":[],"footnotes":""},"class_list":["post-3482","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/pages\/3482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3482"}],"version-history":[{"count":2,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/pages\/3482\/revisions"}],"predecessor-version":[{"id":5269,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/pages\/3482\/revisions\/5269"}],"up":[{"embeddable":true,"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=\/wp\/v2\/pages\/2468"}],"wp:attachment":[{"href":"https:\/\/www.yamanaka.ics.keio.ac.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}