{"id":19185,"date":"2026-04-19T11:52:03","date_gmt":"2026-04-19T09:52:03","guid":{"rendered":"https:\/\/webhosting.de\/dns-query-minimization-performance-resolver-cache-opti\/"},"modified":"2026-04-19T11:52:03","modified_gmt":"2026-04-19T09:52:03","slug":"dns%e3%82%af%e3%82%a8%e3%83%aa%e6%9c%80%e5%b0%8f%e5%8c%96%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e3%83%aa%e3%82%be%e3%83%ab%e3%83%90%e3%83%bc%e3%82%ad%e3%83%a3%e3%83%83","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/dns-query-minimization-performance-resolver-cache-opti\/","title":{"rendered":"DNS\u30af\u30a8\u30ea\u306e\u6700\u5c0f\u5316\uff1a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3068\u6700\u9069\u5316"},"content":{"rendered":"<p><strong>DNS\u30af\u30a8\u30ea\u306e\u6700\u5c0f\u5316<\/strong> \u306f\u540d\u524d\u89e3\u6c7a\u6642\u306e\u30c7\u30fc\u30bf\u30fb\u30c8\u30ec\u30fc\u30b9\u3092\u524a\u6e1b\u3057\u307e\u3059\u304c\u3001\u3088\u308a\u591a\u304f\u306e\u30af\u30a8\u30ea\u30fc\u3068\u5f85\u3061\u6642\u9593\u3092\u767a\u751f\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002RFC 9156\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u304c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u306e\u304b\u3001\u3069\u306e\u3088\u3046\u306a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u52b9\u679c\u304c\u6e2c\u5b9a\u53ef\u80fd\u306a\u306e\u304b\u3001\u305d\u3057\u3066\u3069\u306e\u3088\u3046\u306b\u30bf\u30fc\u30b2\u30c3\u30c8\u3092\u7d5e\u3063\u305f\u6700\u9069\u5316\u3067\u305d\u308c\u3092\u88dc\u3046\u306e\u304b\u3001\u5177\u4f53\u7684\u306b\u8aac\u660e\u3057\u307e\u3059\u3002.<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n<p>\u4ee5\u4e0b\u306e\u30ad\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3068\u30b9\u30d4\u30fc\u30c9\u306e\u9069\u5207\u306a\u30d0\u30e9\u30f3\u30b9\u3092\u53d6\u308b\u306e\u306b\u5f79\u7acb\u3064\u3002.<\/p>\n<ul>\n  <li><strong>\u4fdd\u8b77<\/strong> 1\u30b9\u30c6\u30c3\u30d7\u3042\u305f\u308a\u306e\u958b\u793a\u30e9\u30d9\u30eb\u6570\u304c\u5c11\u306a\u3044\u305f\u3081<\/li>\n  <li><strong>\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u5897\u52a0<\/strong> \u30b3\u30fc\u30eb\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u4ed8\u304d15-26%\u3088\u308a<\/li>\n  <li><strong>\u30a8\u30e9\u30fc\u7387<\/strong> \u6700\u9069\u5316\u306a\u3057\u3067+5%\u307e\u3067<\/li>\n  <li><strong>PSL+1<\/strong> \u7121\u99c4\u306a\u30af\u30a8\u30ea\u3092\u524a\u6e1b<\/li>\n  <li><strong>\u30ad\u30e3\u30c3\u30b7\u30f3\u30b0<\/strong> \u3068RFC 8198\u304c\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u8efd\u6e1b\u3059\u308b<\/li>\n<\/ul>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/dnsoptimierung-rechenzentrum-1847.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>DNS\u30af\u30a8\u30ea\u30fc\u6700\u5c0f\u5316\u306e\u4ed5\u7d44\u307f<\/h2>\n\n<p>\u3067\u9001\u308b\u3002 <strong>\u30af\u30a4\u30f3<\/strong> \u306e\u3088\u3046\u306b\u3001\u3059\u3050\u306b\u30d5\u30eb\u30cd\u30fc\u30e0\u3067\u306f\u306a\u304f\u3001\u30c7\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u306b\u3064\u306a\u304c\u308b\u6b21\u306e\u30e9\u30d9\u30eb\u3060\u3051\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u30eb\u30fc\u30c8\u306b \u201cwww.bigbank.example \u201d\u3092\u9001\u308b\u4ee3\u308f\u308a\u306b\u3001\u307e\u305a \u201cexample \u201d\u3092\u5c0b\u306d\u3001\u6b21\u306b\u95a2\u9023\u3059\u308b\u5834\u6240\u3067 \u201cbigbank.example \u201d\u3092\u5c0b\u306d\u3001\u6700\u5f8c\u306b\u521d\u3081\u3066\u5b8c\u5168\u306a\u8cea\u554f\u304c\u62c5\u5f53\u30db\u30b9\u30c8\u306b\u9001\u3089\u308c\u308b\u3002\u3053\u306e\u30b9\u30c6\u30c3\u30d7\u30d0\u30a4\u30b9\u30c6\u30c3\u30d7\u306e\u89e3\u6c7a\u306f\u3001\u4ee5\u4e0b\u306e\u30d3\u30e5\u30fc\u3092\u5236\u9650\u3057\u307e\u3059\u3002 <strong>\u7167\u4f1a\u6e08\u307f<\/strong> \u30eb\u30fc\u30c8\u30b5\u30fc\u30d0\u30fc\u3068TLD\u30b5\u30fc\u30d0\u30fc\u306e\u305f\u3081\u306e\u60c5\u5831\u3002RFC 9156\u306f\u53e4\u3044RFC 7816\u3068\u6bd4\u8f03\u3057\u305f\u52d5\u4f5c\u3092\u898f\u5b9a\u3057\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3001CNAME\u30ab\u30b9\u30b1\u30fc\u30c9\u3001NXDOMAIN\u306e\u3088\u3046\u306a\u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u3092\u6271\u3063\u3066\u3044\u307e\u3059\u3002BIND\u3068Unbound\u306e\u5b9f\u88c5\u306f\u3053\u308c\u3089\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u306b\u6e96\u62e0\u3057\u3066\u304a\u308a\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u306e\u5411\u4e0a\u3092\u6e2c\u5b9a\u53ef\u80fd\u306b\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<p>\u9732\u51fa\u304c\u5c11\u306a\u3044\u65b9\u304c\u3044\u3044 <strong>\u30e9\u30d9\u30eb<\/strong> \u3057\u304b\u3057\u3001\u3088\u308a\u591a\u304f\u306e\u30ec\u30d9\u30eb\u304c\u5fc5\u8981\u306b\u306a\u3063\u305f\u5834\u5408\u3001\u6642\u9593\u3092\u5931\u3046\u3002\u3053\u306e\u8a2d\u8a08\u306b\u3088\u308a\u3001\u7279\u306b\u7121\u95a2\u4fc2\u306a\u30a4\u30f3\u30d5\u30e9\u30ec\u30d9\u30eb\u3078\u306e\u30c7\u30fc\u30bf\u6f0f\u6d29\u304c\u6e1b\u5c11\u3057\u307e\u3059\u3002Cloudflare\u306f\u3053\u306e\u53b3\u683c\u306a\u5b9f\u88c5\u30921.1.1.1\u3067\u78ba\u8a8d\u3057\u3066\u304a\u308a\u3001\u78ba\u5b9f\u306b\u6f0f\u3048\u3044\u3092\u9632\u3044\u3067\u3044\u308b\u3002\u5b9f\u969b\u306b\u306f\u3001\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u6df1\u304f\u30cd\u30b9\u30c8\u3057\u305f\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u5bfe\u3057\u3066\u7279\u306b\u6709\u52b9\u3067\u3042\u308b\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306f\u65e5\u3005\u306e\u30d3\u30b8\u30cd\u30b9\u306b\u304a\u3044\u3066\u30be\u30fc\u30f3\u69cb\u9020\u304c\u3069\u306e\u3088\u3046\u306b\u898b\u3048\u308b\u304b\u3001\u6700\u5c0f\u5316\u304c\u771f\u306e\u4ed8\u52a0\u4fa1\u5024\u3092\u63d0\u4f9b\u3059\u308b\u306e\u306f\u3069\u3053\u304b\u306b\u3064\u3044\u3066\u3001\u65e9\u3044\u6bb5\u968e\u3067\u691c\u8a0e\u3059\u308b\u3053\u3068\u306b\u3057\u3066\u3044\u308b\u3002.<\/p>\n\n<h2>\u30ec\u30be\u30eb\u30d0\u306b\u304a\u3051\u308b\u6e2c\u5b9a\u53ef\u80fd\u306a\u6027\u80fd\u52b9\u679c<\/h2>\n\n<p>\u6b69\u6570\u304c\u5897\u3048\u308b\u3068\u3044\u3046\u3053\u3068\u306f\u3001\u591a\u304f\u306e\u5834\u5408 <strong>\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/strong>\u6e2c\u5b9a\u306b\u3088\u308b\u3068\u3001\u30be\u30fc\u30f3\u306e\u6df1\u3055\u3068\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u72b6\u614b\u306b\u3088\u3063\u3066\u300115\uff5e26\u30d1\u30fc\u30bb\u30f3\u30c8\u306e\u5897\u52a0\u304c\u898b\u3089\u308c\u305f\u3002\u30c6\u30b9\u30c8\u3067\u306f\u3001\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306fUnbound\u3067\u7d0417\uff5e19\u30d1\u30fc\u30bb\u30f3\u30c8\u3001BIND\u306715\uff5e26\u30d1\u30fc\u30bb\u30f3\u30c8\u5897\u52a0\u3057\u305f\u3002IPv6\u3067\u306f\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u6570\u304c\u6700\u592718\u306b\u9054\u3057\u3001\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u3054\u3068\u306e\u5f85\u3061\u6642\u9593\u304c\u5927\u5e45\u306b\u5897\u52a0\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6e80\u305f\u3055\u306a\u3044\u5834\u5408\u3001\u6700\u59275\u30d1\u30fc\u30bb\u30f3\u30c8\u306e\u30a8\u30e9\u30fc\u30b1\u30fc\u30b9\u304c\u5897\u3048\u3001\u7d0426\u30d1\u30fc\u30bb\u30f3\u30c8\u306e\u30af\u30a8\u30ea\u304c\u5897\u3048\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u30d4\u30fc\u30af\u6642\u306b\u306f\u30da\u30fc\u30b8\u306e\u30ed\u30fc\u30c9\u6642\u9593\u304c\u8457\u3057\u304f\u9577\u304f\u306a\u308b\u3002.<\/p>\n\n<p>\u79c1\u306f\u3053\u308c\u3089\u3092\u4fdd\u7ba1\u3057\u3066\u3044\u308b\u3002 <strong>\u6307\u6a19<\/strong> \u3068\u3044\u3046\u306e\u3082\u3001\u3053\u308c\u3089\u306f\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u306e\u3082\u305f\u3064\u304d\u3092\u8aac\u660e\u3059\u308b\u3082\u306e\u3060\u304b\u3089\u3060\u3002\u30b3\u30fc\u30eb\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u305d\u306e\u5f71\u97ff\u3092\u5897\u5927\u3055\u305b\u3001\u30a6\u30a9\u30fc\u30e0\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u305d\u308c\u3092\u6ed1\u3089\u304b\u306b\u3059\u308b\u3002\u30cd\u30ac\u30c6\u30a3\u30d6\u30fb\u30ec\u30b9\u30dd\u30f3\u30b9(NXDOMAIN)\u3092\u6700\u5c0f\u5316\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u826f\u3044\u30ad\u30e3\u30c3\u30b7\u30e5\u304c\u3067\u304d\u308b\u3002\u3057\u304b\u3057\u3001\u6210\u529f\u3057\u305f\u30b1\u30fc\u30b9\u3067\u306f\u3001\u5bfe\u7b56\u3092\u8b1b\u3058\u306a\u3051\u308c\u3070\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u652f\u914d\u7684\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3002\u305d\u306e\u305f\u3081\u3001\u30ea\u30be\u30eb\u30d0\u5074\u306e\u8ca0\u8377\u3092\u6e1b\u3089\u3059\u3053\u3068\u3092\u7279\u306b\u8a08\u753b\u3057\u3066\u3044\u308b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/dns_query_meeting_4627.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565\u3068\u30b3\u30fc\u30eb\u30c9\u30b9\u30bf\u30fc\u30c8<\/h2>\n\n<p>\u3092\u57cb\u3081\u308b\u3002 <strong>\u30ad\u30e3\u30c3\u30b7\u30e5<\/strong> \u5909\u66f4\u3092\u30e9\u30a4\u30d6\u306b\u5207\u308a\u66ff\u3048\u3001\u5341\u5206\u306b\u5927\u304d\u306a\u30b9\u30c8\u30ec\u30fc\u30b8\u30a6\u30a3\u30f3\u30c9\u30a6\u306b\u4f9d\u5b58\u3059\u308b\u524d\u306b\u3001\u30d7\u30ed\u30a2\u30af\u30c6\u30a3\u30d6\u306b\u3002\u3053\u308c\u306f\u3001\u53cd\u5fa9\u7684\u306a\u554f\u3044\u5408\u308f\u305b\u304c\u3001\u6e96\u5099\u306a\u3057\u306b\u59d4\u4efb\u306e\u9023\u9396\u306b\u3076\u3064\u304b\u308b\u53ef\u80fd\u6027\u304c \u4f4e\u3044\u3053\u3068\u3092\u610f\u5473\u3059\u308b\u3002RFC 8198\u306b\u5f93\u3063\u305f\u7a4d\u6975\u7684\u306a\u30cd\u30ac\u30c6\u30a3\u30d6\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u3001\u30ea\u30be\u30eb\u30d0\u304cNSEC\/NSEC3\u60c5\u5831\u304b\u3089\u6709\u52b9\u306a\u975e\u5b58\u5728\u3092\u63a8\u6e2c\u3067\u304d\u308b\u305f\u3081\u3001\u3055\u3089\u306a\u308b\u30e9\u30a6\u30f3\u30c9\u3092\u7bc0\u7d04\u3059\u308b\u3002\u30b3\u30fc\u30eb\u30c9\u30b9\u30bf\u30fc\u30c8\u306f\u3001\u4f8b\u3048\u3070 \u518d\u8d77\u52d5\u5f8c\u3084\u65b0\u3057\u3044\u30be\u30fc\u30f3\u306e\u5834\u5408\u3001\u4f9d\u7136\u3068\u3057\u3066\u91cd\u8981\u3067\u3042\u308b\u3002\u8a73\u7d30\u306e\u7d39\u4ecb\u3068\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u30b3\u30f3\u30d1\u30af\u30c8\u306a\u3082\u306e\u3092\u53c2\u7167\u3055\u308c\u305f\u3044\u3002 <a href=\"https:\/\/webhosting.de\/ja\/dns%e3%83%aa%e3%82%be%e3%83%ab%e3%83%90%e3%81%ae%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9-%e3%82%ad%e3%83%a3%e3%83%83%e3%82%b7%e3%83%a5%e6%88%a6%e7%95%a5-%e3%82%ad%e3%83%a3\/\">\u30ad\u30e3\u30c3\u30b7\u30e5\u6226\u7565<\/a>, \u3053\u308c\u306f\u79c1\u304c\u5b9f\u969b\u306b\u4f7f\u3063\u3066\u3044\u308b\u3082\u306e\u3060\u3002.<\/p>\n\n<p>\u79c1\u306f\u8ce2\u660e\u306a\u9078\u629e\u3092\u3059\u308b <strong>TTL<\/strong>-\u5024\uff1a\u8ca0\u8377\u304c\u5c11\u306a\u3044\u307b\u3069\u9577\u304f\u3001\u30b5\u30fc\u30d3\u30b9\u306e\u79fb\u52d5\u306b\u306f\u5341\u5206\u77ed\u3044\u3002\u65b0\u3057\u3044\u30ec\u30b3\u30fc\u30c9\u304c\u3088\u308a\u65e9\u304f\u666e\u53ca\u3059\u308b\u3088\u3046\u306b\u3001\u79fb\u8ee2\u306e\u76f4\u524d\u306bTTL\u3092\u4e0b\u3052\u308b\u3002\u5909\u66f4\u5f8c\u306f\u3001\u5916\u90e8\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306e\u6570\u3092\u5c11\u306a\u304f\u4fdd\u3064\u305f\u3081\u306b\u518d\u3073TTL\u3092\u4e0a\u3052\u308b\u3002\u3053\u308c\u306f\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u3067\u306f\u9855\u8457\u3067\u3001DNS\u306f\u77e5\u899a\u3055\u308c\u308b\u9045\u5ef6\u306e10\u301c25\u30d1\u30fc\u30bb\u30f3\u30c8\u3092\u5360\u3081\u308b\u3053\u3068\u304c\u591a\u3044\u304b\u3089\u3060\u3002\u3053\u306e\u3088\u3046\u306b\u3001\u79c1\u306fQMIN\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306b\u5bfe\u3059\u308b\u30c6\u30b3\u3068\u3057\u3066\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4f7f\u3063\u3066\u3044\u308b\u3002.<\/p>\n\n<h2>\u30b9\u30c6\u30fc\u30eb\u3001\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u3001\u30c9\u30ec\u30a4\u30f3\u30d0\u30c3\u30d5\u30a1\u306e\u63d0\u4f9b<\/h2>\n<p>\u79c1\u306f\u201c<strong>\u53e4\u304f\u306a\u3063\u305f\u3082\u306e\u3092\u51fa\u3059<\/strong>\u201d\uff08\u9673\u8150\u306a\u56de\u7b54\uff09\u3068 <strong>\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1<\/strong>, \u3092\u4f7f\u7528\u3057\u3066\u3001\u30d4\u30fc\u30af\u6642\u306e\u5f85\u3061\u6642\u9593\u3092\u7de9\u548c\u3059\u308b\u3002\u6a29\u5a01\u30b5\u30fc\u30d0\u30fc\u304c\u4f4e\u901f\u307e\u305f\u306f\u4e00\u6642\u7684\u306b\u5229\u7528\u3067\u304d\u306a\u3044\u5834\u5408\u3001Serve-Stale\u3092\u5099\u3048\u305f\u30ea\u30be\u30eb\u30d0\u306f\u3001\u65b0\u3057\u3044\u30c7\u30fc\u30bf\u304c\u518d\u30ed\u30fc\u30c9\u3055\u308c\u308b\u307e\u3067\u306e\u77ed\u671f\u9593\u3001\u671f\u9650\u5207\u308c\u306e\u5fdc\u7b54\u3092\u914d\u4fe1\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u30a8\u30af\u30b9\u30da\u30ea\u30a8\u30f3\u30b9\u3068\u30a2\u30c3\u30d7\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u9045\u3055\u3092\u5207\u308a\u96e2\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u4e00\u65b9\u3001\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u306f\u3001\u4eba\u6c17\u306e\u3042\u308b\u30a8\u30f3\u30c8\u30ea\u30fc\u3092TTL\u304c\u5207\u308c\u308b\u524d\u306b\u30ea\u30ed\u30fc\u30c9\u3059\u308b\u3002\u3069\u3061\u3089\u3082\u3001QMIN\u304c\u30c7\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30c1\u30a7\u30fc\u30f3\u5168\u4f53\u3092\u518d\u5ea6\u901a\u904e\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u983b\u5ea6\u3092\u6e1b\u3089\u3057\u307e\u3059\u3002\u660e\u78ba\u306a\u5236\u9650\u306f\u91cd\u8981\u3067\u3042\u308b\uff1a\u79c1\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u95a2\u9023\u3059\u308b\u30be\u30fc\u30f3\u306eTTL\u3092\u77ed\u304f\u8a2d\u5b9a\u3057\u3001\u983b\u7e41\u306a\u30d2\u30c3\u30c8\u306b\u5bfe\u3057\u3066\u306e\u307f\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u3092\u6709\u52b9\u306b\u3059\u308b\u3053\u3068\u3067\u3001\u4f5c\u696d\u3068\u5229\u76ca\u306e\u30d0\u30e9\u30f3\u30b9\u3092\u3068\u3063\u3066\u3044\u308b\u3002.<\/p>\n\n<h2>\u516c\u958b\u30b5\u30d5\u30a3\u30c3\u30af\u30b9\u30ea\u30b9\u30c8\u306b\u3088\u308b\u30ea\u30be\u30eb\u30d0\u306e\u6700\u9069\u5316<\/h2>\n\n<p>\u3067\u30df\u30cb\u30de\u30e0\u3092\u3084\u3081\u308b\u3053\u3068\u304c\u591a\u3044\u3002 <strong>PSL+1<\/strong>, \u516c\u958b\u63a5\u5c3e\u8f9e\u30ea\u30b9\u30c8\u306e\u76f4\u4e0b\u306b\u3042\u308a\u307e\u3059\u3002\u4f8b\uff1a\u201ca.b.example.com \u201d\u306e\u5834\u5408\u3001\u79c1\u306f\u3059\u3067\u306b \u201cexample.com \u201d\u306e\u5f8c\u306b\u5b8c\u5168\u306a\u8cea\u554f\u3092\u9001\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u306a\u65b9\u6cd5\u306b\u3088\u3063\u3066\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u306e\u640d\u5931\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u306a\u304c\u3089\u4f5c\u696d\u306e\u91cd\u8907\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u4e0d\u5fc5\u8981\u306a\u30e9\u30a6\u30f3\u30c9\u30c8\u30ea\u30c3\u30d7\u3092\u6e1b\u3089\u3057\u3001\u5f85\u3061\u6642\u9593\u3068\u30a8\u30e9\u30fc\u7387\u3092\u4e0b\u3052\u308b\u3002IETF\u30c9\u30e9\u30d5\u30c8\u306f\u3001\u3053\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u660e\u78ba\u306b\u63d0\u6848\u3057\u3066\u3044\u308b\u3002.<\/p>\n\n<p>\u79c1\u306f\u307e\u305f\u3001\u8ce2\u660e\u306a <strong>\u9650\u754c<\/strong> \u3092\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u3054\u3068\u306e\u6700\u5927\u6df1\u5ea6\u306b\u6307\u5b9a\u3059\u308b\u3002RFC 9156\u306f\u4e0a\u9650\u3068\u3057\u306610\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u304c\u3001\u3053\u308c\u306f\u500b\u3005\u306e\u30b1\u30fc\u30b9\u3067\u306fIPv6\u3067\u306f\u5341\u5206\u3067\u306f\u306a\u3044\u3002\u3053\u306e\u3088\u3046\u306a\u30b7\u30ca\u30ea\u30aa\u3067\u306f\u3001\u65e2\u77e5\u306e\u30c7\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30fb\u30dd\u30a4\u30f3\u30c8\u3067\u30bf\u30fc\u30b2\u30c3\u30c8\u3092\u7d5e\u3063\u305f\u8fc2\u56de\u3092\u652f\u63f4\u3059\u308b\u304b\u3001\u30ed\u30fc\u30ab\u30eb\u30fb\u30d2\u30f3\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3092\u66b4\u9732\u3059\u308b\u3053\u3068\u306a\u304fSERVFAIL\u306e\u30d4\u30fc\u30af\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30cd\u30b9\u30c8\u3055\u308c\u305f\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3067\u3042\u3063\u3066\u3082\u3001QMIN\u3092\u4e88\u6e2c\u53ef\u80fd\u306a\u72b6\u614b\u306b\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/dns-query-optimization-2375.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>EDNS\u3001ECS\u30010x20\u304a\u3088\u3073DNS\u30af\u30c3\u30ad\u30fc<\/h2>\n<p>\u79c1\u306f\u3069\u306e\u3088\u3046\u306b\u30d7\u30ec\u30fc\u3057\u3066\u3044\u308b\u304b\u306b\u6ce8\u610f\u3092\u6255\u3063\u3066\u3044\u308b\u3002 <strong>\u30a4\u30fc\u30c7\u30a3\u30fc\u30a8\u30cc\u30a8\u30b9<\/strong>-\u30a8\u30af\u30b9\u30c6\u30f3\u30b7\u30e7\u30f3\u306fQMIN\u3068\u76f8\u4e92\u4f5c\u7528\u3059\u308b\u3002. <strong>EDNS\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30d6\u30cd\u30c3\u30c8\uff08ECS\uff09<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8IP\u306e\u4e00\u90e8\u304c\u30af\u30a8\u30ea\u306b\u542b\u307e\u308c\u3066\u3057\u307e\u3046\u305f\u3081\u3067\u3059\u3002QMIN\u304c\u3042\u308b\u74b0\u5883\u3067\u306f\u3001\u5730\u7406\u7684\u306a\u30ed\u30fc\u30c9\u30d0\u30e9\u30f3\u30b7\u30f3\u30b0\u306e\u305f\u3081\u306b\u7d76\u5bfe\u306b\u5fc5\u8981\u3067\u306a\u3044\u9650\u308a\u3001\u79c1\u306fECS\u3092\u610f\u56f3\u7684\u306b\u6e1b\u3089\u3059\u304b\u505c\u6b62\u3057\u3066\u3044\u308b\u3002. <strong>0x20 \u30e9\u30f3\u30c0\u30e0\u5316<\/strong> (QNAME\u3067\u306f\u30e9\u30f3\u30c0\u30e0\u30b1\u30fc\u30b9\uff09\u306f\u4e92\u63db\u6027\u3092\u4fdd\u3061\u3001\u6700\u5c0f\u5316\u3092\u59a8\u3052\u308b\u3053\u3068\u306a\u304f\u3001\u306a\u308a\u3059\u307e\u3057\u306b\u5bfe\u3059\u308b\u8010\u6027\u3092\u9ad8\u3081\u308b\u3002. <strong>DNS\u30af\u30c3\u30ad\u30fc<\/strong> \u53cd\u5c04\/\u5897\u5e45\u3092\u9632\u304e\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30ec\u30d9\u30eb\u3067\u52d5\u4f5c\u3059\u308b\u305f\u3081\u3001\u3046\u307e\u304f\u9069\u5408\u3059\u308b\u3002\u79c1\u306fMTU\u3068\u30d5\u30e9\u30b0\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u76e3\u8996\u3057\u3066\u3044\u307e\u3059\u3002EDNS\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3059\u308b\u3068\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u30fb\u30b5\u30a4\u30ba\u304c\u5927\u304d\u304f\u306a\u308a\u3001UDP\u306e\u30d5\u30e9\u30b0\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u8a98\u767a\u3057\u307e\u3059\u3002\u5fc5\u8981\u3067\u3042\u308c\u3070\u3001\u640d\u5931\u3092\u907f\u3051\u308b\u305f\u3081\u306bTCP\u304bDoT\/DoH\u306b\u65e9\u3081\u306b\u5207\u308a\u66ff\u3048\u307e\u3059\u3002.<\/p>\n\n<h2>\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30b9\u30bf\u30c3\u30af\u3068WordPress\u3078\u306e\u5f71\u97ff<\/h2>\n\n<p>\u79c1\u306fDNA\u306e\u6642\u9593\u3092\u5358\u72ec\u3067\u6e2c\u5b9a\u3057\u3066\u3044\u308b\u3002 <strong>\u30df\u30ea\u79d2<\/strong> \u30e9\u30f3\u30ad\u30f3\u30b0\u3001\u30b3\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u3001TTFB\u306b\u5f71\u97ff\u3059\u308b\u3002\u52d5\u7684\u306a\u30da\u30fc\u30b8\u3067\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u9045\u5ef6\u3084N+1\u30b3\u30fc\u30eb\u3082\u5897\u5927\u3059\u308b\u3002\u5f37\u529b\u306a\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6301\u3064\u9ad8\u901f\u30ea\u30be\u30eb\u30d0\u306f\u3001\u3053\u308c\u3089\u306e\u30ea\u30b9\u30af\u3092\u7de9\u548c\u3057\u307e\u3059\u3002\u8a08\u753b\u7684\u306a\u79fb\u8ee2\u306e\u524d\u306b\u3001\u79c1\u306fTTL\u3092\u4e0b\u3052\u3066\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u65b0\u3057\u3044IP\u306b\u7d20\u65e9\u304f\u5230\u9054\u3057\u3001\u4e0d\u6b63\u306a\u30af\u30a8\u30ea\u304c\u5c11\u306a\u304f\u306a\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u30fc\u306b\u95a2\u3059\u308b\u8cea\u554f\u306b\u3064\u3044\u3066\u306f\u3001\u3053\u306e\u30b3\u30f3\u30d1\u30af\u30c8\u306a\u30b5\u30a4\u30c8\u3092\u53c2\u7167\u3055\u308c\u305f\u3044\u3002 <a href=\"https:\/\/webhosting.de\/ja\/dns%e3%82%a2%e3%83%bc%e3%82%ad%e3%83%86%e3%82%af%e3%83%81%e3%83%a3-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-%e3%83%aa%e3%82%be%e3%83%ab%e3%83%90-ttl%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc\/\">DNS\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/a>, \u79c1\u306f\u305d\u308c\u3092\u53c2\u8003\u306b\u3057\u3066\u3044\u308b\u3002.<\/p>\n\n<p>\u3092\u6301\u3063\u3066\u3044\u308b\u3002 <strong>\u4f1d\u64ad<\/strong> \u30e6\u30fc\u30b6\u30fc\u306b\u4e00\u8cab\u3057\u305f\u4f53\u9a13\u3092\u63d0\u4f9b\u3059\u308b\u305f\u3081\u3001\u76ee\u306b\u898b\u3048\u3066\u77ed\u304f\u306a\u308a\u307e\u3059\u3002\u9ad8\u901f\u306aDNS\u30ec\u30b9\u30dd\u30f3\u30b9\u306f\u3001\u4e0b\u6d41\u30ce\u30fc\u30c9\u306e\u6df7\u96d1\u3092\u7de9\u548c\u3057\u307e\u3059\u3002WordPress\u306e\u3088\u3046\u306a\u30b3\u30f3\u30c6\u30f3\u30c4\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u30c1\u30a7\u30fc\u30f3\u5185\u306e\u3059\u3079\u3066\u306e\u30b8\u30e3\u30f3\u30d7\u304c\u91cd\u8981\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u79c1\u306fHTTP\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3092\u59cb\u3081\u308b\u524d\u306b\u3001\u307e\u305a\u540d\u524d\u89e3\u6c7a\u3092\u78ba\u5b9f\u306b\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5b9f\u969b\u306e\u30a6\u30a7\u30d6\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u304cDNS\u306b\u3088\u3063\u3066\u9045\u304f\u306a\u308b\u306e\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n<h2>\u30d5\u30a9\u30ef\u30fc\u30c0\u30fc\u306e\u30c8\u30dd\u30ed\u30b8\u30fc\u3001\u30a8\u30cb\u30fc\u30ad\u30e3\u30b9\u30c8\u3001CDN\u306e\u8fd1\u63a5\u6027<\/h2>\n<p>\u306e\u3069\u3061\u3089\u304b\u3092\u610f\u8b58\u7684\u306b\u6c7a\u3081\u308b\u3002 <strong>\u30d5\u30eb\u30ea\u30dc\u30eb\u30d0\u30fc<\/strong> \u305d\u3057\u3066 <strong>\u30d5\u30a9\u30ef\u30fc\u30c0\u30fc<\/strong>. .\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4e0a\u6d41\u306b\u8ee2\u9001\u3059\u308b\u3068\u3001\u5b9f\u969b\u306e\u6700\u5c0f\u5316\u306f\u305d\u3053\u3067\u884c\u308f\u308c\u307e\u3059\u3002\u30ed\u30fc\u30ab\u30eb\u3067\u306f\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306f\u5c11\u306a\u304f\u306a\u308a\u307e\u3059\u304c\u3001PSL+1\u306a\u3069\u306e\u30dd\u30ea\u30b7\u30fc\u306e\u5236\u5fa1\u306f\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3059\u3002 \u79c1\u81ea\u8eab\u306e\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u3067\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d0\u30fc\u306e\u8fd1\u304f\u3067\u30d5\u30eb\u30ea\u30be\u30eb\u30d0\u3092\u904b\u7528\u3057\u3066\u3044\u307e\u3059\u3002 <strong>\u653e\u9001\u7981\u6b62<\/strong>, \u3092\u4f7f\u7528\u3057\u3066\u30d1\u30b9\u3092\u77ed\u7e2e\u3057\u3001\u30b8\u30c3\u30bf\u30fc\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u3002CDN\u3092\u591a\u7528\u3059\u308b\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u3064\u3044\u3066\u306f\u3001\u30ea\u30be\u30eb\u30d0\u304cCDN\u306e\u30a4\u30b0\u30b8\u30c3\u30c8\u30dd\u30a4\u30f3\u30c8\u306b\u5730\u7406\u7684\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30c8\u30dd\u30ed\u30b8\u30fc\u7684\u306b\u8fd1\u3044\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e9\u30a6\u30f3\u30c9\u30c8\u30ea\u30c3\u30d7\u304c\u5927\u5e45\u306b\u524a\u6e1b\u3055\u308c\u3001QMIN\u306b\u3088\u308b\u8ffd\u52a0\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u76f8\u5bfe\u5316\u3055\u308c\u308b\u3002.<\/p>\n\n<h2>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5074\u9762DoT\u3001DoH\u3001DNSSEC<\/h2>\n\n<p>\u30b3\u30f3\u30d0\u30a4\u30f3 <strong>\u30af\u30a4\u30f3<\/strong> DNS-over-TLS\u307e\u305f\u306fDNS-over-HTTPS\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u9014\u4e2d\u3067\u30af\u30a8\u30ea\u3092\u8aad\u307f\u53d6\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6700\u5c0f\u5316\u306f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u5236\u9650\u3057\u3001\u6697\u53f7\u5316\u306f\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u3092\u4fdd\u8b77\u3059\u308b\u3002\u3053\u306e2\u3064\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u4f75\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u653b\u6483\u5bfe\u8c61\u306f\u5927\u5e45\u306b\u6e1b\u5c11\u3059\u308b\u3002\u307e\u305f\u3001\u30ea\u30be\u30eb\u30d0\u3068\u6a29\u5a01\u30ce\u30fc\u30c9\u304c\u540c\u3058\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u8a71\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3082\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30ce\u30fc\u30c9\u9593\u306e\u8aa4\u89e3\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n<p>\u79c1\u306f\u7f72\u540d\u5165\u308a\u306e <strong>\u30be\u30fc\u30f3<\/strong> DNSSEC\u3092\u7d4c\u7531\u3059\u308b\u3053\u3068\u3067\u3001\u65e9\u3044\u6bb5\u968e\u3067\u4e0d\u6b63\u64cd\u4f5c\u306b\u6c17\u3065\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4fe1\u983c\u306e\u9023\u9396\u306f\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u5b8c\u5168\u6027\u3092\u5f37\u5316\u3057\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3092\u5236\u9650\u3057\u307e\u3059\u3002\u3053\u306e\u5b9f\u7528\u7684\u306a\u30ac\u30a4\u30c9\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u660e\u78ba\u306a\u6307\u793a\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002 <a href=\"https:\/\/webhosting.de\/ja\/dnssec-%e3%83%9b%e3%82%b9%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0-%e3%82%bb%e3%82%ad%e3%83%a5%e3%83%aa%e3%83%86%e3%82%a3%e5%ae%9f%e8%a3%85-%e3%83%88%e3%83%a9%e3%82%b9%e3%83%88%e3%83%81%e3%82%a7%e3%83%bc\/\">DNSSEC\u306e\u5b9f\u88c5<\/a>, \u79c1\u304c\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u4f7f\u7528\u3057\u3066\u3044\u308b\u3082\u306e\u3067\u3059\u3002QMIN\u3068DNSSEC\u306f\u4e92\u3044\u306b\u88dc\u5b8c\u3057\u5408\u3046\u3082\u306e\u3067\u3001\u540d\u524d\u306e\u516c\u958b\u304c\u5c11\u306a\u3044\u3053\u3068\u306b\u52a0\u3048\u3001\u7f72\u540d\u306b\u3088\u3063\u3066\u3088\u308a\u591a\u304f\u306e\u4fdd\u8b77\u304c\u5f97\u3089\u308c\u308b\u304b\u3089\u3067\u3059\u3002\u3053\u308c\u304c\u3001\u79c1\u304c\u30b3\u30f3\u30c6\u30f3\u30c4\u3068\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u4e21\u65b9\u3092\u4fdd\u8b77\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/dnsqueryoptmz4456.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>QMIN\u306e\u6307\u6a19\u3068\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0<\/h2>\n\n<p>\u79c1\u306f\u89b3\u5bdf\u3059\u308b <strong>\u4e3b\u306a\u6570\u5b57<\/strong> \u52b9\u679c\u3092\u6b63\u3057\u304f\u5272\u308a\u5f53\u3066\u308b\u305f\u3081\u306b\u3001\u7d99\u7d9a\u7684\u306b\u884c\u308f\u308c\u308b\u3002\u3053\u308c\u306b\u306f\u3001\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u3054\u3068\u306e\u30af\u30a8\u30ea\u30fc\u6570\u3001NXDOMAIN\/NOERROR\/SERVFAIL\u306e\u5272\u5408\u3001\u5e73\u5747\u5f85\u3061\u6642\u9593\u300195\/99\u30d1\u30fc\u30bb\u30f3\u30bf\u30a4\u30eb\u304c\u542b\u307e\u308c\u308b\u3002\u30b3\u30fc\u30eb\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u3068\u30a6\u30a9\u30fc\u30e0\u30ad\u30e3\u30c3\u30b7\u30e5\u306f\u30ab\u30fc\u30d6\u304c\u5927\u304d\u304f\u7570\u306a\u308b\u305f\u3081\u3001\u5206\u3051\u3066\u3044\u307e\u3059\u3002\u30d9\u30ea\u30b5\u30a4\u30f3\u3068SIDN Labs\u306f\u3001\u30eb\u30fc\u30c8\/TLD\u30ec\u30d9\u30eb\u3067\u3088\u308a\u77ed\u3044\u30af\u30a8\u30ea\u3092\u5831\u544a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30aa\u30fc\u30bd\u30ea\u30c6\u30a3\u30bf\u30c6\u30a3\u30d6\u3067\u306e\u6e2c\u5b9a\u304c\u7de9\u548c\u3055\u308c\u3001\u30ea\u30be\u30eb\u30d0\u3078\u306e\u8981\u6c42\u304c\u5927\u304d\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002QMIN\u306f\u3053\u306e\u30b7\u30d5\u30c8\u3092\u660e\u78ba\u306b\u53cd\u6620\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th><strong>\u30ad\u30fc\u30d1\u30fc\u30bd\u30f3<\/strong><\/th>\n      <th><strong>QMIN\u306a\u3057<\/strong><\/th>\n      <th><strong>QMIN\u3068<\/strong><\/th>\n      <th><strong>\u89e3\u91c8<\/strong><\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u30af\u30a8\u30ea\u30fc\/\u30eb\u30c3\u30af\u30a2\u30c3\u30d7<\/td>\n      <td>1-4<\/td>\n      <td>3\u301c8\uff08IPv6\u301c18\uff09<\/td>\n      <td>\u6b69\u6570\u304c\u5897\u3048\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u5897\u52a0<\/td>\n      <td>\u30d9\u30fc\u30b9<\/td>\n      <td>+15-26%<\/td>\n      <td>\u30e9\u30d9\u30eb\u3054\u3068\u306e\u89e3\u6c7a\u30b3\u30b9\u30c8<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30a8\u30e9\u30fc\u7387<\/td>\n      <td>\u30ed\u30fc<\/td>\n      <td>5%\u307e\u3067<\/td>\n      <td>\u30dc\u30fc\u30c0\u30fc\u30e9\u30a4\u30f3\u306e\u30b1\u30fc\u30b9\u3068\u5236\u9650\u304c\u9069\u7528\u3055\u308c\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>NXDOMAIN\u30d2\u30c3\u30c8\u7387<\/td>\n      <td>\u30df\u30c7\u30a3\u30a2\u30e0<\/td>\n      <td>\u3088\u308a\u9ad8\u3044<\/td>\n      <td>\u7a4d\u6975\u7684\u306a\u30cd\u30ac\u30c6\u30a3\u30d6\u30fb\u30ad\u30e3\u30c3\u30b7\u30f3\u30b0\u304c\u6709\u52b9<\/td>\n    <\/tr>\n    <tr>\n      <td>P95\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc<\/td>\n      <td>\u4e0d\u5909<\/td>\n      <td>\u30b3\u30fc\u30eb\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u3067\u5897\u52a0<\/td>\n      <td>\u30ad\u30e3\u30c3\u30b7\u30e5\u5145\u586b\u304c\u91cd\u8981<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<p>\u79c1\u3082\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002 <strong>\u904e\u53bb\u30ed\u30b0<\/strong> \u306f\u3001\u53b3\u683c\u306a\u6700\u5c0f\u5316\u3092\u793a\u3059\u4e00\u69d8\u3067\u77ed\u3044QNAME\u3092\u6301\u3064\u975e\u5178\u578b\u7684\u306a\u30b7\u30ea\u30fc\u30ba\u3067\u3042\u308b\u3002\u30c6\u30b9\u30c8\u30be\u30fc\u30f3\u306b\u5bfe\u3059\u308b\u30a2\u30af\u30c6\u30a3\u30d6\u30c6\u30b9\u30c8\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5f71\u97ff\u3092\u8fc5\u901f\u306b\u5b9a\u91cf\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u306e\u89b3\u70b9\u304b\u3089\u306f\u3001RUM\u30c7\u30fc\u30bf\u3092\u4f7f\u3063\u3066\u8ca0\u8377\u7d4c\u8def\u306eDNS\u90e8\u5206\u3092\u53ef\u8996\u5316\u3059\u308b\u3002\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u3068\u306e\u76f8\u95a2\u95a2\u4fc2\u304b\u3089\u3001\u8a2d\u5b9a\u30df\u30b9\u3092\u7d20\u65e9\u304f\u767a\u898b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u3046\u3057\u3066\u79c1\u306f\u3001\u5bfe\u75c7\u7642\u6cd5\u7684\u306a\u8b70\u8ad6\u3060\u3051\u3067\u306a\u304f\u3001\u30e1\u30c8\u30ea\u30c3\u30af\u30b9\u3068\u5bfe\u7b56\u3092\u7d50\u3073\u3064\u3051\u3066\u3044\u308b\u306e\u3067\u3059\u3002.<\/p>\n\n<h2>\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u306e\u8a2d\u5b9a\u3068\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/h2>\n<p>\u6e05\u6f54\u306b\u3059\u308b <strong>\u30e9\u30dc\u6e2c\u5b9a<\/strong> \u30e9\u30dc\u3067\u306f\u3001\u518d\u73fe\u53ef\u80fd\u306a\u30be\u30fc\u30f3\u30c8\u30e9\u30f3\u30af\uff08\u6df1\u3044 CNAME \u30c1\u30a7\u30fc\u30f3\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3001IPv6 PTR \u30c4\u30ea\u30fc\uff09\u3092\u6295\u5165\u3057\u3001\u30af\u30a8\u30ea\/\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u3001P50\/P95\u3001\u30ea\u30c8\u30e9\u30a4\u7387\u3001UDP\u2192PTR \u30c4\u30ea\u30fc\u3092\u6e2c\u5b9a\u3057\u3066\u3044\u308b\u3002\u30e9\u30dc\u3067\u306f\u3001\u518d\u73fe\u53ef\u80fd\u306a\u30be\u30fc\u30f3\u30c8\u30e9\u30f3\u30af\uff08\u30c7\u30a3\u30fc\u30d7CNAME\u30c1\u30a7\u30fc\u30f3\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3001IPv6 PTR\u30c4\u30ea\u30fc\uff09\u3092\u6295\u5165\u3057\u3001\u30af\u30a8\u30ea\/\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u3001P50\/P95\u3001\u518d\u8a66\u884c\u7387\u3001UDP\u2192TCP\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u8a08\u6e2c\u3059\u308b\u3002\u5b9f\u904b\u7528\u3067\u306f\u3001DNSTap\u307e\u305f\u306f\u30af\u30a8\u30ea\u30ed\u30b0\u304b\u3089\u306e\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3092\u4f7f\u7528\u3057\u3066\u30db\u30c3\u30c8\u30b9\u30dd\u30c3\u30c8\u3092\u8a8d\u8b58\u3057\u307e\u3059\u3002\u7570\u5e38\u5024\u306e\u5834\u5408\u306f\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308bQNAME\u3068\u59d4\u4efb\u30d1\u30b9\u3092\u30c8\u30ec\u30fc\u30b9\u3057\u3001\u7279\u306b\u4e0d\u6574\u5408\uff08NS\/DS\u306e\u4e0d\u4e00\u81f4\u3001\u53e4\u3044\u30b0\u30eb\u30fc\u30ec\u30b3\u30fc\u30c9\u3001\u3044\u3044\u52a0\u6e1b\u306a\u59d4\u4efb\uff09\u3092\u691c\u7d22\u3057\u307e\u3059\u3002\u91cd\u8981\uff1aQMIN\u306f\u30be\u30fc\u30f3\u306e\u81ea\u7136\u306a\u300c\u30d1\u30eb\u30b9\u300d\u3092\u3088\u308a\u53ef\u8996\u5316\u3059\u308b\u305f\u3081\u3001\u79c1\u306f\u30d4\u30fc\u30af\u3092\u30c7\u30d7\u30ed\u30a4\u30e1\u30f3\u30c8\u307e\u305f\u306fTTL\u30b7\u30fc\u30b1\u30f3\u30b9\u3068\u76f8\u95a2\u3055\u305b\u307e\u3059\u3002.<\/p>\n\n<h2>\u5b9f\u8df5\u30ac\u30a4\u30c9\u6700\u9069\u5316\u3078\u306e\u30b9\u30c6\u30c3\u30d7<\/h2>\n\n<p>\u8d77\u52d5\u3055\u305b\u308b <strong>\u30af\u30a4\u30f3<\/strong> BIND\/Unbound\u3067PSL+1\u3092\u8a2d\u5b9a\u3057\u3001\u6700\u5927\u30af\u30a8\u30ea\u6df1\u5ea6\u3092\u6ce8\u610f\u6df1\u304f\u5236\u9650\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3001\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u3001\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\u3001Aggressive NSEC\/NSEC3 (RFC 8198)\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u30ea\u30ea\u30fc\u30b9\u306e\u524d\u306bTTL\u3092\u4e0b\u3052\u3001\u5408\u6210\u30af\u30a8\u30ea\u30fc\u3067\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u4e88\u71b1\u3057\u3001\u5207\u308a\u66ff\u3048\u5f8c\u306b\u518d\u3073TTL\u3092\u4e0a\u3052\u308b\u3002\u591a\u304f\u306eIPv6\u30ec\u30b3\u30fc\u30c9\u304c\u3042\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u3001\u6df1\u5ea6\u3092\u5225\u3005\u306b\u30c6\u30b9\u30c8\u3057\u3001\u518d\u8a8d\u8a3c\u3092\u30ed\u30fc\u30ab\u30eb\u30df\u30e9\u30fc\u306b\u30aa\u30d5\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3092\u72a0\u7272\u306b\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u3068\u30a8\u30e9\u30fc\u30ec\u30fc\u30c8\u3092\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u4e0b\u306b\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n<p>\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 <strong>\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af<\/strong> \u30b9\u30d7\u30ea\u30c3\u30c8\u30db\u30e9\u30a4\u30ba\u30f3\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3001CNAME\u30c1\u30a7\u30fc\u30f3\u306a\u3069\u306e\u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u306e\u305f\u3081\u306b\u3002QMIN\u304c\u884c\u304d\u8a70\u307e\u308a\u3092\u3082\u305f\u3089\u3059\u5834\u5408\u3001\u79c1\u306f\u5b9a\u7fa9\u3055\u308c\u305f\u30be\u30fc\u30f3\u306b\u30d5\u30eb\u30cd\u30fc\u30e0\u3092\u9078\u629e\u7684\u306b\u4f7f\u7528\u3059\u308b\u3002\u3053\u308c\u3089\u306e\u4f8b\u5916\u306f\u5c0f\u898f\u6a21\u3067\u691c\u8a3c\u53ef\u80fd\u3067\u3059\u3002\u5b89\u5b9a\u3057\u305f\u5f8c\u3001\u79c1\u306f\u305d\u308c\u3089\u3092\u518d\u3073\u30aa\u30d5\u306b\u3059\u308b\u3002\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u6a19\u6e96\u7d4c\u8def\u306f\u30af\u30ea\u30fc\u30f3\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u307e\u307e\u3068\u306a\u308b\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/dns_query_minimization_4782.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u8a2d\u5b9a\u4f8b\uff1aBIND\u3068Unbound<\/h2>\n<p>\u79c1\u306f\u8a2d\u5b9a\u3092\u7c21\u6f54\u3067\u691c\u8a3c\u53ef\u80fd\u306a\u3082\u306e\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u79c1\u306fBIND\u3068Unbound\u306b\u660e\u78ba\u306a\u30b9\u30a4\u30c3\u30c1\u3068\u4fdd\u5b88\u7684\u306a\u5236\u9650\u3092\u8a2d\u5b9a\u3057\u307e\u3059\uff1a<\/p>\n<pre><code># BIND\uff08\u62bd\u51fa\uff09\n\u30aa\u30d7\u30b7\u30e7\u30f3\n  qname-minimisation yes\uff1b\n  qname-minimisation-strict yes; \/\/ \u5fc5\u8981\u306a\u3089PSL+1\u30dd\u30ea\u30b7\u30fc\u306e\u305f\u3081\u306b\u7de9\u548c\u3059\u308b\n  minimal-responses yes; \/\/ \u7121\u99c4\u306e\u306a\u3044\u5fdc\u7b54\u3092\u512a\u5148\u3059\u308b\n  max-recursion-depth 10; \/\/ RFC 9156 \u306b\u5f93\u3046\u3002\n  prefetch yes; \/\/ \u4eba\u6c17\u306e\u3042\u308b\u30a8\u30f3\u30c8\u30ea\u3092\u4e8b\u524d\u306b\u66f4\u65b0\u3059\u308b\n  stale-answer-enable yes; \/\/ \u53e4\u304f\u306a\u3063\u305f\u30a8\u30f3\u30c8\u30ea\u3092\u914d\u4fe1\u3059\u308b\n  stale-answer-ttl 300; \/\/ \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u8003\u616e\u3057\u3066\u77ed\u304f\u3059\u308b\u3002\n  lame-ttl 600; \/\/ \u30e9\u30e1\u59d4\u4efb\u3092\u77ed\u304f\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\n  \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u3068TTL\u30dd\u30ea\u30b7\u30fc\u3092\u30be\u30fc\u30f3\u3054\u3068\u306b\u8abf\u6574\u3059\u308b\n};\n\n#\u30a2\u30f3\u30d0\u30a6\u30f3\u30c9\uff08\u629c\u7c8b\uff09\n\u30b5\u30fc\u30d0\u30fc\u306e\n  qname-minimisation: yes\n  qname-minimisation-strict: yes # for PSL+1 heuristics if necessary no + \u30dd\u30ea\u30b7\u30fc\n  aggressive-nsec: \u306f\u3044 # RFC 8198\n  \u30d7\u30ea\u30d5\u30a7\u30c3\u30c1: \u306f\u3044\n  prefetch-key: yes\n  serve-expired: \u306f\u3044 # RFC 8767\u306e\u3088\u3046\u306a\u52d5\u4f5c\n  serve-expired-ttl: 300\n  \u30ad\u30e3\u30c3\u30b7\u30e5\u6700\u5927-ttl: 86400\n  \u30ad\u30e3\u30c3\u30b7\u30e5\u6700\u5c0f-ttl: 60\n  msg-cache-size: 256m\n  rrset-cache-size: 512m\n  harden-below-nxdomain\uff1a\u306f\u3044\n  val-clean-additional: yes #\u30d9\u30a4\u30ea\u30c3\u30af\u30fb\u30cf\u30fc\u30c9\u30cb\u30f3\u30b0\n<\/code><\/pre>\n<p>\u4edd <strong>PSL+1<\/strong>-\u3053\u306e\u30d2\u30e5\u30fc\u30ea\u30b9\u30c6\u30a3\u30c3\u30af\u3092\u30ed\u30fc\u30ab\u30eb\u30dd\u30ea\u30b7\u30fc\u3068\u3057\u3066\u5b9f\u88c5\u3059\u308b\uff1a\u516c\u958b\u63a5\u5c3e\u8f9e\u306e\u4e0b\u3092\u5148\u306b\u6b62\u3081\u308b\u30ea\u30be\u30eb\u30d0\u30fb\u30ed\u30b8\u30c3\u30af\u3092\u8ffd\u52a0\u3057\u305f\u308a\u3001\u65e2\u77e5\u306e\u59d4\u8b72\u30dd\u30a4\u30f3\u30c8\u3092\u7279\u5225\u306b\u5b9a\u7fa9\u3057\u305f\u308a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5168\u4f53\u7684\u306a\u4fdd\u8b77\u3092\u7de9\u3081\u308b\u3053\u3068\u306a\u304f\u3001\u5236\u5fa1\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002.<\/p>\n\n<h2>\u30a8\u30c3\u30b8\u30b1\u30fc\u30b9IPv6\u3001\u30b9\u30d7\u30ea\u30c3\u30c8\u30db\u30e9\u30a4\u30ba\u30f3\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9<\/h2>\n\n<p>\u79c1\u306f\u6b21\u306e\u3053\u3068\u306b\u6ce8\u610f\u3092\u6255\u3063\u3066\u3044\u308b\u3002 <strong>\u30a2\u30a4\u30d4\u30fc\u30d6\u30a4\u30b7\u30c3\u30af\u30b9<\/strong> PTR\u30ec\u30b3\u30fc\u30c9\u306e\u30e9\u30d9\u30eb\u6570\u304c\u591a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u305f\u3081\u3001\u30af\u30a8\u30ea\u306e\u5236\u9650\u3092\u7c21\u5358\u306b\u7834\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30b9\u30d7\u30ea\u30c3\u30c8\u30db\u30e9\u30a4\u30ba\u30f3\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3067\u306f\u3001\u5185\u90e8\u30d3\u30e5\u30fc\u3068\u5916\u90e8\u30d3\u30e5\u30fc\u304c\u540c\u4e00\u306e\u30c7\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30dd\u30a4\u30f3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3067\u306f\u3001\u7a4d\u6975\u7684\u306a\u30cd\u30ac\u30c6\u30a3\u30d6\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u3088\u308a\u3001\u4e0d\u8981\u306a\u30e9\u30a6\u30f3\u30c9\u3092\u907f\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u30c1\u30a7\u30fc\u30f3\u3092\u7279\u306b\u30c6\u30b9\u30c8\u3057\u3066\u3044\u308b\u306e\u306f\u3001QMIN\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3068\u4f7f\u7528\u3057\u306a\u3044\u5834\u5408\u3067\u7570\u306a\u308b\u7d4c\u8def\u3092\u305f\u3069\u308b\u304b\u3089\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30c6\u30b9\u30c8\u306f\u3001\u5f8c\u3067\u6642\u9593\u306e\u304b\u304b\u308b\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u624b\u9593\u3092\u7701\u3044\u3066\u304f\u308c\u308b\u3002.<\/p>\n\n<p>\u79c1\u306f\u3053\u3046\u898b\u308b\u3002 <strong>\u4ee3\u8868\u56e3<\/strong>-\u3059\u3079\u3066\u306e\u6a29\u5a01\u30b5\u30fc\u30d0\u30fc\u3067NS\u30ec\u30b3\u30fc\u30c9\u3068DS\u30ec\u30b3\u30fc\u30c9\u304c\u4e00\u81f4\u3059\u308b\u3088\u3046\u306b\u3059\u308b\u3002\u4e0d\u4e00\u81f4\u306fQMIN\u306e\u30af\u30a8\u30ea\u30fc\u6570\u3092\u5897\u3084\u3057\u3001\u30a8\u30e9\u30fc\u7387\u3092\u5897\u52a0\u3055\u305b\u308b\u3002\u307e\u305f\u3001\u53e4\u3044\u30b0\u30eb\u30fc\u30ec\u30b3\u30fc\u30c9\u306f\u56de\u907f\u53ef\u80fd\u306a\u4f59\u5206\u306a\u30db\u30c3\u30d7\u306e\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u885b\u751f\u7ba1\u7406\u306f\u6bce\u65e5\u5831\u308f\u308c\u307e\u3059\u3002\u304d\u308c\u3044\u306a\u30be\u30fc\u30f3\u306f\u3001\u6700\u5c0f\u5316\u306b\u304b\u304b\u308f\u3089\u305a\u3001\u9855\u8457\u306a\u901f\u5ea6\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2026\/04\/dns-query-optimierung-3587.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u6a29\u5a01\u3042\u308b\u30b5\u30fc\u30d0\u30fc\u5fdc\u7b54\u30dd\u30ea\u30b7\u30fc\u3068\u885b\u751f<\/h2>\n<p>\u53ef\u80fd\u306a\u9650\u308a\u6a29\u5a01\u3092\u6b8b\u3059 <strong>\u30df\u30cb\u30de\u30e0<\/strong> (\u4f59\u8a08\u306a\u8ffd\u52a0\u30c7\u30fc\u30bf\u306f\u3042\u308a\u307e\u305b\u3093)\u307e\u305f\u3001\u3059\u3079\u3066\u306e\u30bb\u30ab\u30f3\u30c0\u30ea\u3067NS\/DS\u30ec\u30b3\u30fc\u30c9\u304c\u4e00\u8cab\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30be\u30fc\u30f3\u306e\u59d4\u8b72\u306b\u3064\u3044\u3066\u306f\u3001\u79c1\u306f\u6b21\u306e\u3088\u3046\u306b\u8003\u3048\u3066\u3044\u307e\u3059\u3002 <strong>\u30b0\u30eb\u30fc\u30ec\u30b3\u30fc\u30c9<\/strong> \u5909\u66f4\u983b\u5ea6\u306b\u5408\u308f\u305b\u3066TTL\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u5e83\u7bc4\u306aSVCB\/HTTPS\u306e\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3067\u306f\u3001\u30a8\u30a4\u30ea\u30a2\u30b9\u30c1\u30a7\u30fc\u30f3\u304c\u77ed\u3044\u307e\u307e\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002\u5fc5\u8981\u3067\u3042\u308c\u3070\u3001\u5916\u90e8\u6a29\u5a01\u3092\u30ed\u30fc\u30ab\u30eb\u306b\u30df\u30e9\u30fc\u30ea\u30f3\u30b0\u3057\u3066\uff08\u8aad\u307f\u53d6\u308a\u5c02\u7528\u30df\u30e9\u30fc\uff09\u3001\u30c7\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u30b9\u30c6\u30c3\u30d7\u3092\u7e70\u308a\u8fd4\u3057\u7701\u304f\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002.<\/p>\n\n<h2>\u3088\u304f\u3042\u308b\u30a8\u30e9\u30fc\u30d1\u30bf\u30fc\u30f3\u3068\u8fc5\u901f\u306a\u5bfe\u51e6\u6cd5<\/h2>\n<ul>\n  <li><strong>\u30c7\u30d7\u30ed\u30a4\u5f8c\u306e SERVFAIL \u306e\u30d2\u30f3\u30c8\uff1a<\/strong> \u305d\u306e\u591a\u304f\u306f\u3001DS\u306e\u540c\u671f\u304c\u6b20\u3051\u3066\u3044\u308b\u304b\u3001\u9069\u5207\u306a\u30b0\u30eb\u30fc\u304c\u306a\u3044\u65b0\u3057\u3044\u30c7\u30ea\u30b2\u30fc\u30b7\u30e7\u30f3\u3067\u3059\u3002\u79c1\u306f\u4ee5\u524d\u306e\u30be\u30fc\u30f3\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3057\u3001NS\/DS\/Glue\u3092\u8abf\u6574\u3057\u305f\u3082\u306e\u3092\u516c\u958b\u3057\u307e\u3059\u3002.<\/li>\n  <li><strong>\u30b3\u30fc\u30eb\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u3067P95\u306e\u30ec\u30a4\u30c6\u30f3\u30b7\u304c\u9ad8\u3044\uff1a<\/strong> \u79c1\u306f\u30d7\u30ea\u30d5\u30a7\u30c3\u30c1\uff0f\u30b5\u30fc\u30d6\u306e\u30b9\u30c6\u30fc\u30eb\u3092\u6709\u52b9\u306b\u3057\u3001\u4e00\u6642\u7684\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u30b5\u30a4\u30ba\u3092\u5897\u3084\u3057\u3001\u30db\u30c3\u30c8\u30be\u30fc\u30f3\u3092\u5408\u6210\u7684\u306b\u4e88\u71b1\u3059\u308b\u3002.<\/li>\n  <li><strong>\u30ea\u30c8\u30e9\u30a4\u56de\u6570\/UDP\u2192TCP\uff1a<\/strong> EDNS\u30d0\u30c3\u30d5\u30a1\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001MTU\u30d1\u30b9\u3092\u30c6\u30b9\u30c8\u3057\u3001TCP\/DoT\u3092\u65e9\u3081\u306b\u5207\u308a\u66ff\u3048\u3001\u30aa\u30fc\u30d0\u30fc\u30b5\u30a4\u30ba\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\uff08ANY\u3001\u30e9\u30fc\u30b8TXT\uff09\u3092\u30b9\u30ed\u30c3\u30c8\u30eb\u3059\u308b\u3002.<\/li>\n  <li><strong>\u4e88\u60f3\u5916\u306b\u6df1\u3044\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\uff1a<\/strong> CNAME\/SVCB\u30c1\u30a7\u30fc\u30f3\u3092\u6e2c\u5b9a\u3057\u3001PSL+1\u30dd\u30ea\u30b7\u30fc\u3092\u30b7\u30e3\u30fc\u30d7\u306b\u3057\u3001\u65e2\u77e5\u306e\u59d4\u4efb\u30dd\u30a4\u30f3\u30c8\u3092\u30db\u30ef\u30a4\u30c8\u30ea\u30b9\u30c8\u306b\u767b\u9332\u3059\u308b\u3002.<\/li>\n  <li><strong>QMIN\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u500b\u4eba\u60c5\u5831\u6d41\u51fa<\/strong> ECS\u306e\u7121\u52b9\u5316\u307e\u305f\u306f\u5fae\u8abf\u6574\u3001\u30b1\u30fc\u30b9\u306e\u30e9\u30f3\u30c0\u30e0\u5316\u306e\u4fdd\u6301\u3001\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u306e\u6697\u53f7\u5316\u3002.<\/li>\n<\/ul>\n\n<h2>\u77ed\u304f\u3066\u7518\u3044\uff1a\u79c1\u306e\u304a\u3059\u3059\u3081<\/h2>\n\n<p>\u983c\u308a\u306b\u3057\u3066\u3044\u308b\u306e\u306f <strong>\u30af\u30a4\u30f3<\/strong> \u305d\u308c\u306b\u30ad\u30e3\u30c3\u30b7\u30f3\u30b0\u3092\u52a0\u3048\u3001PSL+1\u3092\u8ffd\u52a0\u3057\u3001\u5236\u9650\u3092\u73fe\u5b9f\u7684\u306b\u4fdd\u3064\u3002\u30b3\u30fc\u30eb\u30c9\u30b9\u30bf\u30fc\u30c8\u306b\u306f\u4e88\u71b1\u3068\u9069\u5207\u306aTTL\u30b5\u30a4\u30af\u30eb\u3067\u5bfe\u51e6\u3059\u308b\u3002\u30bb\u30ad\u30e5\u30a2\u306a\u74b0\u5883\u3067\u306f\u3001DoT\/DoH\u3092\u4f7f\u7528\u3057\u3066\u30c8\u30e9\u30f3\u30b9\u30dd\u30fc\u30c8\u30eb\u30fc\u30c8\u3092\u6697\u53f7\u5316\u3057\u3001DNSSEC\u306b\u4f9d\u5b58\u3057\u3066\u5b8c\u5168\u6027\u3092\u78ba\u4fdd\u3059\u308b\u3002\u30af\u30a8\u30ea\u30fc\/\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u3001\u30a8\u30e9\u30fc\u7387\u3001P95\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u306b\u3064\u3044\u3066\u660e\u78ba\u306a\u3057\u304d\u3044\u5024\u3092\u8a2d\u5b9a\u3057\u3001\u76e3\u8996\u3092\u9023\u52d5\u3055\u305b\u3066\u3044\u308b\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u3068\u30b9\u30d4\u30fc\u30c9\u306e\u5f3e\u529b\u7684\u306a\u30d0\u30e9\u30f3\u30b9\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n<p>\u79c1\u306f\u30c1\u30a7\u30c3\u30af\u3059\u308b <strong>\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc<\/strong> 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