{"id":4094,"date":"2014-02-07T08:11:10","date_gmt":"2014-02-06T23:11:10","guid":{"rendered":"http:\/\/mike.md.tsukuba.ac.jp\/terui\/blog\/?p=4094"},"modified":"2021-12-27T09:33:35","modified_gmt":"2021-12-27T00:33:35","slug":"%e5%85%ac%e9%96%8bdns","status":"publish","type":"post","link":"https:\/\/nbsigh2.com\/?p=4094","title":{"rendered":"\u516c\u958bDNS"},"content":{"rendered":"

Domain Name System\uff08\u30c9\u30e1\u30a4\u30f3 \u30cd\u30fc\u30e0 \u30b7\u30b9\u30c6\u30e0\u3001DNS\uff09\u3068\u306f\u3001\u4eba\u9593\u306b\u3068\u3063\u3066\u899a\u3048\u6613\u3044\u540d\u524d\u3092\u6a5f\u68b0\u306b\u3068\u3063\u3066\u308f\u304b\u308a\u3084\u3059\u3044\u6570\u5b57\u306b\u5909\u63db\u3057\u3066\u304f\u308c\u308b\u30b7\u30b9\u30c6\u30e0\u3060\u3002\u3053\u306e\u6a5f\u80fd\u3092\u6301\u3064\u6a5f\u5668\u3092DNS\u30b5\u30fc\u30d0\u3068\u3044\u3046\u3002\u9006\u5909\u63db\u3082\u884c\u3046\u3002\u3060\u304b\u3089\u3053\u306e\u6a5f\u68b0\uff08\u30b5\u30fc\u30d0\uff09\u306bexample.com\u306eip address \u306f\uff1f\u3068\u805e\u304f\u3068123.123.123.123 \u3068\u8fd4\u4e8b\u304c\u304f\u308b\u3002\u9006\u306bip address \u3067\u805e\u304f\u3068\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u3067\u3042\u308bexample.com\u3092\u8fd4\u3057\u3066\u304f\u308c\u308b\u3002
\n\u308f\u304b\u3089\u306a\u3044\u3068\u3001\u81ea\u52d5\u7684\u306b\u3088\u308a\u4e0a\u306eDNS\u30b5\u30fc\u30d0\u306b\u805e\u304d\u306b\u884c\u3063\u3066\u8fd4\u4e8b\u3092\u304f\u308c\u308b\u3002\u305d\u3053\u3067\u3082\u308f\u304b\u3089\u306a\u3044\u3068\u3055\u3089\u306b\u4e0a\u306e\u30b5\u30fc\u30d0\u306b\u805e\u304d\u306b\u884c\u304f\u3002\u4e0a\u306e\u30b5\u30fc\u30d0\u3068\u306fm \u306e\u5834\u5408\u306fabc.example.com\u306eDNS\u30b5\u30fc\u30d0\u3067\u3001\u3055\u3089\u306b\u4e0a\u306fexample.com\u306eDNS\u30b5\u30fc\u30d0\u3001\u305d\u3053\u3067\u3082\u308f\u304b\u3089\u306a\u3044\u3068ac.jp \u306eDNS\u30b5\u30fc\u30d0\u3001\u3055\u3089\u306b\u4e0a\u306fjp\u306eDNS\u30b5\u30fc\u30d0\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308b\u3002\u305d\u306e\u4e0a\u306f\uff1f\u3068\u3044\u3046\u3068\u4e16\u754c\u4e2d\u306b\uff11\uff13\u53f0\u3042\u308b\u3002\uff11\uff13\u53f0\u3068\u3044\u3063\u3066\u3082\u8ad6\u7406\u7684\u306b\u3060\u3002\u7ba1\u7406\u3057\u3066\u3044\u308b\u306e\u306f\u307b\u3068\u3093\u3069\u304c\u7c73\u56fd\u3001\u30b9\u30a6\u30a7\u30fc\u30c7\u30f3\u3068\u30aa\u30e9\u30f3\u30c0\u3068\u65e5\u672c\u306b\uff11\u53f0\u305a\u3064\u3060\u3002
\n\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\uff08\u3042\u3093\u305f\u306e\u3053\u3068\u3060\uff09\u304c\u3053\u306e\u30da\u30fc\u30b8\u3092\u8aad\u307f\u306b\u884c\u304d\u305f\u304f\u3066URL\u3092\u30d6\u30e9\u30a6\u30b6\u3067\u5165\u529b\u3059\u308b\u3068\u307e\u305a\u4e00\u756a\u8fd1\u3044\u3059\u3050\u4e0a\u306eDNS\u30b5\u30fc\u30d0\u306bip address \u3092\u805e\u304d\u306b\u884c\u304f\u3002\u3053\u3053\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u306e\u306f\u3001\u3042\u306a\u305f\u306e\u6240\u5c5e\u3059\u308b\u30cd\u30c3\u30c8\u306eDNS\u30b5\u30fc\u30d0\u3067\u3001\u3053\u3053\u306b\u767b\u9332\u3055\u308c\u3066\u3044\u306a\u3044\u3068\u3001\u305d\u306e\u4e0a\u306e\u30b5\u30fc\u30d0\u306b\u3001\u305d\u3053\u3067\u3082\u308f\u304b\u3089\u306a\u3044\u3068\u3055\u3089\u306b\u4e0a\u306eDNS\u30b5\u30fc\u30d0\u306b\u3068\u805e\u304d\u306b\u884c\u304f\u8a33\u3060\u3002\u305d\u308c\u305e\u308c\u306eDNS\u30b5\u30fc\u30d0\u306f\u81ea\u5206\u306e\u7bc4\u56f2\u306e\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u306f\u5fc5\u305a\u767b\u9332\u3057\u3066\u3042\u308b\u3002m\u306e\u5834\u5408\u306fabc.example.com\u306eDNS\u30b5\u30fc\u30d0\u306b\u767b\u9332\u3057\u3066\u3042\u308b\u306e\u3060\u3002\u3067\u308f\u304b\u3089\u306a\u3044\u3068\u304d\u306f\u6700\u4e0a\u4f4d\u306eDNS\u30b5\u30fc\u30d0\u306b\u805e\u304f\u8a33\u3067\u3001\u6700\u4e0a\u4f4d\u306eDNS\u30b5\u30fc\u30d0\u306f jp \u3060\u3063\u305f\u3089jp\u306eDNS\u30b5\u30fc\u30d0\u306b\u3001\u305d\u3057\u3066 jp \u306e\u30b5\u30fc\u30d0\u306fcom \u3060\u3063\u305f\u3089 com\u306eDNS\u30b5\u30fc\u30d0\u306b\u3001\u3055\u3089\u306bexammple.com\u00a0\u3060\u3063\u305f\u3089example.com\u306b\u3001\u305d\u3057\u3066def.example.com\u3060\u3063\u305f\u3089def.example.com\u306eDNS\u30b5\u30fc\u30d0\u306b\u805e\u304d\u306b\u884c\u304d\u3001\u305d\u3053\u3067abc.def.example.com \u306eip address \u306f123.123.123.123 \u3060\u3068\u308f\u304b\u308b\u8a33\u3060\u3002
\n\u3053\u306e\u3088\u3046\u306aTree\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u6700\u4e0a\u4f4d\u306eDNS\u30b5\u30fc\u30d0\u3092\u30eb\u30fc\u30c8\u30b5\u30fc\u30d0\uff08\u6839\u3063\u3053\u306e\u30b5\u30fc\u30d0\uff09\u3068\u3044\u3046\u308f\u3051\u3060\u3002
\n\u3060\u308c\u304c\u3069\u3046\u8003\u3048\u305f\u3063\u3066\u3001\u4f55\u5104\u3068\u3042\u308b\u30e6\u30fc\u30b6\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u304c\u30eb\u30fc\u30c8\u30b5\u30fc\u30d0\u306b\u884c\u3063\u305f\u3089\u5927\u5909\u3060\u3002\u305f\u3044\u3066\u3044\u3001\u9014\u4e2d\u306e\u30b5\u30fc\u30d0\u304c\u3001\u3053\u308c\u307e\u3067\u554f\u3044\u5408\u308f\u305b\u306e\u3042\u3063\u305f\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u3092\u4e00\u6642\u7684\u306b\u8a18\u61b6\u3057\u3066\u3044\u308b\u3002\u3060\u304b\u3089\u30eb\u30fc\u30c8\u30b5\u30fc\u30d0\u307e\u3067\u554f\u3044\u5408\u308f\u305b\u308b\u3053\u3068\u306f\u307b\u3068\u3093\u3069\u306a\u3044\u3060\u308d\u3046\u3051\u3069\u305d\u308c\u3067\u3082\u5168\u4e16\u754c\u3092\u30ab\u30d0\u30fc\u3059\u308b\u306e\u3067\u30eb\u30fc\u30c8\u30b5\u30fc\u30d0\u306e\u8ca0\u8377\u306f\u5927\u304d\u3044\u3002
\n\u3082\u3057\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u3068ip address \u306e\u5bfe\u5fdc\u3092\u5909\u66f4\u3059\u308b\u3068\u3001\u9014\u4e2d\u306eDNS\u30b5\u30fc\u30d0\u306b\u8a18\u61b6\u3055\u308c\u3066\u3044\u308b\u6614\u306e\u540d\u524d\u304c\u306a\u304f\u306a\u3089\u306a\u3044\u9650\u308a\u6700\u65b0\u306e\u60c5\u5831\u304c\u8fd4\u3063\u3066\u3053\u306a\u3044\u3002\u3057\u3070\u3089\u304f\u6642\u9593\u304c\u305f\u3063\u3066\u8a18\u61b6\u304c\u66f4\u65b0\u3055\u308c\u306a\u3044\u3068\u9060\u65b9\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306b\u6614\u306e\u540d\u524d\u304c\u8fd4\u3063\u3066\u6765\u3066\u63a5\u7d9a\u3067\u304d\u306a\u3044\u3053\u3068\u306b\u306a\u308b\u3002\u3081\u3063\u305f\u306b\u5909\u66f4\u3067\u304d\u306a\u3044\u308f\u3051\u3060\u3002
\n\u30b9\u30de\u30db\u3092\u8cb7\u3063\u3066\u65b0\u3057\u304f\u5951\u7d04\u3057\u305f\u3068\u304d\u3001\u96fb\u8a71\u756a\u53f7\u304c\u8ab0\u304b\u304c\u4f7f\u3063\u3066\u3044\u305f\u3082\u306e\u3060\u3068\u3001\u305d\u306e\u8ab0\u304b\u306e\u77e5\u308a\u5408\u3044\u304b\u3089\u96fb\u8a71\u304c\u304f\u308b\u3053\u3068\u306b\u306a\u308b\u3002\u305d\u306e\u77e5\u308a\u5408\u3044\u306e\u96fb\u5834\u756a\u53f7\u7c3f\u304c\u66f4\u65b0\u3055\u308c\u306a\u3044\u304b\u304e\u308a\u9593\u9055\u3044\u96fb\u8a71\u306b\u306a\u308b\u308f\u3051\u3060\u3002\u3053\u308c\u3068\u540c\u3058\u3060\u3002
\n\u7ba1\u7406\u8005\u306e\u643a\u5e2f\u306e\u5834\u5408\u3001\u3082\u3089\u3063\u305f\u96fb\u8a71\u756a\u53f7\u306e\u4ee5\u524d\u306e\u6301\u3061\u4e3b\u306f\u3001\u305d\u306e\u7b4b\u306e\u4eba\u304b\u3089\u501f\u91d1\u3092\u3057\u305f\u4eba\u3060\u3063\u305f\u3089\u3057\u304f\u3001\u6016\u3044\u304a\u5144\u3055\u3093\u304b\u3089\u300c\u501f\u91d1\u3092\u4f55\u6642\u8fd4\u3059\uff1f\u300d\u3068\u3044\u3046\u8105\u3057\u306e\u96fb\u8a71\u304c\u4f55\u56de\u304b\u3042\u3063\u305f\u3002\u697d\u3057\u3093\u3060\u3088\u3002
\n\u9591\u8a71\u4f11\u984c\u3002\u3067\u3001DNS\u306b\u8a71\u3092\u3082\u3069\u3059\u3068\u30e6\u30fc\u30b6\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u304c\u6bba\u5230\u3057\u305f\u3089\u8fd4\u4e8b\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u3002\u3057\u304b\u3057\u3001\u81ea\u5206\u306e\u6240\u5c5e\u3059\u308b\u30cd\u30c3\u30c8\u306eDNS\u30b5\u30fc\u30d0\u306b\u554f\u3044\u5408\u308f\u3059\u308b\u306e\u304c\u666e\u901a\u3060\u3002\u305d\u306eDNS\u30b5\u30fc\u30d0\u306f\u305d\u306e\u30ab\u30d0\u30fc\u3059\u308b\u7bc4\u56f2\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306b\u3057\u304b\u7b54\u3048\u306a\u3044\u306e\u304c\u666e\u901a\u3060\u3002\u3088\u305d\u304b\u3089\u306e\u554f\u3044\u5408\u308f\u305b\u306b\u7b54\u3048\u3066\u3044\u3089\u308c\u306a\u3044\u304b\u3089\u306a\u3002\u3068\u3059\u308b\u3068\u3001\u81ea\u5206\u304c\u4f7f\u3063\u3066\u3044\u308bDNS\u30b5\u30fc\u30d0\u306e\u80fd\u529b\u304c\u4f4e\u304f\u3066\u3059\u3050\u904e\u8ca0\u8377\u306b\u306a\u308b\u3068\u3001URL \u00a0\u3092\u5165\u529b\u3057\u3066\u3082\u3001\u306a\u304b\u306a\u304b\u30da\u30fc\u30b8\u304c\u3067\u3066\u3053\u306a\u3044\u3002\u3060\u304b\u3089\u3068\u3044\u3063\u3066\u81ea\u7531\u306b\u4f7f\u3048\u308bDNS\u30b5\u30fc\u30d0\u306a\u3069\u3081\u3063\u305f\u306b\u306a\u3044\u304b\u3089\u3057\u3087\u3046\u304c\u306a\u3044\u3002\u3068\u3053\u308d\u304cGoogle \u304c\u63d0\u4f9b\u3057\u3066\u3044\u308b\u3088\u3046\u3067
\n8.8.8.8
\n8.8.4.4
\n\u3068\u3044\u3046ip address \u306eDNS\u30b5\u30fc\u30d0\u306f\u8ab0\u3067\u3082\u4f7f\u3063\u3066\u3044\u3044\u3002\u3042\u3063\u3061\u306e\u5927\u5b66\u306f\u30cd\u30c3\u30c8\u304c\u9045\u3044\u306e\u3067\u3001\u3053\u306egoogle\u63d0\u4f9b\u306eDNS<\/a>\u30b5\u30fc\u30d0\u306b\u5909\u66f4\u3057\u3066\u307f\u305f\u3002\u554f\u984c\u306a\u3044\u3002\u3061\u3068\u65e9\u304f\u306a\u3063\u305f\u304b\u3082\u306d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\t\t\t\t\t\t<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,3],"tags":[],"class_list":["post-4094","post","type-post","status-publish","format-standard","hentry","category-education","category-3"],"_links":{"self":[{"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/posts\/4094","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4094"}],"version-history":[{"count":1,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/posts\/4094\/revisions"}],"predecessor-version":[{"id":20849,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=\/wp\/v2\/posts\/4094\/revisions\/20849"}],"wp:attachment":[{"href":"https:\/\/nbsigh2.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbsigh2.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}