{"id":13254,"date":"2025-10-01T08:40:31","date_gmt":"2025-10-01T06:40:31","guid":{"rendered":"https:\/\/webhosting.de\/unterschied-a-record-cname-dns-eintrag-easybase\/"},"modified":"2025-10-01T08:40:31","modified_gmt":"2025-10-01T06:40:31","slug":"%e3%83%ac%e3%82%b3%e3%83%bc%e3%83%89%e3%81%ae%e9%81%95%e3%81%84-cname-dns%e3%82%a8%e3%83%b3%e3%83%88%e3%83%aa%e3%83%bc-easybase","status":"publish","type":"post","link":"https:\/\/webhosting.de\/ja\/unterschied-a-record-cname-dns-eintrag-easybase\/","title":{"rendered":"A\u30ec\u30b3\u30fc\u30c9\u3068CNAME\u306e\u9055\u3044\u3092\u7c21\u5358\u306b\u8aac\u660e"},"content":{"rendered":"<p><strong>A\u30ec\u30b3\u30fc\u30c9CNAME<\/strong> 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<strong>\u4f4f\u6240<\/strong> \u30b7\u30e7\u30fc<\/p>\n\n<h2>\u4e2d\u5fc3\u70b9<\/h2>\n\n<ul>\n  <li><strong>A\u30ec\u30b3\u30fc\u30c9<\/strong>IPv4\u30a2\u30c9\u30ec\u30b9\u3078\u306e\u30c9\u30e1\u30a4\u30f3\u306e\u76f4\u63a5\u5272\u308a\u5f53\u3066<\/li>\n  <li><strong>CNAME<\/strong>\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u304b\u3089\u5225\u306e\u30db\u30b9\u30c8\u540d\u3078\u306e\u30a8\u30a4\u30ea\u30a2\u30b9<\/li>\n  <li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9<\/strong>A\u30ec\u30b3\u30fc\u30c9\u306f\u901a\u5e38\u3088\u308a\u901f\u304f\u3001CNAME\u306f\u3088\u308a\u67d4\u8edf<\/li>\n  <li><strong>\u30a8\u30a4\u30da\u30c3\u30af\u30b9\u30fb\u30c9\u30e1\u30a4\u30f3<\/strong>\u30eb\u30fc\u30c8\u30fb\u30c9\u30e1\u30a4\u30f3\u306b\u306f\u901a\u5e38\u3001A\u30ec\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3002<\/li>\n  <li><strong>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9<\/strong>IP\u306e\u5909\u66f4\u306fA\u30ec\u30b3\u30fc\u30c9\u306e\u307f\u3067\u3001CNAME\u306f\u305d\u308c\u306b\u5f93\u3046\u3002<\/li>\n<\/ul>\n\n<h2>DNA\u306e\u7c21\u5358\u306a\u8aac\u660e<\/h2>\n\n<p>\u6bd4\u8f03\u3059\u308b <strong>DNS<\/strong> \u4eba\u306f\u540d\u524d\u3092\u8a18\u61b6\u3057\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306fIP\u3092\u8a71\u3057\u3001DNS\u306f\u305d\u306e2\u3064\u306e\u9593\u3092\u7ffb\u8a33\u3059\u308b\u3002example.de\u3092\u547c\u3073\u51fa\u3059\u3068\u3001\u30ea\u30be\u30eb\u30d0\u306f\u6a29\u5a01\u3042\u308b\u30cd\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u4e00\u81f4\u3059\u308b\u30a8\u30f3\u30c8\u30ea\u30fc\u3092\u691c\u7d22\u3057\u3001IP\u3092\u63d0\u4f9b\u3059\u308b\u3002 <strong>\u30b5\u30fc\u30d0\u30fc<\/strong> \u304c\u9001\u4fe1\u3055\u308c\u308b\u3002\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u5186\u6ed1\u306b\u9032\u3081\u308b\u305f\u3081\u306b\u3001\u30ea\u30be\u30eb\u30d0\u306f\u4e2d\u9593\u8a18\u61b6\u88c5\u7f6e\u3068\u9023\u643a\u3057\u3001\u7d50\u679c\u304c\u6709\u52b9\u3067\u3042\u308b\u671f\u9593\u3092\u898f\u5b9a\u3059\u308b\u5b9a\u7fa9\u3055\u308c\u305fTTL\u3092\u5c0a\u91cd\u3059\u308b\u3002\u30b3\u30f3\u30d1\u30af\u30c8\u306a\u5165\u9580\u66f8\u3068\u3057\u3066\u306f <a href=\"https:\/\/webhosting.de\/ja\/dns%e3%83%89%e3%83%a1%e3%82%a4%e3%83%b3%e3%83%8d%e3%83%bc%e3%83%a0%e3%82%b7%e3%82%b9%e3%83%86%e3%83%a0%e3%81%ae%e8%aa%ac%e6%98%8e\/\">DNS\u3068\u30c9\u30e1\u30a4\u30f3\u30cd\u30fc\u30e0\u30b7\u30b9\u30c6\u30e0<\/a>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u57fa\u672c\u7684\u306a\u30eb\u30fc\u30eb\u3068\u3057\u3066\u3001\u6b63\u3057\u3044DNS\u30a8\u30f3\u30c8\u30ea\u30fc\u304c\u306a\u3051\u308c\u3070\u3001\u305f\u3068\u3048\u30a6\u30a7\u30d6\u30b5\u30fc\u30d0\u30fc\u304c\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u3067\u3042\u3063\u3066\u3082\u3001\u30e6\u30fc\u30b6\u30fc\u306f\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306b\u5230\u9054\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002 <strong>\u5f97\u70b9<\/strong>.<\/p>\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\/2025\/10\/dns-vergleich-server-4582.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>A\u30ec\u30b3\u30fc\u30c9\uff1aIPv4\u30a2\u30c9\u30ec\u30b9\u3078\u306e\u76f4\u63a5\u5272\u308a\u5f53\u3066<\/h2>\n\n<p>A <strong>A\u30ec\u30b3\u30fc\u30c9<\/strong> \u306f\u30c9\u30e1\u30a4\u30f3\u3084\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092 203.0.113.10\u306e\u3088\u3046\u306a\u7279\u5b9a\u306eIPv4\u306b\u76f4\u63a5\u63a5\u7d9a\u3059\u308b\u306e\u3067\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306f \u8fc2\u56de\u3059\u308b\u3053\u3068\u306a\u304f\u76ee\u7684\u306e\u30de\u30b7\u30f3\u306b\u76f4\u63a5\u5230\u9054\u3059\u308b\u3002\u30ea\u30be\u30eb\u30d0\u306f\u901a\u5e381\u3064\u306e\u30af\u30a8\u30ea\u30fc\u3057\u304b\u5fc5\u8981\u3068\u3057\u306a\u3044\u305f\u3081\u3001\u3053\u306e\u76f4\u63a5\u6027\u306f\u901f\u5ea6\u3092\u3082\u305f\u3089\u3057\u3001\u5fdc\u7b54\u6642\u9593\u3092\u8457\u3057\u304f\u77ed\u304f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u30e1\u30a4\u30f3\u30c9\u30e1\u30a4\u30f3\u3084\u3001\u72ec\u81ea\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u3092\u6301\u3064\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3067\u306f\u3001IP\u3092\u7ba1\u7406\u3057\u3001\u5e38\u306b\u5909\u66f4\u3057\u306a\u3044\u306e\u3067\u3042\u308c\u3070\u3001A\u30ec\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 <strong>\u4e3b\u6a29<\/strong> \u3092\u4f7f\u7528\u3057\u3066\u89e3\u6c7a\u3057\u307e\u3059\u3002\u5909\u66f4\u983b\u5ea6\u306b\u5408\u308f\u305b\u3066TTL\u3092\u8a08\u753b\u3059\u308b\uff1a\u5909\u66f4\u983b\u5ea6\u304c\u5c11\u306a\u3044\u5834\u5408\u306f\u3001DNS\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u6e1b\u3089\u3059\u305f\u3081\u306bTTL\u3092\u9577\u304f\u3057\u3001\u983b\u7e41\u306b\u79fb\u52d5\u3059\u308b\u5834\u5408\u306f\u3001\u65b0\u3057\u3044IP\u304c\u3088\u308a\u901f\u304f\u666e\u53ca\u3059\u308b\u3088\u3046\u306bTTL\u3092\u77ed\u304f\u3059\u308b\u3002IPv6\u3082\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001AAAA\u30ec\u30b3\u30fc\u30c9\u3092\u8ffd\u52a0\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <strong>\u30a2\u30a4\u30d4\u30fc\u30d6\u30a4\u30d5\u30a9\u30fc<\/strong> \u3088\u308a\u3002<\/p>\n\n<h2>CNAME: \u30db\u30b9\u30c8\u540d\u3068\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u5225\u540d<\/h2>\n\n<p>A <strong>CNAME<\/strong> \u306fIP\u3092\u6307\u3059\u306e\u3067\u306f\u306a\u304f\u3001\u5225\u306e\u30db\u30b9\u30c8\u540d\u3092\u6307\u3059\u305f\u3081\u3001\u591a\u304f\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u7ba1\u7406\u3092\u7c21\u7d20\u5316\u3059\u308b\u30a8\u30a4\u30ea\u30a2\u30b9\u3068\u3057\u3066\u7406\u89e3\u3055\u308c\u307e\u3059\u3002\u4f8b: www.beispiel.de CNAME\u3068\u3057\u3066example.de\u3092\u6307\u3057\u3001\u5b9f\u969b\u306eIP\u306f\u30eb\u30fc\u30c8\u30c9\u30e1\u30a4\u30f3\u306b\u306e\u307f\u3042\u308a\u3001\u5358\u4e00\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u30dd\u30a4\u30f3\u30c8\u306e\u307e\u307e\u3067\u3059\u3002\u30b5\u30fc\u30d0IP\u304c\u5909\u66f4\u3055\u308c\u305f\u5834\u5408\u3001\u30e1\u30a4\u30f3\u30c9\u30e1\u30a4\u30f3\u306eA\u30ec\u30b3\u30fc\u30c9\u3092\u8abf\u6574\u3059\u308b\u3060\u3051\u3067\u3001\u4f9d\u5b58\u3059\u308b\u3059\u3079\u3066\u306eCNAME\u306f\u81ea\u52d5\u7684\u306b\u65b0\u3057\u3044 <strong>\u30b4\u30fc\u30eb<\/strong>.\u7279\u306b\u8907\u6570\u306e\u30b5\u30fc\u30d3\u30b9\u304c\u540c\u3058\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u79c1\u306f\u3053\u306e\u65b9\u6cd5\u3067\u30d6\u30ed\u30b0\u3001\u30b7\u30e7\u30c3\u30d7\u3001\u30a2\u30d7\u30ea\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u7121\u99c4\u306a\u304f\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3057\u3066\u3044\u308b\u3002\u307e\u305f\u3001cdn.provider.net\u306e\u3088\u3046\u306a\u5916\u90e8\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u3082\u3053\u306e\u65b9\u6cd5\u3067\u63a5\u7d9a\u3057\u3066\u3044\u308b\u3002 <strong>\u30de\u30b9\u30c8<\/strong>.<\/p>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/10\/dns_a_vs_cname_4892.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u76f4\u63a5\u6bd4\u8f03\uff1a\u7279\u6027\u3001\u6027\u80fd\u3001\u4f7f\u7528<\/h2>\n\n<p>\u3069\u3061\u3089\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u30bf\u30a4\u30d7\u3082\u660e\u78ba\u306a\u30bf\u30b9\u30af\u3092\u3053\u306a\u3059\u304c\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u3001\u89e3\u50cf\u5ea6\u3001\u4f7f\u7528\u7126\u70b9\u306e\u70b9\u3067\u9055\u3044\u304c\u3042\u308a\u3001\u65e5\u5e38\u696d\u52d9\u3067\u6c17\u3065\u304f\u3060\u308d\u3046\u3002\u30a8\u30a4\u30da\u30c3\u30af\u30b9\u30fb\u30c9\u30e1\u30a4\u30f3\u3067\u306f\u3001\u901a\u5e38 <strong>A\u30ec\u30b3\u30fc\u30c9<\/strong>\u306a\u305c\u306a\u3089\u3001MX\u306e\u3088\u3046\u306a\u96fb\u5b50\u30e1\u30fc\u30eb\u30a8\u30f3\u30c8\u30ea\u306f\u4e26\u5217\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u305a\u3001CNAME\u306f\u305d\u3053\u3067\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u304b\u3089\u3067\u3042\u308b\u3002\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u5834\u5408\u3001CNAME\u306f\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u624b\u9593\u3092\u6e1b\u3089\u3057\u3001\u7279\u306b\u5927\u898f\u6a21\u306a\u74b0\u5883\u3067\u306f\u8a2d\u5b9a\u3092\u660e\u78ba\u306b\u4fdd\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u3001\u3088\u308a\u9b45\u529b\u7684\u3067\u3042\u308b\u3002\u30ec\u30b9\u30dd\u30f3\u30b9\u30bf\u30a4\u30e0\u306e\u70b9\u3067\u306f\u3001A\u30ec\u30b3\u30fc\u30c9\u306f\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u3067\u5341\u5206\u3067\u3042\u308b\u306e\u306b\u5bfe\u3057\u3001CNAME\u306f\u5c11\u306a\u304f\u3068\u30821\u3064\u306e\u8ffd\u52a0\u30b9\u30c6\u30c3\u30d7\u3092\u5fc5\u8981\u3068\u3059\u308b\u305f\u3081\u52a0\u70b9\u3068\u306a\u308b\u3002\u6b21\u306e\u8868\u306f\u30b3\u30a2\u30c7\u30fc\u30bf\u3092\u8981\u7d04\u3057\u305f\u3082\u306e\u3067\u3001\u76ee\u7684\u306b\u5fdc\u3058\u3066\u610f\u56f3\u7684\u306b\u4e21\u65b9\u3092\u4f7f\u7528\u3059\u308b\u7406\u7531\u3092\u793a\u3057\u3066\u3044\u308b\u3002 <strong>\u30df\u30c3\u30af\u30b9<\/strong>:<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u7279\u5fb4<\/th>\n      <th>A\u30ec\u30b3\u30fc\u30c9<\/th>\n      <th>CNAME<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u30bf\u30fc\u30b2\u30c3\u30c8\u30fb\u30bf\u30a4\u30d7<\/td>\n      <td><strong>\u30a2\u30a4\u30d4\u30fc\u30a2\u30c9\u30ec\u30b9<\/strong> (IPv4)<\/td>\n      <td><strong>\u30db\u30b9\u30c8\u540d<\/strong> (\u5225\u540d)<\/td>\n    <\/tr>\n    <tr>\n      <td>\u6c7a\u8b70<\/td>\n      <td>\u307b\u3068\u3093\u30691\u30eb\u30c3\u30af\u30a2\u30c3\u30d7<\/td>\n      <td>\u5c11\u306a\u304f\u3068\u30822\u3064\u306e\u30eb\u30c3\u30af\u30a2\u30c3\u30d7<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30e1\u30a4\u30f3\u30fb\u30c9\u30e1\u30a4\u30f3\uff08\u30a8\u30a4\u30da\u30c3\u30af\u30b9\uff09<\/td>\n      <td>\u3075\u3055\u308f\u3057\u3044<\/td>\n      <td>MX\u306b\u554f\u984c\u304c\u3042\u308b<\/td>\n    <\/tr>\n    <tr>\n      <td>IP\u5909\u66f4\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9<\/td>\n      <td>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u3059\u3079\u3066\u306eA\u30ec\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u3059\u308b<\/td>\n      <td>\u5b9b\u5148\u306fA\u30ec\u30b3\u30fc\u30c9\u306e\u307f\u3001CNAME\u306f\u305d\u308c\u306b\u5f93\u3046<\/td>\n    <\/tr>\n    <tr>\n      <td>\u5fdc\u52df\u8981\u9805<\/td>\n      <td>\u30bd\u30ea\u30c3\u30c9\u3060\u3001 <strong>\u30af\u30ea\u30c6\u30a3\u30ab\u30eb<\/strong> \u76ee\u6a19<\/td>\n      <td>\u591a\u6570\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3001\u5916\u90e8\u30b5\u30fc\u30d3\u30b9<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n<h2>\u5b9f\u8df5\uff1a\u30af\u30ea\u30fc\u30f3\u306a\u30b3\u30f3\u30d5\u30a3\u30ae\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u4f8b<\/h2>\n\n<p>\u65b0\u3057\u3044\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u307e\u305aApex\u30c9\u30e1\u30a4\u30f3\u3092\u660e\u78ba\u306b\u5206\u96e2\u3057\u307e\u3059\u3002 <strong>A\u30ec\u30b3\u30fc\u30c9<\/strong>www\u306fCNAME\u7d4c\u7531\u3067Apex\u3092\u6307\u3057\u3001\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3055\u3089\u306b\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u304c\u7d9a\u304d\u307e\u3059\u3002\u30b7\u30e7\u30c3\u30d7\u304cSaaS\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u6307\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u79c1\u306fshop.example.net\u3078\u306eCNAME\u3068\u3057\u3066shop.yourdomain.com\u3092\u8a2d\u5b9a\u3057\u3001\u305d\u306e\u5f8c\u306e\u5909\u66f4\u304cIP\u306e\u77e5\u8b58\u306a\u3057\u3067\u6a5f\u80fd\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u308b\u3002monitor.deinedomain.de\u306e\u3088\u3046\u306a\u72ec\u81ea\u306e\u30de\u30b7\u30f3\u3092\u6301\u3064\u5185\u90e8\u30c4\u30fc\u30eb\u306b\u3064\u3044\u3066\u306f\u3001\u79c1\u306f\u610f\u8b58\u7684\u306bIP\u3092\u5236\u5fa1\u3057\u3001\u76f4\u63a5\u89e3\u6c7a\u3092\u597d\u3080\u306e\u3067\u3001A\u30ec\u30b3\u30fc\u30c9\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u30df\u30cb\u30de\u30c8\u30ea\u30af\u30b9\u306f\u3001\u305d\u306e\u9055\u3044\u3092\u5177\u4f53\u7684\u306b\u3057\u3001CNAME\u304c\u5927\u898f\u6a21\u306a\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u306b\u304a\u3044\u3066\u3044\u304b\u306b\u67d4\u8edf\u3067\u3042\u308b\u304b\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u304c\u79c1\u306eDNS\u7ba1\u7406\u65b9\u6cd5\u3067\u3059\u3002 <strong>\u30af\u30ea\u30a2<\/strong> \u305d\u3057\u3066\u624b\u5fdc\u3048\u304c\u3042\u308b\uff1a<\/p>\n\n<table>\n  <thead>\n    <tr>\n      <th>\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3<\/th>\n      <th>\u30bf\u30a4\u30d7<\/th>\n      <th>\u30b4\u30fc\u30eb<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>www<\/td>\n      <td>CNAME<\/td>\n      <td>example.com<\/td>\n    <\/tr>\n    <tr>\n      <td>\u30d6\u30ed\u30b0<\/td>\n      <td>CNAME<\/td>\n      <td>example.com<\/td>\n    <\/tr>\n    <tr>\n      <td>\u5e97<\/td>\n      <td>CNAME<\/td>\n      <td>\u30b7\u30e7\u30c3\u30d7\u30a8\u30af\u30b9\u30bf\u30fc\u30ca\u30eb\u30c9\u30c3\u30c8\u30b3\u30e0<\/td>\n    <\/tr>\n    <tr>\n      <td>example.com<\/td>\n      <td>A\u30ec\u30b3\u30fc\u30c9<\/td>\n      <td>192.0.2.10<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\n\n\n<figure class=\"wp-block-image size-full is-resized\">\n  <img decoding=\"async\" src=\"https:\/\/webhosting.de\/wp-content\/uploads\/2025\/10\/a-record-vs-cname-vergleich-8291.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>TTL\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3001CNAME\u30c1\u30a7\u30fc\u30f3<\/h2>\n\n<p>\u4edd <strong>TTL<\/strong> (Time to Live\uff09\u306f\u3001\u30ea\u30be\u30eb\u30d0\u304c\u5fdc\u7b54\u3092\u30ad\u30e3\u30c3\u30b7\u30e5\u3059\u308b\u6642\u9593\u306b\u5f71\u97ff\u3057\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u9069\u6642\u6027\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u3059\u3002\u9759\u7684\u30bf\u30fc\u30b2\u30c3\u30c8\u306e\u5834\u5408\u3001DNS\u30af\u30a8\u30ea\u306e\u56de\u6570\u3092\u6e1b\u3089\u3059\u305f\u3081\u306b\u9577\u3044TTL\u3092\u4f7f\u7528\u3057\u3001\u8a08\u753b\u7684\u306a\u79fb\u8ee2\u306e\u524d\u306b\u306f\u65e9\u3081\u306bTTL\u3092\u4e0b\u3052\u3066\u3001\u5909\u66f4\u304c\u4e16\u754c\u4e2d\u306b\u7d20\u65e9\u304f\u5c4a\u304f\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002CNAME\u306b\u3064\u3044\u3066\u306f\u3001\u30c1\u30a7\u30fc\u30f3\u304c\u5897\u3048\u308b\u3054\u3068\u306b\u89e3\u6c7a\u56de\u6570\u304c\u5897\u3048\u308b\u305f\u3081\u3001\u30c1\u30a7\u30fc\u30f3\u3092\u77ed\u304f\u4fdd\u3061\u3001\u30a8\u30a4\u30ea\u30a2\u30b9\u30d1\u30b9\u3092\u5b9a\u671f\u7684\u306b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u30eb\u30fc\u30d7\u3092\u4f5c\u3089\u306a\u3044\u3088\u3046\u306b\u3057\u3001\u6700\u7d42\u76ee\u7684\u5730\u304c\u5b9f\u969b\u306bA\u307e\u305f\u306fAAAA\u30ec\u30b3\u30fc\u30c9\u3067\u89e3\u6c7a\u3067\u304d\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002 <strong>\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8<\/strong> \u306b\u5230\u9054\u3067\u304d\u306a\u3044\u3002dig\u3084nslookup\u306e\u3088\u3046\u306a\u30c4\u30fc\u30eb\u3067\u5909\u66f4\u3092\u30c6\u30b9\u30c8\u3057\u3001\u5fdc\u7b54\u6642\u9593\u3092\u89b3\u5bdf\u3057\u3001\u30ea\u30be\u30eb\u30d0\u304c\u671f\u5f85\u3055\u308c\u308bTTL\u3092\u5c0a\u91cd\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002<\/p>\n\n<h2>AAAA\u30ec\u30b3\u30fc\u30c9\u3068IPv6: \u4e8c\u91cd\u306e\u30a2\u30af\u30bb\u30b9\u3001\u30af\u30ea\u30fc\u30f3\u306a\u512a\u5148\u9806\u4f4d\u4ed8\u3051<\/h2>\n\n<p>A\u30ec\u30b3\u30fc\u30c9\u306b\u52a0\u3048\u3066\u3001\u79c1\u306f\u4e00\u8cab\u3057\u3066\u6b21\u306e\u3082\u306e\u3092\u4f7f\u3063\u3066\u3044\u308b\u3002 <strong>AAAA\u30ec\u30b3\u30fc\u30c9<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304cIPv6\u7d4c\u7531\u3067\u3082\u63a5\u7d9a\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u305f\u3081\u3060\u3002\u6700\u8fd1\u306e\u30b9\u30bf\u30c3\u30af\u306f \"happy eyeballs \"\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u3001\u81ea\u52d5\u7684\u306b\u901f\u3044\u30d1\u30b9\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u91cd\u8981\uff1a\u30b5\u30fc\u30d3\u30b9\u304cIPv6\u3067\u5b8c\u5168\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u5834\u5408\uff08\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3001TLS\u8a3c\u660e\u66f8\u3001VirtualHost\/SNI\uff09\u3060\u3051AAAA\u30ec\u30b3\u30fc\u30c9\u3092\u767a\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002IPv6\u30d1\u30b9\u304c\u58ca\u308c\u3066\u3044\u308b\u3068\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u79c1\u306fA\u3068AAAA\u306eTTL\u3092\u540c\u4e00\u306b\u4fdd\u3061\u3001\u4e21\u65b9\u306e\u30d1\u30b9\u304c\u540c\u671f\u3057\u3066\u8001\u5316\u3059\u308b\u3088\u3046\u306b\u3057\u3001\u5fdc\u7b54\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u5b9a\u671f\u7684\u306bdig AAAA\u3067\u30c1\u30a7\u30c3\u30af\u3057\u307e\u3059\u3002<\/p>\n\n<h2>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9: \u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u306e\u4f7f\u7528\u65b9\u6cd5<\/h2>\n\n<p>\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u30a8\u30f3\u30c8\u30ea\u30fc(*.yourdomain.com)\u3092\u4f7f\u3048\u3070\u3001\u672a\u77e5\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3092\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u79c1\u306f\u901a\u5e38 <strong>CNAME<\/strong> \u307e\u305f\u306f\u30e9\u30f3\u30c7\u30a3\u30f3\u30b0\u30da\u30fc\u30b8\u3078\u306eA\u30ec\u30b3\u30fc\u30c9\u3002\u512a\u5148\u9806\u4f4d\u306b\u6ce8\u610f\uff1a\u660e\u793a\u7684\u306a\u30a8\u30f3\u30c8\u30ea\u30fc\u306f\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u6253\u3061\u8ca0\u304b\u3059\u3002\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9MX\u3084\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9NS\u306f\u3001\u610f\u56f3\u305b\u305a\u306b\u30e1\u30fc\u30eb\u3084\u30be\u30fc\u30f3\u306e\u69cb\u9020\u3092\u5909\u3048\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308b\u306e\u3067\u907f\u3051\u307e\u3057\u3087\u3046\u3002\u3069\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u304c\u30d7\u30ec\u30fc\u30b9\u30db\u30eb\u30c0\u3092\u4ecb\u3057\u3066\u5b9f\u969b\u306b\u89e3\u6c7a\u3055\u308c\u308b\u304b\u304c\u308f\u304b\u308b\u3088\u3046\u306b\u3001\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u900f\u904e\u7684\u306b\u6587\u66f8\u5316\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n<h2>\u8907\u6570\u306eA\u30ec\u30b3\u30fc\u30c9\uff1a\u30e9\u30a6\u30f3\u30c9\u30ed\u30d3\u30f3\u3068\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\u3092\u6b63\u3057\u304f\u8a55\u4fa1\u3059\u308b<\/h2>\n\n<p>\u8907\u6570\u7740\u7528\u306e\u5834\u5408 <strong>A\u30ec\u30b3\u30fc\u30c9<\/strong> \u540c\u3058\u30e9\u30d9\u30eb\u306b\u5bfe\u3057\u3066\u3001\u30ea\u30be\u30eb\u30d0\u306f\u3057\u3070\u3057\u3070\u5fdc\u7b54\u3092\u30e9\u30a6\u30f3\u30c9\u30ed\u30d3\u30f3\u3067 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<strong>\u30a8\u30a4\u30da\u30c3\u30af\u30b9<\/strong>-A\u307e\u305f\u306fAAAA\u30ec\u30b3\u30fc\u30c9\u306b\u52a0\u3048\u3066\u3001\u96fb\u5b50\u30e1\u30fc\u30eb\u306eMX\u3001SPF\u306eTXT\u3001\u6642\u306b\u306fSRV\u306e\u3088\u3046\u306a\u4ed6\u306e\u30a8\u30f3\u30c8\u30ea\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u304c\u591a\u304f\u3001CNAME\u304c\u7af6\u5408\u3092\u5f15\u304d\u8d77\u3053\u3059\u7406\u7531\u3067\u3042\u308b\u3002\u30d7\u30ed\u30d0\u30a4\u30c0\u306b\u3088\u3063\u3066\u306f\u3001\u3044\u308f\u3086\u308bALIAS\u307e\u305f\u306fANAME\u30bf\u30a4\u30d7\u3092\u63d0\u4f9b\u3057\u3066\u304a\u308a\u3001\u9802\u70b9\u3067\u306fCNAME\u3068\u540c\u69d8\u306b\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001\u30ea\u30be\u30eb\u30d0\u306bIP\u3092\u63d0\u793a\u3059\u308b\u305f\u3081\u3001\u4e26\u5217\u30a8\u30f3\u30c8\u30ea\u304c\u5e72\u6e09\u305b\u305a\u306b\u5b58\u5728\u3057\u307e\u3059\u3002\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u3053\u308c\u3092\u63d0\u4f9b\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001\u30a8\u30a4\u30da\u30c3\u30af\u30b9\u3067\u306fA\u30ec\u30b3\u30fc\u30c9\u3068AAAA\u30ec\u30b3\u30fc\u30c9\u306b\u3053\u3060\u308f\u308a\u3001\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3067\u306fCNAME\u306e\u307f\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30bb\u30c3\u30c8\u30a2\u30c3\u30d7\u3092\u5b89\u5b9a\u3055\u305b\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u306e\u624b\u9593\u3092\u7701\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30e1\u30fc\u30eb\u914d\u4fe1\u306b\u3064\u3044\u3066\u306f\u3001MX\u304c\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3001SPF\u3001DKIM\u3001DMARC\u304c\u5b8c\u4e86\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u5e38\u306b\u30c1\u30a7\u30c3\u30af\u3057\u3001\u914d\u4fe1\u3068\u30ec\u30d4\u30e5\u30c6\u30fc\u30b7\u30e7\u30f3\u304c\u6b63\u3057\u304f\u884c\u308f\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u7d44\u7e54\u306b\u3088\u308a\u3001\u30a6\u30a7\u30d6\u3068\u30e1\u30fc\u30eb\u304c\u78ba\u5b9f\u306b\u9023\u52d5\u3059\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u9069\u5207\u306a <strong>\u5834\u6240<\/strong> \u5909\u66f4\u3059\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\/2025\/10\/dns_a_cname_techoffice_9247.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>E\u30e1\u30fc\u30eb\u3001MX\u3001CNAME\uff1a\u30c8\u30e9\u30d6\u30eb\u3092\u9632\u3050\u30eb\u30fc\u30eb<\/h2>\n\n<p>\u79c1\u306f2\u3064\u306e\u539f\u5247\u3092\u5b88\u3063\u3066\u3044\u308b\u3002 <strong>CNAME\u306a\u3057<\/strong> (\u300cCNAME\u3068\u4ed6\u306e\u30c7\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u306a\u3044\u300d\u898f\u5247)\u30022) MX\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u30db\u30b9\u30c8\u540d\u306f\u3001\u7406\u60f3\u7684\u306b\u306fCNAME\u3067\u306f\u306a\u304fA\/AAAA\u3092\u76f4\u63a5\u6307\u3059\u3079\u304d\u3067\u3042\u308b\u3002DKIM\u3067\u306f\u3001\u30d9\u30f3\u30c0\u30fc\u30bb\u30ec\u30af\u30bf\u306bCNAME\u3092\u4f7f\u3046\u306e\u304c\u597d\u304d\u3067\u3059\u3002\u30bb\u30ec\u30af\u30bf\u30e9\u30d9\u30eb\u306b\u306fCNAME\u3060\u3051\u304c\u5b58\u5728\u3057\u3001\u9069\u5207\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3089\u3067\u3059\u3002\u914d\u4fe1\u305d\u306e\u3082\u306e\u306b\u3064\u3044\u3066\u306f\u3001\u30e1\u30fc\u30eb\u30db\u30b9\u30c8\uff08mail.deinedomain.de\u306a\u3069\uff09\u306b\u5c02\u7528\u306eA\/AAA\u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u3001TXT\u7d4c\u7531\u3067SPF\u3001DKIM\u3001DMARC\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u3067\u3001\u30e1\u30fc\u30eb\u30d5\u30ed\u30fc\u3092\u5805\u7262\u306b\u4fdd\u3064\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<h2>\u843d\u3068\u3057\u7a74\uff1a\u5178\u578b\u7684\u306a\u30df\u30b9\u306b\u7d20\u65e9\u304f\u6c17\u3065\u304f<\/h2>\n\n<p>\u6700\u3082\u983b\u7e41\u306b\u8d77\u3053\u308b\u554f\u984c\u306f\u3001\u9577\u3059\u304e\u308b\u3053\u3068\u3060\u3002 <strong>CNAME<\/strong>-\u30a8\u30a4\u30da\u30c3\u30af\u30b9\u30c9\u30e1\u30a4\u30f3\u306e\u30c1\u30a7\u30fc\u30f3\u3001\u30a8\u30a4\u30ea\u30a2\u30b9\u30eb\u30fc\u30d7\u3001CNAME\u306f\u3001MX\u304c\u3059\u3067\u306b\u5b58\u5728\u3057\u3001\u7af6\u5408\u3092\u5f15\u304d\u8d77\u3053\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u3001\u79c1\u306f\u30be\u30fc\u30f3\u30d5\u30a1\u30a4\u30eb\u3092\u4e0a\u304b\u3089\u4e0b\u307e\u3067\u30c1\u30a7\u30c3\u30af\u3057\u3001\u30c1\u30a7\u30fc\u30f3\u3092\u6700\u5c0f\u9650\u306b\u6e1b\u3089\u3057\u3001\u4ed6\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u304c\u5fc5\u8981\u306a\u3068\u3053\u308d\u306bA\u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002www\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3068apex\u306e\u9806\u756a\u3092\u9593\u9055\u3048\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3002\u307e\u305f\u3001\u4e16\u754c\u4e2d\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u304cTTL\u306b\u5fdc\u3058\u3066\u65b0\u3057\u3044\u5024\u3092\u8868\u793a\u3059\u308b\u306e\u306b\u6642\u9593\u304c\u304b\u304b\u308b\u305f\u3081\u3001\u5909\u66f4\u5f8c\u306e\u30d7\u30ed\u30d1\u30b2\u30fc\u30b7\u30e7\u30f3\u3082\u76e3\u8996\u3059\u308b\u3053\u3068\u3002\u69cb\u9020\u5316\u3055\u308c\u305f\u30e2\u30cb\u30bf\u30ea\u30f3\u30b0\u306f\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u624b\u9593\u3092\u7701\u304d\u3001\u3042\u306a\u305f\u306e <strong>\u6765\u5834\u8005<\/strong> \u76ee\u7684\u5730\u306b\u78ba\u5b9f\u306b\u5230\u9054\u3059\u308b\u3002<\/p>\n\n<h2>\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3068\u3068\u3082\u306b\u5909\u66f4\u3092\u30af\u30ea\u30fc\u30f3\u306b\u5b9f\u884c\u3059\u308b<\/h2>\n\n<p>DNS\u30ec\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u3059\u308b\u524d\u306b\u3001\u6b21\u306e\u3088\u3046\u306b\u3057\u307e\u3059\u3002 <strong>TTL<\/strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u3092\u5f85\u3063\u3066\u304b\u3089\u65b0\u3057\u3044\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001\u30e6\u30fc\u30b6\u306f\u65b0\u9bae\u306a\u30c7\u30fc\u30bf\u3092\u7d20\u65e9\u304f\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4e00\u822c\u7684\u306a\u30db\u30b9\u30c8\u306eA\u3001AAAA\u3001CNAME\u3001MX\u3001TXT\u3001SRV\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u6301\u3064\u660e\u78ba\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u3042\u308a\u3001\u4e88\u6e2c\u53ef\u80fd\u306a\u51e6\u7406\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002\u5177\u4f53\u7684\u306a\u4f8b\u3092\u3054\u89a7\u306b\u306a\u308a\u305f\u3044\u5834\u5408\u306f\u3001\u30b3\u30f3\u30d1\u30af\u30c8\u306a <a href=\"https:\/\/webhosting.de\/ja\/dns%e8%a8%ad%e5%ae%9a%e3%82%a4%e3%82%aa%e3%83%8e%e3%82%b9%e3%82%ac%e3%82%a4%e3%83%89\/\">DNS\u8a2d\u5b9a\u30ac\u30a4\u30c9<\/a>\u3053\u308c\u306f\u5165\u529b\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u5178\u578b\u7684\u306a\u7d44\u307f\u5408\u308f\u305b\u3092\u793a\u3057\u3066\u3044\u308b\u3002\u4fdd\u5b58\u5f8c\u3001\u79c1\u306fdig\/nslookup\u3092\u4f7f\u3063\u3066\u7b54\u3048\u3068TTL\u304c\u6b63\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u3044\u304f\u3064\u304b\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7d4c\u7531\u3067\u30a6\u30a7\u30d6\u3068\u96fb\u5b50\u30e1\u30fc\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u30c6\u30b9\u30c8\u3059\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u5909\u66f4\u304c\u4e88\u671f\u305b\u306c\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3055\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u3044\u308b\u3002 <strong>\u30ae\u30e3\u30c3\u30d7<\/strong> \u3092\u6b8b\u3059\u3002<\/p>\n\n<h2>\u8a3a\u65ad\u306e\u5b9f\u969b\uff1adig\u3068nslookup\u306e\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n<p>\u8fc5\u901f\u306a\u30c1\u30a7\u30c3\u30af\u306b\u306f\u30af\u30ea\u30a2\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u3063\u3066\u3044\u308b\u3002\u305d\u3057\u3066 <strong>\u30c7\u30a3\u30b0\uff0b\u30c8\u30ec\u30fc\u30b9<\/strong> \u3092\u4f7f\u3048\u3070\u3001\u6a29\u5a01\u30b5\u30fc\u30d0\u307e\u3067\u306e\u89e3\u6c7a\u30c1\u30a7\u30fc\u30f3\u5168\u4f53\u3092\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002CNAME\u30c1\u30a7\u30fc\u30f3\u3084\u59d4\u4efb\u306e\u554f\u984c\u3092\u8996\u899a\u5316\u3059\u308b\u306e\u306b\u7406\u60f3\u7684\u3067\u3059\u3002\u3068 <strong>dig www.deinedomain.de A +ttlunits<\/strong> \u30ea\u30be\u30eb\u30d0\u304c\u5b9f\u969b\u306b\u3069\u306eTTL\u3092\u8fd4\u3059\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002\u305d\u3057\u3066 <strong>dig cname.ziel.tld CNAME<\/strong> \u3092\u4f7f\u3048\u3070\u3001\u30a8\u30a4\u30ea\u30a2\u30b9\u304c\u89e3\u6c7a\u53ef\u80fd\u306a\u30bf\u30fc\u30b2\u30c3\u30c8\u3092\u6307\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u8a8d\u8b58\u3067\u304d\u308b\u3002IPv6\u3092\u5fd8\u308c\u306a\u3044\u3088\u3046\u306b\u3001AAAA\u3067\u30c6\u30b9\u30c8\u3059\u308b\u3053\u3068\u3082\u91cd\u8981\u3067\u3042\u308b\u3002Windows\u3067\u306f <strong>\u30a8\u30cc\u30a8\u30b9\u30eb\u30c3\u30af\u30a2\u30c3\u30d7<\/strong> \u30b5\u30fc\u30d0\u30fc\u30928.8.8.8\u307e\u305f\u306f1.1.1.1\u306b\u8a2d\u5b9a\u3057\u3066\u3001\u72ec\u7acb\u3057\u305f\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u53d6\u5f97\u3057\u3001\u30ed\u30fc\u30ab\u30eb\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u9664\u5916\u3057\u305f\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\/2025\/10\/dns-vergleich-schreibtisch-4521.png\" alt=\"\" width=\"1536\" height=\"1024\"\/>\n<\/figure>\n\n\n<h2>\u8a3c\u660e\u66f8\u3068CNAME\uff1a\u30d6\u30e9\u30a6\u30b6\u304c\u5b9f\u969b\u306b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3082\u306e<\/h2>\n\n<p>\u30db\u30b9\u30c8\u540d\u304cCNAME\u3067\u7570\u306a\u308b\u5b9b\u5148\u3092\u6307\u3057\u3066\u3044\u3066\u3082\u3001\u30d6\u30e9\u30a6\u30b6\u306f <strong>\u8a3c\u660e\u66f8<\/strong> \u306f\u5e38\u306b\u3001\u5143\u3005\u547c\u3073\u51fa\u3055\u308c\u305f\u540d\u524d\u306b\u5bfe\u3059 \u308b\u3082\u306e\u3067\u3042\u308b\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u8a3c\u660e\u66f8\u306b\u306f\u3001\u5fc5\u305a\u3057\u3082\u30bf\u30fc\u30b2\u30c3\u30c8\u30db\u30b9\u30c8\u3067\u306f\u306a\u304f\u3001\u30a8\u30a4\u30ea\u30a2\u30b9\u540d\uff08SAN\/CN\uff09\u3092\u542b\u3081\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u79c1\u306f\u81ea\u52d5\u5316\u306e\u305f\u3081\u306bDNS-01\u30c1\u30e3\u30ec\u30f3\u30b8\u3092\u3088\u304f\u4f7f\u7528\u3059\u308b\u3002 <em>\u30a2\u30af\u30e1\u30fb\u30c1\u30e3\u30ec\u30f3\u30b8<\/em> \u306f\u3001\u79c1\u304c\u624b\u52d5\u3067TXT\u30ec\u30b3\u30fc\u30c9\u3092\u8abf\u6574\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u691c\u8a3c\u3092\u7ba1\u7406\u3059\u308b\u30d7\u30ed\u30d0\u30a4\u30c0\u306bCNAME\u3092\u4ecb\u3057\u3066\u59d4\u8b72\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002CNAME\u304c\u6b63\u3057\u304f\u89e3\u6c7a\u3055\u308c\u3001\u540c\u3058\u30e9\u30d9\u30eb\u306b\u4e26\u5217\u30ec\u30b3\u30fc\u30c9\u304c\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<h2>CDN\u3068SaaS\u306e\u7d71\u5408\uff1a\u30db\u30b9\u30c8\u30d8\u30c3\u30c0\u30fc\u3068Apex\u6226\u7565<\/h2>\n\n<p>CDN\u3084SaaS\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002 <strong>\u30db\u30b9\u30c8\u30d8\u30c3\u30c0<\/strong> \u91cd\u8981\uff1a\u30bf\u30fc\u30b2\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u306f\u3001CNAME\u7d4c\u7531\u3067\u5225\u306e\u30db\u30b9\u30c8\u540d\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\u3067\u3082\u3001HTTP\u30d8\u30c3\u30c0\u30fc\u306b\u5143\u306e\u30c9\u30e1\u30a4\u30f3\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u671f\u5f85\u3057\u307e\u3059\u3002\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u304c\u30db\u30b9\u30c8\u540d\u306bTLS\u3092\u542b\u3080 \"\u30ab\u30b9\u30bf\u30e0\u30c9\u30e1\u30a4\u30f3 \"\u3092\u4fdd\u5b58\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002ALIAS\/ANAME\u306e\u306a\u3044Apex\u30c9\u30e1\u30a4\u30f3\u306e\u5834\u5408\u3001\u79c1\u306fwww\u3078\u306e301\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3067\u4f5c\u696d\u3057\u3001CNAME\u3068\u3057\u3066CDN\u3092\u30dd\u30a4\u30f3\u30c8\u3057\u307e\u3059\u3002<\/p>\n\n<h2>\u30b9\u30d7\u30ea\u30c3\u30c8\u30fb\u30db\u30e9\u30a4\u30ba\u30f3DNS\uff1a\u5185\u90e8DNS\u3068\u5916\u90e8DNS<\/h2>\n\n<p>\u4f01\u696d\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3067\u306f\u3001\u79c1\u306f\u6b21\u306e\u3088\u3046\u306b\u4f7f\u3044\u305f\u3044\u3002 <strong>\u30b9\u30d7\u30ea\u30c3\u30c8\u30fb\u30db\u30e9\u30a4\u30ba\u30f3<\/strong>\u5185\u90e8\u30ea\u30be\u30eb\u30d0\u306f\u3001\u5916\u90e8\u30ea\u30be\u30eb\u30d0\u3068\u306f\u7570\u306a\u308b\u5fdc\u7b54\u3092\u63d0\u4f9b\u3059\u308b\uff08\u4f8b\u3048\u3070\u3001\u5185\u90e8\u30b5\u30fc\u30d3\u30b9\u7528\u306e\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8IP\uff09\u3002\u30be\u30fc\u30f3\u306e\u660e\u78ba\u306a\u5206\u96e2\u3068\u6a19\u6e96\u5316\u3055\u308c\u305f\u30e9\u30d9\u30eb\u304c\u3053\u3053\u3067\u306f\u91cd\u8981\u3067\u3042\u308b\u3002\u5185\u90e8\u3067\u3069\u306e\u540d\u524d\u304c\u7570\u306a\u308b\u304b\u3092\u6587\u66f8\u5316\u3057\u3001\u5185\u90e8\u30db\u30b9\u30c8\u540d\u304c\u4e0d\u6ce8\u610f\u306b\u516c\u958b\u3055\u308c\u308b\u306e\u3092\u9632\u304e\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u30be\u30fc\u30f3\u306e\u5883\u754c\u3092\u8d8a\u3048\u305f\u9023\u9396\u3092\u907f\u3051\u308b\u305f\u3081\u306bCNAME\u3092\u63a7\u3048\u3081\u306b\u8a2d\u5b9a\u3057\u3001\u9ad8\u901f\u306a\u30ed\u30fc\u30eb\u30a2\u30a6\u30c8\u306e\u305f\u3081\u306b\u5185\u90e8\u7684\u306bTTL\u3092\u77ed\u304f\u3057\u3066\u304a\u304f\u3002<\/p>\n\n<h2>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\uff1a\u3076\u3089\u4e0b\u304c\u308aCNAME\u3068\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306e\u4e57\u3063\u53d6\u308a\u3092\u907f\u3051\u308b<\/h2>\n\n<p>\u7279\u306b\u91cd\u8981\u306a\u306e\u306f <strong>\u3076\u3089\u4e0b\u304c\u308aCNAME<\/strong> \u3092\u5916\u90e8\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u306b\u63d0\u4f9b\u3057\u3001\u305d\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306f\u3082\u306f\u3084\u5b58\u5728\u3057\u306a\u3044\u3002\u305d\u306e\u5f8c\u3001\u653b\u6483\u8005\u306f\u7a7a\u3044\u3066\u3044\u308b\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3092\u767b\u9332\u3057\u3001\u3042\u306a\u305f\u306e\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u3067\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u914d\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u79c1\u306e\u5bfe\u7b56\u30be\u30fc\u30f3\u3092\u5b9a\u671f\u7684\u306b\u76e3\u67fb\u3057\u3001\u672a\u4f7f\u7528\u306eCNAME\u3092\u524a\u9664\u3057\u3001\u5916\u90e8\u4f9d\u5b58\u95a2\u4fc2\u3092\u6587\u66f8\u5316\u3057\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304c\u671f\u9650\u5207\u308c\u306b\u306a\u3063\u305f\u3089DNS\u30ec\u30b3\u30fc\u30c9\u3092\u7a4d\u6975\u7684\u306b\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3059\u308b\u3002\u307e\u305f\u3001CAA\u30ec\u30b3\u30fc\u30c9\u3092\u8a2d\u5b9a\u3057\u3066\u8a3c\u660e\u66f8\u306e\u767a\u884c\u3092\u5236\u9650\u3057\u3001\u5fc5\u8981\u306a\u7bc4\u56f2\u3067\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n\n<h2>\u30a8\u30a4\u30ea\u30a2\u30b9\u3068\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u306eSEO\u7684\u5074\u9762<\/h2>\n\n<p>DNS\u30a8\u30f3\u30c8\u30ea\u30fc\u306f\u540d\u524d\u3092\u89e3\u6c7a\u3059\u308b\u3082\u306e\u3067\u3042\u308a\u3001\u540d\u524d\u3092\u7f6e\u304d\u63db\u3048\u308b\u3082\u306e\u3067\u306f\u306a\u3044\u3002 <strong>\u8ee2\u9001<\/strong>\u305d\u306e\u305f\u3081\u3001\u691c\u7d22\u30a8\u30f3\u30b8\u30f3\u304c\u30e1\u30a4\u30f3\u30a2\u30c9\u30ec\u30b9\u3092\u8a8d\u8b58\u3067\u304d\u308b\u3088\u3046\u3001HTTP\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3084\u4e00\u8cab\u3057\u305fcanonical\u30bf\u30b0\u306b\u3082\u6ce8\u610f\u3092\u6255\u3063\u3066\u3044\u308b\u3002www\u3092\u30a8\u30a4\u30da\u30c3\u30af\u30b9\u3078\u306eCNAME\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u512a\u5148URL\u306b\u8a98\u5c0e\u3057\u3001\u30b7\u30b0\u30ca\u30eb\u304c\u675f\u306b\u306a\u308b\u3088\u3046\u306b\u3059\u308b\u3002\u30a8\u30a4\u30ea\u30a2\u30b9\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u30b5\u30d6\u30c9\u30e1\u30a4\u30f3\u306b\u3064\u3044\u3066\u306f\u3001\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u4e8c\u91cd\u306b\u8868\u793a\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u5185\u90e8\u30ea\u30f3\u30af\u3068\u30ab\u30ce\u30cb\u30ab\u30eb\u306b\u6ce8\u610f\u3092\u6255\u3044\u3001\u30af\u30ed\u30fc\u30eb\u306e\u4e88\u7b97\u304c\u9069\u5207\u306b\u4fdd\u305f\u308c\u308b\u3088\u3046\u306b\u3059\u308b\u3002\u30a8\u30a4\u30ea\u30a2\u30b9\u3068\u30ea\u30fc\u30c1\u306b\u95a2\u3059\u308b\u5b9f\u8df5\u7684\u306a\u30d2\u30f3\u30c8\u306f\u3001\u4ee5\u4e0b\u306e\u30b3\u30f3\u30d1\u30af\u30c8\u306a\u8a18\u4e8b\u3067\u3054\u89a7\u3044\u305f\u3060\u3051\u307e\u3059\u3002 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