{"id":476239,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:18","modified_gmt":"2023-09-05T11:12:18","slug":"class-b-ip-address","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/jp\/wiki\/class-b-ip-address\/","title":{"rendered":"\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9"},"content":{"rendered":"<p>\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30d7\u30ed\u30c8\u30b3\u30eb (IP) \u306b\u3088\u3063\u3066\u5b9a\u7fa9\u3055\u308c\u308b IP \u30a2\u30c9\u30ec\u30b9\u306e\u30ab\u30c6\u30b4\u30ea\u306e 1 \u3064\u3067\u3042\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u306e\u30c7\u30fc\u30bf\u306e\u9001\u53d7\u4fe1\u65b9\u6cd5\u3092\u898f\u5b9a\u3059\u308b\u4e00\u9023\u306e\u30eb\u30fc\u30eb\u3067\u3059\u3002<\/p>\n<h2>\u6b74\u53f2\u3068\u8d77\u6e90<\/h2>\n<p>\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306e\u6982\u5ff5\u306f\u3001\u30af\u30e9\u30b9\u30d5\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u3068\u3057\u3066\u77e5\u3089\u308c\u308b\u521d\u671f\u306e IP \u30a2\u30c9\u30ec\u30b9\u5206\u985e\u30b7\u30b9\u30c6\u30e0\u306b\u7531\u6765\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30b7\u30b9\u30c6\u30e0\u306f\u30011980 \u5e74\u4ee3\u9803\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u521d\u671f\u306b\u3001IP \u30a2\u30c9\u30ec\u30b9\u306e\u5272\u308a\u5f53\u3066\u3068\u914d\u5e03\u3092\u7ba1\u7406\u3059\u308b\u624b\u6bb5\u3068\u3057\u3066 IPv4 (\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30d7\u30ed\u30c8\u30b3\u30eb \u30d0\u30fc\u30b8\u30e7\u30f3 4) \u306e\u958b\u767a\u3068\u3068\u3082\u306b\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h2>\u8a73\u7d30\u306a\u60c5\u5831<\/h2>\n<p>\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u521d\u671f\u6bb5\u968e\u3067\u4f7f\u7528\u3055\u308c\u305f 5 \u3064\u306e IP \u30a2\u30c9\u30ec\u30b9 (\u30af\u30e9\u30b9 A\u3001B\u3001C\u3001D\u3001\u304a\u3088\u3073 E) \u306e 1 \u3064\u3067\u3059\u3002\u30af\u30e9\u30b9\u30d5\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0\u3067\u306f\u3001\u5404\u30af\u30e9\u30b9\u304c\u500b\u5225\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u3068\u30db\u30b9\u30c8 \u30a2\u30c9\u30ec\u30b9\u6307\u5b9a\u30b9\u30ad\u30fc\u30e0\u3092\u4f7f\u7528\u3057\u3001\u30af\u30e9\u30b9 B \u306e IP \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30b5\u30a4\u30ba\u3068\u898f\u6a21\u306e\u70b9\u3067\u30af\u30e9\u30b9 A \u3068\u30af\u30e9\u30b9 C \u306e\u9593\u306b\u4f4d\u7f6e\u3057\u307e\u3059\u3002<\/p>\n<p>\u5404\u30af\u30e9\u30b9 B \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u306f 16 \u30d3\u30c3\u30c8\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u305d\u306e\u5f8c\u306b 16 \u30d3\u30c3\u30c8\u306e\u30db\u30b9\u30c8\u756a\u53f7\u304c\u7d9a\u304d\u307e\u3059\u3002\u30af\u30e9\u30b9 B \u306e IP \u30a2\u30c9\u30ec\u30b9\u7bc4\u56f2\u306f 128.0.0.0 \uff5e 191.255.255.255 \u3067\u3059\u3002\u3053\u308c\u306f\u3001\u30af\u30e9\u30b9 B \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u306f\u6700\u5927 65,534 \u500b\u306e\u30db\u30b9\u30c8 (\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u3068\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8 \u30a2\u30c9\u30ec\u30b9\u306e 2^16 \u30de\u30a4\u30ca\u30b9 2) \u3092\u542b\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n<h2>\u5185\u90e8\u69cb\u9020\u3068\u6a5f\u80fd<\/h2>\n<p>\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306b\u306f\u30012 \u30aa\u30af\u30c6\u30c3\u30c8\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u90e8\u5206\u3068 2 \u30aa\u30af\u30c6\u30c3\u30c8\u306e\u30db\u30b9\u30c8\u90e8\u5206\u304c\u3042\u308a\u307e\u3059\u3002\u30d0\u30a4\u30ca\u30ea\u7528\u8a9e\u3067\u306f\u3001\u6700\u521d\u306e 2 \u30aa\u30af\u30c6\u30c3\u30c8\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u3001\u6700\u5f8c\u306e 2 \u30aa\u30af\u30c6\u30c3\u30c8\u304c\u30db\u30b9\u30c8 \u30a2\u30c9\u30ec\u30b9\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001IP \u30a2\u30c9\u30ec\u30b9 150.150.1.1 \u3067\u306f\u3001\u300c150.150\u300d\u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u3001\u300c1.1\u300d\u304c\u30db\u30b9\u30c8 \u30a2\u30c9\u30ec\u30b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30af\u30e9\u30b9 B \u30a2\u30c9\u30ec\u30b9\u306e\u6700\u521d\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u306e\u6700\u521d\u306e 2 \u30d3\u30c3\u30c8\u306f\u5e38\u306b 10 \u3067\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u7528\u306b 14 \u30d3\u30c3\u30c8\u304c\u6b8b\u308a\u3001\u5408\u8a08 16,384 (2^14) \u500b\u306e\u53ef\u80fd\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af \u30a2\u30c9\u30ec\u30b9\u304c\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u4e3b\u306a\u7279\u9577<\/h2>\n<p>\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306e\u4e3b\u306a\u6a5f\u80fd\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p>\u591a\u6570\u306e\u30db\u30b9\u30c8 \u30a2\u30c9\u30ec\u30b9: \u30af\u30e9\u30b9 B \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306f\u3001\u304b\u306a\u308a\u306e\u6570\u306e\u30db\u30b9\u30c8 \u30a2\u30c9\u30ec\u30b9\u3092\u53ce\u5bb9\u3067\u304d\u308b\u305f\u3081\u3001\u4e2d\u898f\u6a21\u304b\u3089\u5927\u898f\u6a21\u306e\u7d44\u7e54\u306b\u6700\u9069\u3067\u3059\u3002<\/p>\n<\/li>\n<li>\n<p>\u30af\u30e9\u30b9 B \u30a2\u30c9\u30ec\u30b9\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u306b\u4e00\u610f\u3067\u3059: \u5404\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5168\u4f53\u3067\u4e00\u610f\u3067\u3042\u308b\u305f\u3081\u3001\u7af6\u5408\u3084\u91cd\u8907\u304c\u767a\u751f\u3057\u307e\u305b\u3093\u3002<\/p>\n<\/li>\n<li>\n<p>\u30d0\u30a4\u30ca\u30ea\u8b58\u5225\u5b50: \u30af\u30e9\u30b9 B \u30a2\u30c9\u30ec\u30b9\u306e\u6700\u521d\u306e\u30d3\u30c3\u30c8\u306f 10 \u306b\u8a2d\u5b9a\u3055\u308c\u3001\u4ed6\u306e\u30af\u30e9\u30b9\u3068\u533a\u5225\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306e\u7a2e\u985e<\/h2>\n<p>\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u57fa\u3065\u3044\u3066\u5206\u985e\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>\n<p><strong>\u30d1\u30d6\u30ea\u30c3\u30af\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9:<\/strong> \u3053\u308c\u3089\u306f\u4e16\u754c\u7684\u306b\u4e00\u610f\u3067\u3042\u308a\u3001Internet Assigned Numbers Authority (IANA) \u304a\u3088\u3073\u5730\u57df\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30ec\u30b8\u30b9\u30c8\u30ea (RIR) \u306b\u3088\u3063\u3066\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u901a\u4fe1\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8 \u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9:<\/strong> \u3053\u308c\u3089\u306f\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u7528\u306b\u4e88\u7d04\u3055\u308c\u3066\u304a\u308a\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u306f\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3067\u304d\u307e\u305b\u3093\u3002\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8 \u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306e\u4e88\u7d04\u7bc4\u56f2\u306f 172.16.0.0 \uff5e 172.31.255.255 \u3067\u3059\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>\u4f7f\u7528\u6cd5\u3068\u95a2\u9023\u3059\u308b\u554f\u984c<\/h2>\n<p>\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306f\u901a\u5e38\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u63a5\u7d9a\u3055\u308c\u305f\u30c7\u30d0\u30a4\u30b9\u306b\u591a\u6570\u306e IP \u30a2\u30c9\u30ec\u30b9\u3092\u5fc5\u8981\u3068\u3059\u308b\u4e2d\u898f\u6a21\u304b\u3089\u5927\u898f\u6a21\u306e\u7d44\u7e54\u3067\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001IP \u30a2\u30c9\u30ec\u30b9\u306e\u67af\u6e07\u306e\u554f\u984c\u306b\u3088\u308a\u3001\u30af\u30e9\u30b9 B \u30a2\u30c9\u30ec\u30b9\u3092\u542b\u3080\u30af\u30e9\u30b9\u30d5\u30eb \u30cd\u30c3\u30c8\u30ef\u30fc\u30ad\u30f3\u30b0 \u30b7\u30b9\u30c6\u30e0\u306f\u3001\u30af\u30e9\u30b9\u30ec\u30b9 \u30c9\u30e1\u30a4\u30f3\u9593\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0 (CIDR) \u306b\u5927\u90e8\u5206\u304c\u7f6e\u304d\u63db\u3048\u3089\u308c\u307e\u3057\u305f\u3002 CIDR \u3092\u4f7f\u7528\u3059\u308b\u3068\u3001IP \u30a2\u30c9\u30ec\u30b9\u3092\u3088\u308a\u52b9\u7387\u7684\u306b\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u985e\u4f3c\u306e\u7528\u8a9e\u3068\u306e\u6bd4\u8f03<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u30a2\u30a4\u30c6\u30e0<\/th>\n<th>\u30af\u30e9\u30b9A<\/th>\n<th>\u30af\u30e9\u30b9B<\/th>\n<th>\u30af\u30e9\u30b9C<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u6700\u521d\u306e\u30aa\u30af\u30c6\u30c3\u30c8\u7bc4\u56f2<\/td>\n<td>1-126<\/td>\n<td>128-191<\/td>\n<td>192-223<\/td>\n<\/tr>\n<tr>\n<td>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d3\u30c3\u30c8<\/td>\n<td>8<\/td>\n<td>16<\/td>\n<td>24<\/td>\n<\/tr>\n<tr>\n<td>\u30db\u30b9\u30c8\u30d3\u30c3\u30c8<\/td>\n<td>24<\/td>\n<td>16<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u6570<\/td>\n<td>126<\/td>\n<td>16,384<\/td>\n<td>2,097,152<\/td>\n<\/tr>\n<tr>\n<td>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3054\u3068\u306e\u30db\u30b9\u30c8\u6570<\/td>\n<td>16,777,214<\/td>\n<td>65,534<\/td>\n<td>254<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u5c06\u6765\u306e\u5c55\u671b\u3068\u6280\u8853<\/h2>\n<p>IPv6 \u306e\u5c0e\u5165\u306b\u3088\u308a\u3001\u5927\u5e45\u306b\u5927\u304d\u306a\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u304c\u63d0\u4f9b\u3055\u308c\u3001IPv4 \u30a2\u30c9\u30ec\u30b9\u306e\u67af\u6e07\u306e\u554f\u984c\u306f\u89e3\u6c7a\u3055\u308c\u307e\u3057\u305f\u3002\u305d\u308c\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001IPv6 \u3078\u306e\u79fb\u884c\u306b\u306f\u30b3\u30b9\u30c8\u3068\u8907\u96d1\u3055\u304c\u4f34\u3046\u305f\u3081\u3001\u591a\u304f\u306e\u7d44\u7e54\u306f\u30af\u30e9\u30b9 B \u30a2\u30c9\u30ec\u30b9\u3092\u542b\u3080 IPv4 \u3092\u4f7f\u7528\u3057\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u30d7\u30ed\u30ad\u30b7\u30b5\u30fc\u30d0\u30fc\u3068\u306e\u95a2\u9023\u4ed8\u3051<\/h2>\n<p>\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u65b9\u6cd5\u3067\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u306b\u95a2\u9023\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30b5\u30fc\u30d0\u30fc\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u9593\u3067\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u5fdc\u7b54\u3092\u8ee2\u9001\u3067\u304d\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u4e00\u9023\u306e\u30af\u30e9\u30b9 B IP \u30a2\u30c9\u30ec\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u30d7\u30ed\u30ad\u30b7 \u30b5\u30fc\u30d0\u30fc\u306e\u8ca0\u8377\u304c\u5206\u6563\u3055\u308c\u3001\u5197\u9577\u6027\u304c\u9ad8\u307e\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u533f\u540d\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002<\/p>\n<h2>\u95a2\u9023\u30ea\u30f3\u30af<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.iana.org\/\" target=\"_new\" rel=\"noopener nofollow\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u5272\u308a\u5f53\u3066\u756a\u53f7\u5c40 (IANA)<\/a><\/li>\n<li><a href=\"https:\/\/www.nro.net\/\" target=\"_new\" rel=\"noopener nofollow\">\u5730\u57df\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8 \u30ec\u30b8\u30b9\u30c8\u30ea (RIR)<\/a><\/li>\n<li><a href=\"https:\/\/www.cisco.com\/c\/en\/us\/support\/docs\/ip\/routing-information-protocol-rip\/13788-3.html\" target=\"_new\" rel=\"noopener nofollow\">IP \u30a2\u30c9\u30ec\u30b9\u3068\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u6982\u8981<\/a><\/li>\n<li><a href=\"https:\/\/web.mit.edu\/rhel-doc\/4\/RH-DOCS\/rhel-sg-en-4\/ch-ipaddress.html\" target=\"_new\" rel=\"noopener nofollow\">IP \u30a2\u30c9\u30ec\u30b9\u6307\u5b9a\u306b\u3064\u3044\u3066<\/a><\/li>\n<\/ul>","protected":false},"featured_media":476240,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476239","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Understanding Class B IP Address<\/mark>","faq_items":[{"question":"What is a Class B IP address?","answer":"<p>A Class B IP address is a type of IP address defined by the Internet Protocol. It has a 16-bit network prefix and a 16-bit host number, with an IP address range from 128.0.0.0 to 191.255.255.255.<\/p>"},{"question":"Where did Class B IP addresses originate?","answer":"<p>Class B IP addresses originated from the classful networking system introduced in the early days of the internet around the 1980<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/476239","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/wiki\/476239\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media\/476240"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/jp\/wp-json\/wp\/v2\/media?parent=476239"}],"curies":[{"name":"\u3046\u30fc\u3093","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}