{"id":476223,"date":"2023-08-09T07:26:52","date_gmt":"2023-08-09T07:26:52","guid":{"rendered":""},"modified":"2023-09-05T11:12:17","modified_gmt":"2023-09-05T11:12:17","slug":"cidr","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/cn\/wiki\/cidr\/","title":{"rendered":"CIDR"},"content":{"rendered":"<p>\u65e0\u7c7b\u522b\u57df\u95f4\u8def\u7531 (CIDR) \u662f\u4e00\u79cd\u9769\u547d\u6027\u7684\u7cfb\u7edf\uff0c\u7528\u4e8e\u66f4\u6709\u6548\u5730\u5206\u914d\u548c\u7ba1\u7406 IP \u5730\u5740\u3002 CIDR \u53d6\u4ee3\u4e86\u8fc7\u65f6\u7684\u6709\u7c7b IP \u5bfb\u5740\u65b9\u6848\uff0c\u4ece\u800c\u53ef\u4ee5\u66f4\u597d\u5730\u5229\u7528\u53ef\u7528 IP \u5730\u5740\u7a7a\u95f4\u5e76\u5b9e\u73b0\u66f4\u7075\u6d3b\u7684\u7f51\u7edc\u8bbe\u8ba1\u3002\u901a\u8fc7\u5141\u8bb8\u53ef\u53d8\u957f\u5ea6\u5b50\u7f51\u63a9\u7801\uff0cCIDR \u53ef\u4ee5\u521b\u5efa\u5404\u79cd\u89c4\u6a21\u7684\u7f51\u7edc\uff0c\u5e76\u51cf\u5c11 IP \u5730\u5740\u7684\u6d6a\u8d39\u3002<\/p>\n<h2>CIDR \u7684\u8d77\u6e90\u548c\u9996\u6b21\u63d0\u53ca\u7684\u5386\u53f2<\/h2>\n<p>CIDR \u4e8e 20 \u4e16\u7eaa 90 \u5e74\u4ee3\u521d\u5f15\u5165\uff0c\u4f5c\u4e3a\u5bf9\u53ef\u7528 IPv4 \u5730\u5740\u8017\u5c3d\u7684\u54cd\u5e94\u3002\u4f20\u7edf\u7684\u6709\u7c7bIP\u5bfb\u5740\u7cfb\u7edf\u91c7\u7528\u56fa\u5b9a\u957f\u5ea6\u7684\u5b50\u7f51\u63a9\u7801\uff0c\u5bfc\u81f4IP\u5730\u5740\u5757\u7684\u5206\u914d\u6548\u7387\u4f4e\u4e0b\u3002\u968f\u7740\u4e92\u8054\u7f51\u5448\u6307\u6570\u7ea7\u589e\u957f\uff0c\u5f88\u660e\u663e\u9700\u8981\u4e00\u79cd\u65b0\u7684\u5bfb\u5740\u65b9\u6848\u6765\u907f\u514d IPv4 \u5730\u5740\u8017\u5c3d\u3002<\/p>\n<p>CIDR \u7684\u6700\u521d\u63d0\u6848\u6765\u81ea\u7531 Yogen Dalal \u548c Craig Partridge \u9886\u5bfc\u7684\u65af\u5766\u798f\u5927\u5b66\u5de5\u7a0b\u5e08\u56e2\u961f\u5728 1993 \u5e74\u53d1\u8868\u7684\u4e00\u7bc7\u9898\u4e3a\u201c\u8fb9\u754c\u7f51\u5173\u534f\u8bae 4 (BGP-4)\u201d\u7684\u91cc\u7a0b\u7891\u5f0f\u8bba\u6587\u4e2d\u3002\u8be5\u8bba\u6587\u6982\u8ff0\u4e86 CIDR \u6982\u5ff5\uff0c\u5f88\u5feb\u5c31\u88ab\u4e92\u8054\u7f51\u5de5\u7a0b\u4efb\u52a1\u7ec4 (IETF) \u91c7\u7528\uff0c\u5e76\u6210\u4e3a\u4e92\u8054\u7f51\u53d1\u5c55\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002<\/p>\n<h2>\u6709\u5173 CIDR \u7684\u8be6\u7ec6\u4fe1\u606f \u2013 \u6269\u5c55 CIDR \u4e3b\u9898<\/h2>\n<p>CIDR \u4ece\u6839\u672c\u4e0a\u6539\u53d8\u4e86 IP \u5730\u5740\u5206\u914d\u548c\u5b50\u7f51\u5212\u5206\u7684\u65b9\u5f0f\u3002\u5b83\u5f15\u5165\u4e86\u53ef\u53d8\u957f\u5ea6\u5b50\u7f51\u63a9\u7801\u7684\u6982\u5ff5\uff0c\u5141\u8bb8\u7f51\u7edc\u7ba1\u7406\u5458\u4e3a IP \u5730\u5740\u7684\u7f51\u7edc\u90e8\u5206\u6307\u5b9a\u4efb\u610f\u4f4d\u6570\u3002\u8fd9\u79cd\u7075\u6d3b\u6027\u6709\u5229\u4e8e\u6839\u636e\u5b9e\u9645\u9700\u8981\u5206\u914dIP\u5730\u5740\u5757\uff0c\u907f\u514d\u5c06\u5927\u5730\u5740\u8303\u56f4\u6d6a\u8d39\u5730\u5206\u914d\u7ed9\u5c0f\u578b\u7f51\u7edc\u3002<\/p>\n<p>\u5728 CIDR \u8868\u793a\u6cd5\u4e2d\uff0cIP \u5730\u5740\u540e\u8ddf\u659c\u6760\u548c\u6570\u5b57\uff08\u4f8b\u5982 192.168.1.0\/24\uff09\u3002\u659c\u6760\u540e\u9762\u7684\u6570\u5b57\u8868\u793a\u524d\u7f00\u957f\u5ea6\u6216\u5730\u5740\u7f51\u7edc\u90e8\u5206\u7684\u4f4d\u6570\u3002\u4f8b\u5982\uff0c\/24 \u8868\u793a\u5730\u5740\u7684\u524d 24 \u4f4d\u7528\u4e8e\u7f51\u7edc\uff0c\u5269\u4e0b 32 \u2013 24 = 8 \u4f4d\u7528\u4e8e\u4e3b\u673a\u5730\u5740\uff0c\u63d0\u4f9b 2^8 = 256 \u4e2a\u53ef\u80fd\u7684\u4e3b\u673a\u3002<\/p>\n<h2>CIDR \u7684\u5185\u90e8\u7ed3\u6784 \u2013 CIDR \u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>CIDR \u4f9d\u9760 IP \u5730\u5740\u5757\u7684\u805a\u5408\u6765\u6700\u5c0f\u5316\u8def\u7531\u8868\u5927\u5c0f\u5e76\u63d0\u9ad8\u8def\u7531\u6548\u7387\u3002 CIDR \u5141\u8bb8\u5c06\u591a\u4e2a\u8f83\u5c0f\u7684\u5757\u805a\u5408\u6210\u4e00\u4e2a\u8f83\u5927\u7684\u5757\uff0c\u800c\u4e0d\u662f\u516c\u5e03\u5404\u4e2a IP \u5730\u5740\u8303\u56f4\u3002\u8fd9\u51cf\u5c11\u4e86\u8def\u7531\u8868\u4e2d\u7684\u6761\u76ee\u6570\u91cf\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u5feb\u7684\u8def\u7531\u51b3\u7b56\u548c\u66f4\u6709\u6548\u5730\u5229\u7528\u5e26\u5bbd\u3002<\/p>\n<p>CIDR \u80cc\u540e\u7684\u6838\u5fc3\u601d\u60f3\u662f\u6c47\u603b\uff0c\u5373\u5c06\u591a\u4e2a\u8fde\u7eed\u7684 IP \u5730\u5740\u5757\u7ec4\u5408\u6210\u4e00\u4e2a\u66f4\u5927\u7684\u5757\u3002\u805a\u5408\u5757\u7684\u8def\u7531\u4fe1\u606f\u5728\u6574\u4e2a\u4e92\u8054\u7f51\u4e0a\u516c\u5e03\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u8def\u7531\u8868\u7684\u5927\u5c0f\u3002\u5f53\u6570\u636e\u5305\u9700\u8981\u4f20\u9001\u5230\u805a\u5408\u5757\u5185\u7684 IP \u5730\u5740\u65f6\uff0c\u8def\u7531\u5668\u4f1a\u6267\u884c\u67e5\u627e\u5e76\u6839\u636e\u6c47\u603b\u8def\u7531\u8f6c\u53d1\u6570\u636e\u5305\u3002<\/p>\n<h2>CIDR\u5173\u952e\u7279\u6027\u5206\u6790<\/h2>\n<p>CIDR \u63d0\u4f9b\u4e86\u591a\u9879\u5173\u952e\u529f\u80fd\uff0c\u4f7f\u5176\u6210\u4e3a IP \u5730\u5740\u7ba1\u7406\u7684\u91cd\u8981\u6280\u672f\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u5730\u5740\u7a7a\u95f4\u6548\u7387\uff1a<\/strong> CIDR\u6839\u636e\u5b9e\u9645\u7f51\u7edc\u89c4\u6a21\u9700\u6c42\u5206\u914d\u5730\u5740\uff0c\u663e\u7740\u63d0\u9ad8IP\u5730\u5740\u7a7a\u95f4\u5229\u7528\u7387\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8def\u7531\u805a\u5408\uff1a<\/strong> CIDR \u53ef\u4ee5\u5c06\u591a\u4e2a\u8f83\u5c0f\u7684 IP \u5730\u5740\u5757\u805a\u5408\u4e3a\u8f83\u5927\u7684 IP \u5730\u5740\u5757\uff0c\u4ece\u800c\u51cf\u5c0f\u5168\u5c40\u8def\u7531\u8868\u7684\u5927\u5c0f\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u7b80\u5316\u7684\u7f51\u7edc\u8bbe\u8ba1\uff1a<\/strong> CIDR \u901a\u8fc7\u5141\u8bb8\u53ef\u53d8\u957f\u5ea6\u5b50\u7f51\u63a9\u7801\u6765\u7b80\u5316\u7f51\u7edc\u8bbe\u8ba1\u548c\u7ba1\u7406\uff0c\u4ece\u800c\u63d0\u4f9b\u7f51\u7edc\u8bbe\u8ba1\u7684\u7075\u6d3b\u6027\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u53ef\u6269\u5c55\u6027\uff1a<\/strong> \u501f\u52a9 CIDR\uff0c\u4e92\u8054\u7f51\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u6269\u5c55\uff0c\u4ee5\u9002\u5e94\u4e0d\u65ad\u589e\u957f\u7684\u8fde\u63a5\u8bbe\u5907\u6570\u91cf\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u66f4\u987a\u7545\u7684\u8def\u7531\uff1a<\/strong> CIDR \u901a\u8fc7\u6700\u5927\u9650\u5ea6\u5730\u51cf\u5c11\u8def\u7531\u8868\u6761\u76ee\u7684\u6570\u91cf\u6765\u51cf\u8f7b\u8def\u7531\u5668\u7684\u8d1f\u62c5\uff0c\u4ece\u800c\u66f4\u5feb\u5730\u505a\u51fa\u8def\u7531\u51b3\u7b56\u3002<\/p>\n<\/li>\n<\/ol>\n<h2>CIDR \u7684\u7c7b\u578b<\/h2>\n<p>CIDR\u6839\u636eIP\u5730\u5740\u5757\u7684\u5927\u5c0f\u4e3b\u8981\u5206\u4e3a\u4e09\u79cd\u7c7b\u578b\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>CIDR \u8868\u793a\u6cd5<\/th>\n<th>\u524d\u7f00\u957f\u5ea6<\/th>\n<th>\u4e3b\u673a\u6570\u91cf<\/th>\n<th>\u5b50\u7f51\u63a9\u7801<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\/24<\/td>\n<td>24\u4f4d<\/td>\n<td>256<\/td>\n<td>255.255.255.0<\/td>\n<\/tr>\n<tr>\n<td>\/16<\/td>\n<td>16\u4f4d<\/td>\n<td>65,536<\/td>\n<td>255.255.0.0<\/td>\n<\/tr>\n<tr>\n<td>\/8<\/td>\n<td>8\u4f4d<\/td>\n<td>16,777,216<\/td>\n<td>255.0.0.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>CIDR\u7684\u4f7f\u7528\u65b9\u6cd5\u3001\u4f7f\u7528\u76f8\u5173\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6848<\/h2>\n<p>CIDR \u5e7f\u6cdb\u5e94\u7528\u4e8e\u7f51\u7edc\u7684\u5404\u4e2a\u65b9\u9762\uff0c\u5305\u62ec\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u4e92\u8054\u7f51\u670d\u52a1\u63d0\u4f9b\u5546 (ISP)\uff1a<\/strong> ISP \u4f7f\u7528 CIDR \u6709\u6548\u5730\u5c06 IP \u5730\u5740\u5757\u5206\u914d\u7ed9\u5176\u5ba2\u6237\u548c\u540c\u884c\uff0c\u4ece\u800c\u51cf\u8f7b\u5168\u7403 IP \u5730\u5740\u6c60\u7684\u538b\u529b\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u4e13\u7528\u7f51\u7edc\uff1a<\/strong> \u4f01\u4e1a\u548c\u7ec4\u7ec7\u4f7f\u7528 CIDR \u6765\u8bbe\u8ba1\u5177\u6709\u6700\u4f73 IP \u5730\u5740\u5229\u7528\u7387\u7684\u4e13\u7528\u7f51\u7edc\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u5b50\u7f51\u5212\u5206\uff1a<\/strong> CIDR \u53ef\u4ee5\u8f7b\u677e\u5212\u5206\u5b50\u7f51\uff0c\u4f7f\u7ba1\u7406\u5458\u80fd\u591f\u5c06\u7f51\u7edc\u5212\u5206\u4e3a\u66f4\u5c0f\u7684\u3001\u53ef\u7ba1\u7406\u7684\u5b50\u7f51\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u5c3d\u7ba1\u6709\u5f88\u591a\u597d\u5904\uff0cCIDR \u5b9e\u65bd\u4ecd\u53ef\u80fd\u9762\u4e34\u4ee5\u4e0b\u6311\u6218\uff1a<\/p>\n<ul>\n<li>\n<p><strong>\u914d\u7f6e\u9519\u8bef\uff1a<\/strong> \u4e0d\u6b63\u786e\u7684 CIDR \u8868\u793a\u6cd5\u6216\u805a\u5408\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8def\u7531\u95ee\u9898\u548c\u8fde\u63a5\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u8def\u7531\u4e0d\u7a33\u5b9a\uff1a<\/strong> \u4e0d\u6b63\u786e\u7684\u8def\u7531\u805a\u5408\u4f1a\u5bfc\u81f4\u8def\u7531\u4e0d\u7a33\u5b9a\uff0c\u5f71\u54cd\u7f51\u7edc\u6027\u80fd\u3002<\/p>\n<\/li>\n<li>\n<p><strong>IP \u5730\u5740\u8017\u5c3d\uff1a<\/strong> \u867d\u7136 CIDR \u6709\u52a9\u4e8e\u5ef6\u7f13 IPv4 \u5730\u5740\u8017\u5c3d\uff0c\u4f46\u4e16\u754c\u6b63\u5728\u8fc5\u901f\u8f6c\u5411\u91c7\u7528 IPv6\uff0c\u4ee5\u89e3\u51b3 IP \u5730\u5740\u7684\u957f\u671f\u7a00\u7f3a\u95ee\u9898\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\uff0c\u7f51\u7edc\u7ba1\u7406\u5458\u5fc5\u987b\u4ed4\u7ec6\u89c4\u5212 CIDR \u5206\u914d\u3001\u9a8c\u8bc1\u8def\u7531\u6c47\u603b\uff0c\u5e76\u8003\u8651\u8fc7\u6e21\u5230 IPv6 \u4ee5\u5b9e\u73b0\u957f\u671f\u53ef\u6301\u7eed\u6027\u3002<\/p>\n<h2>\u4e3b\u8981\u7279\u70b9\u53ca\u5176\u4ed6\u4e0e\u540c\u7c7b\u4ea7\u54c1\u7684\u6bd4\u8f83<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u5b66\u671f<\/th>\n<th>\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u6709\u7c7b\u5bfb\u5740<\/td>\n<td>\u4f20\u7edf\u7684 IP \u5bfb\u5740\u65b9\u6848\u5c06\u5730\u5740\u5206\u4e3a\u5177\u6709\u56fa\u5b9a\u63a9\u7801\u7684\u7c7b\u522b\uff08A\u3001B\u3001C\u3001D\u3001E\uff09\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u5b50\u7f51\u5212\u5206<\/td>\n<td>\u5c06\u7f51\u7edc\u5212\u5206\u4e3a\u66f4\u5c0f\u7684\u5b50\u7f51\u4ee5\u6539\u8fdb\u7ba1\u7406\u548c\u6548\u7387\u7684\u8fc7\u7a0b\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u8d85\u7ea7\u7f51<\/td>\n<td>\u4e0e\u5b50\u7f51\u5212\u5206\u76f8\u53cd\uff0c\u591a\u4e2a\u8f83\u5c0f\u7684 IP \u5730\u5740\u5757\u805a\u5408\u6210\u4e00\u4e2a\u8f83\u5927\u7684\u5757\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u4e0e CIDR \u76f8\u5173\u7684\u672a\u6765\u524d\u666f\u548c\u6280\u672f<\/h2>\n<p>\u968f\u7740\u6211\u4eec\u7ee7\u7eed\u9762\u4e34 IPv4 \u5730\u5740\u8017\u5c3d\u7684\u6311\u6218\uff0cCIDR \u4ecd\u7136\u662f\u4e92\u8054\u7f51\u57fa\u7840\u8bbe\u65bd\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002\u7136\u800c\uff0c\u672a\u6765\u5728\u4e8e IPv6 \u7684\u5e7f\u6cdb\u91c7\u7528\uff0c\u5b83\u63d0\u4f9b\u4e86\u5de8\u5927\u7684\u5730\u5740\u7a7a\u95f4\uff0c\u5e76\u4e14\u65e0\u9700\u590d\u6742\u7684 CIDR \u8ba1\u7b97\u3002<\/p>\n<p>IPv6 \u63d0\u4f9b\u5927\u7ea6 340 \u4e2a\u72ec\u7279\u7684 IP \u5730\u5740\uff0c\u786e\u4fdd\u5b50\u5b59\u540e\u4ee3\u4e0d\u4f1a\u62c5\u5fc3 IP \u5730\u5740\u8017\u5c3d\u3002\u5411 IPv6 \u7684\u8fc7\u6e21\u6b63\u5728\u8fdb\u884c\u4e2d\uff0c\u968f\u7740\u8d8a\u6765\u8d8a\u591a\u7684\u8bbe\u5907\u548c\u7f51\u7edc\u91c7\u7528\u8fd9\u4e00\u65b0\u534f\u8bae\uff0cIPv4 \u5730\u5740\u7ba1\u7406\u5bf9 CIDR \u7684\u4f9d\u8d56\u5c06\u9010\u6e10\u51cf\u5c11\u3002<\/p>\n<h2>\u5982\u4f55\u4f7f\u7528\u4ee3\u7406\u670d\u52a1\u5668\u6216\u5c06\u5176\u4e0e CIDR \u5173\u8054<\/h2>\n<p>\u4ee3\u7406\u670d\u52a1\u5668\uff08\u4f8b\u5982 OneProxy \u63d0\u4f9b\u7684\u4ee3\u7406\u670d\u52a1\u5668\uff09\u53ef\u4ee5\u4e0e CIDR \u7ed3\u5408\u4f7f\u7528\uff0c\u4ee5\u589e\u5f3a\u9690\u79c1\u3001\u5b89\u5168\u6027\u548c\u6027\u80fd\u3002\u4ee3\u7406\u670d\u52a1\u5668\u5145\u5f53\u5ba2\u6237\u7aef\u548c\u4e92\u8054\u7f51\u4e4b\u95f4\u7684\u4e2d\u4ecb\uff0c\u4ee3\u8868\u5ba2\u6237\u7aef\u8f6c\u53d1\u8bf7\u6c42\u5e76\u8fd4\u56de\u54cd\u5e94\u3002<\/p>\n<p>CIDR \u53ef\u7528\u4e8e\u4ee3\u7406\u670d\u52a1\u5668\u914d\u7f6e\u4e2d\uff0c\u4ee5\u6709\u6548\u7ba1\u7406 IP \u5730\u5740\u8303\u56f4\u3002\u901a\u8fc7\u5229\u7528 CIDR \u8868\u793a\u6cd5\uff0c\u4ee3\u7406\u670d\u52a1\u5668\u63d0\u4f9b\u5546\u53ef\u4ee5\u6307\u5b9a\u901a\u8fc7\u4ee3\u7406\u8def\u7531\u54ea\u4e9b IP \u5730\u5740\u5757\uff0c\u4ece\u800c\u63a7\u5236\u8bbf\u95ee\u5e76\u4f18\u5316\u7279\u5b9a\u533a\u57df\u6216\u7f51\u7edc\u7684\u6027\u80fd\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u4ee3\u7406\u670d\u52a1\u5668\u53ef\u4ee5\u6839\u636e\u57fa\u4e8e CIDR \u7684\u89c4\u5219\u667a\u80fd\u5730\u5c06\u8bf7\u6c42\u8def\u7531\u5230\u4e0d\u540c\u7684\u670d\u52a1\u5668\uff0c\u4ece\u800c\u5e2e\u52a9\u5206\u914d\u6d41\u91cf\u5e76\u63d0\u4f9b\u8d1f\u8f7d\u5e73\u8861\u3002\u8fd9\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7406\u670d\u52a1\u5668\u63d0\u4f9b\u5546\u63d0\u4f9b\u7684\u670d\u52a1\u7684\u6548\u7387\u548c\u53ef\u9760\u6027\u3002<\/p>\n<h2>\u76f8\u5173\u94fe\u63a5<\/h2>\n<p>\u6709\u5173 CIDR \u53ca\u5176\u5b9e\u65bd\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u60a8\u53ef\u80fd\u4f1a\u53d1\u73b0\u4ee5\u4e0b\u8d44\u6e90\u5f88\u6709\u5e2e\u52a9\uff1a<\/p>\n<ol>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc4632\" target=\"_new\" rel=\"noopener nofollow\">RFC 4632 \u2013 \u65e0\u7c7b\u522b\u57df\u95f4\u8def\u7531 (CIDR)<\/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\">\u4e86\u89e3 IP \u5bfb\u5740\u548c CIDR<\/a><\/li>\n<li><a href=\"https:\/\/www.arin.net\/resources\/registry\/ipv6\/introduction\/\" target=\"_new\" rel=\"noopener nofollow\">IPv6\u7b80\u4ecb<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/cn\/blog\/proxy-servers-and-their-benefits\/\" target=\"_new\" rel=\"noopener\">\u4ee3\u7406\u670d\u52a1\u5668\u53ca\u5176\u4f18\u70b9<\/a><\/li>\n<\/ol>\n<p>\u603b\u4e4b\uff0cCIDR \u662f\u4e00\u9879\u5173\u952e\u6280\u672f\uff0c\u5728\u5ef6\u957f IPv4 \u5bff\u547d\u548c\u6709\u6548\u7ba1\u7406 IP \u5730\u5740\u5206\u914d\u65b9\u9762\u53d1\u6325\u4e86\u5173\u952e\u4f5c\u7528\u3002\u5c55\u671b\u672a\u6765\uff0c\u5411 IPv6 \u7684\u8fc7\u6e21\u662f\u4e0d\u53ef\u907f\u514d\u7684\uff0c\u4f46\u5728\u4e0d\u65ad\u53d1\u5c55\u7684\u4e92\u8054\u7f51\u73af\u5883\u4e2d\uff0cCIDR \u5c06\u7ee7\u7eed\u6210\u4e3a\u7f51\u7edc\u8bbe\u8ba1\u548c\u7ba1\u7406\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002<\/p>","protected":false},"featured_media":476224,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476223","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Classless Inter-Domain Routing (CIDR) - A Comprehensive Guide<\/mark>","faq_items":[{"question":"What is CIDR?","answer":"<p>CIDR stands for Classless Inter-Domain Routing, a system used to allocate and manage IP addresses more efficiently. It replaces the outdated classful IP addressing scheme and allows for variable-length subnet masks, enabling better address space utilization and flexible network design.<\/p>"},{"question":"How did CIDR originate?","answer":"<p>CIDR was introduced in the early 1990s in response to the exhaustion of available IPv4 addresses. The concept was first proposed in a paper titled \"A Border Gateway Protocol 4 (BGP-4)\" by engineers at Stanford University. Soon after, it was adopted by the Internet Engineering Task Force (IETF) and became crucial for internet growth.<\/p>"},{"question":"How does CIDR work?","answer":"<p>CIDR relies on variable-length subnet masks to allocate IP addresses based on actual network size requirements. It allows multiple smaller IP address blocks to be aggregated into larger ones, reducing the size of routing tables and improving routing efficiency.<\/p>"},{"question":"What are the key features of CIDR?","answer":"<p>CIDR offers several benefits, including improved address space efficiency, route aggregation for smaller blocks, simplified network design, scalability, and smoother routing. These features make CIDR an essential technology for IP address management.<\/p>"},{"question":"What types of CIDR exist?","answer":"<p>CIDR is classified based on the prefix length, which determines the size of the IP address block. Some common types include \/24, \/16, and \/8, each with varying numbers of hosts and subnet masks.<\/p>"},{"question":"How is CIDR used, and what are the challenges?","answer":"<p>CIDR is used in various aspects of networking, including ISPs, private networks, and subnetting. However, it can face challenges like misconfiguration, routing instabilities, and IPv4 address exhaustion. Transitioning to IPv6 is a long-term solution to address this concern.<\/p>"},{"question":"How does CIDR relate to the future of networking?","answer":"<p>While CIDR continues to be crucial for managing IPv4 addresses, the future lies in widespread adoption of IPv6, which offers an enormous address space and eliminates the need for complex CIDR calculations.<\/p>"},{"question":"How are proxy servers associated with CIDR?","answer":"<p>Proxy servers can be used with CIDR to enhance privacy, security, and performance. By utilizing CIDR notation, proxy server providers can efficiently manage IP address ranges, control access, and optimize services for specific regions or networks.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/476223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/wiki\/476223\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media\/476224"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/cn\/wp-json\/wp\/v2\/media?parent=476223"}],"curies":[{"name":"\u53ef\u6e7f\u6027\u7c89\u5242","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}