https://wiki.fangc.top/index.php?action=history&feed=atom&title=Ipv6 2026-04-21T08:42:23Z 本wiki上该页面的版本历史 MediaWiki 1.44.0 https://wiki.fangc.top/index.php?title=Ipv6&diff=428&oldid=prev 2023-03-09T06:21:10Z

<p></p> <p><b>新页面</b></p><div>== IPv6格式 ==<br /> IPv6二进位制下为128位长度，以16位为一组，每组以冒号“:”隔开，可以分为8组，每组以4位十六进制方式表示。例如：&lt;code&gt;2001:0db8:86a3:08d3:1319:8a2e:0370:7344&lt;/code&gt; 是一个合法的IPv6地址。类似于IPv4的点分十进制，同样也存在点分十六进制的写法，将8组4位十六进制地址的冒号去除后，每位以点号“.”分组，例如：&lt;code&gt;2001:0db8:85a3:08d3:1319:8a2e:0370:7344&lt;/code&gt;则记为&lt;code&gt;2.0.0.1.0.d.b.8.8.5.a.3.0.8.d.3.1.3.1.9.8.a.2.e.0.3.7.0.7.3.4.4&lt;/code&gt;，其倒序写法用于ip6.arpa子域名记录IPv6地址与域名的映射。<br /> <br /> 同时IPv6在某些条件下可以省略：<br /> <br /> # 每项数字前导的0可以省略，省略后前导数字仍是0则继续，例如下组IPv6是等价的。<br /> #: 2001:&#039;&#039;&#039;0&#039;&#039;&#039;db8:&#039;&#039;&#039;0&#039;&#039;&#039;2de:&#039;&#039;&#039;0000&#039;&#039;&#039;:&#039;&#039;&#039;0000&#039;&#039;&#039;:&#039;&#039;&#039;0000&#039;&#039;&#039;:&#039;&#039;&#039;0000&#039;&#039;&#039;:&#039;&#039;&#039;0&#039;&#039;&#039;e13<br /> #: 2001:db8:2de:&#039;&#039;&#039;0000&#039;&#039;&#039;:&#039;&#039;&#039;0000&#039;&#039;&#039;:&#039;&#039;&#039;0000&#039;&#039;&#039;:&#039;&#039;&#039;0000&#039;&#039;&#039;:e13<br /> #: 2001:db8:2de:&#039;&#039;&#039;000&#039;&#039;&#039;:&#039;&#039;&#039;000&#039;&#039;&#039;:&#039;&#039;&#039;000&#039;&#039;&#039;:&#039;&#039;&#039;000&#039;&#039;&#039;:e13<br /> #: 2001:db8:2de:&#039;&#039;&#039;00&#039;&#039;&#039;:&#039;&#039;&#039;00&#039;&#039;&#039;:&#039;&#039;&#039;00&#039;&#039;&#039;:&#039;&#039;&#039;00&#039;&#039;&#039;:e13<br /> #: 2001:db8:2de:&#039;&#039;&#039;0&#039;&#039;&#039;:&#039;&#039;&#039;0&#039;&#039;&#039;:&#039;&#039;&#039;0&#039;&#039;&#039;:&#039;&#039;&#039;0&#039;&#039;&#039;:e13<br /> # 可以用双冒号“::”表示一组0或多组连续的0，但只能出现一次：<br /> ## 如果四组数字都是零，可以被省略。遵照以上省略规则，下面这两组IPv6都是相等的。<br /> ##* 2001:db8:2de:&#039;&#039;&#039;0&#039;&#039;&#039;:&#039;&#039;&#039;0&#039;&#039;&#039;:&#039;&#039;&#039;0&#039;&#039;&#039;:&#039;&#039;&#039;0&#039;&#039;&#039;:e13<br /> ##: 2001:db8:2de&#039;&#039;&#039;::&#039;&#039;&#039;e13<br /> ##* 2001:0db8:0000:0000:0000:0000:1428:57ab<br /> ##: 2001:0db8:0000:0000:0000::1428:57ab<br /> ##: 2001:0db8:0:0:0:0:1428:57ab<br /> ##: 2001:0db8:0::0:1428:57ab<br /> ##: 2001:0db8::1428:57ab<br /> ## 2001&#039;&#039;&#039;::&#039;&#039;&#039;25de&#039;&#039;&#039;::&#039;&#039;&#039;cade 是非法的，因为双冒号出现了两次。它有可能是下种情形之一，造成无法推断。<br /> ##* 2001:0000:0000:0000:0000:25de:0000:cade<br /> ##* 2001:0000:0000:0000:25de:0000:0000:cade<br /> ##* 2001:0000:0000:25de:0000:0000:0000:cade<br /> ##* 2001:0000:25de:0000:0000:0000:0000:cade<br /> ## 如果这个地址实际上是IPv4的地址，后32位可以用10进制数表示；因此::ffff:192.168.89.9 相等于::ffff:c0a8:5909。<br /> [[分类:互联网标准]]</div>

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