http://blog.pdan.dev/tags/dhcp/ Recent content in DHCP on myblog Hugo en-US Sun, 01 May 2022 21:29:01 +0800 http://blog.pdan.dev/posts/dhcpv6/ Sun, 01 May 2022 21:29:01 +0800 http://blog.pdan.dev/posts/dhcpv6/ <h2 id="pv6-address-types">Pv6 Address Types</h2> <h3 id="the-ipv6-address-space">The IPv6 Address Space</h3> <p>As we already learned, IPv6 addresses are 128-bit long, which means that there are 340 undecillion possible addresses (the exact number is shown below).</p> <pre tabindex="0"><code>340,282,366,920,938,463,463,374,607,431,768,211,456 </code></pre><p>or reference, in IPv4 with its 32-bit address space, there are 4.29 billion possible addresses.</p> <p>The Internet Assigned Numbers Authority (IANA) allocates only a small portion of the whole IPv6 space. IANA provides global unicast addresses that start with leading leftmost bits 001. A small portion of the addresses starting with 000 and 111 are allocated for special types. All other possible addresses are reserved for future use and are currently not being allocated.</p>