Network Engineer Silver - Address Architecture

IPv6 Addresses are a bit more complex than IPv4 addresses. For one thing, they are four times longer. For another, the "scope" concept is more fully developed, for both Unicast and Multicast.

One of the big differences in IPv6 Address Architecture (compared to IPv4) is the use of hexadecimal instead of decimal. As you will see, hexadecimal is actually easier to use for IP addresses than decimal is. They should have used it in IPv4. IPv4 subnetting would have been a lot easier if they had. In fairly short order, you will get used to having a few "letters" (a-f) in your "numbers". You can even have such fun numbers as "dead:beef" or "a:bad:idea:dad". One of my favorites is the IPv6 address of Facebook: 2a03:2880:10:8f07:face:b00c:0:1. It's a bit of a stretch, but there is no "k" in hexadecimal.


E. Case Study: an IPv6 Addressing Scheme