Introduction to IPv6 Addresses and Prefixes
The other chapters in Part IV of this book have explained many details of how IPv4 addressing and subnetting work. For instance, with IPv4, you need to be able to interpret IPv4 addresses, like 172.21.73.14. You need to be able to work with prefix-style masks, like /25, and interpret what that means when used with a particular IPv4 address. And you need to be able to take an address and mask, like 172.21.73.14/25, and find the subnet ID.
The next few pages introduce the equivalent work with IPv6. Thankfully, even though the IPv6 addresses are much longer, the math is typically much more obvious and easier to do. In particular, this section looks at the following:
How to write and interpret unabbreviated ...