When discussing IPv6 addresses folks are often quick to say, “FE80 …that’s link-local.” And it’s true. The prefix FE80::/10 is reserved for link-local IPv6 addressing. But a lot of people overlook the fact that the 10-bit prefix only covers two of the four bits represented by the third character in the address. The ‘F’ and…
By now most of us know that the IPv6 address space is 128-bits. That’s 96-bits larger than the 32-bit IPv4 address space. By now most of us also know that the IPv4 address space has (on paper) 4,294,967,265 possible address. So just how big is the IPv6 address space? Well, it’s 2128 (2 raised to…
In an earlier post I offered some perspective on just how big the 128-bit IPv6 address space is. The ridiculousness of the number of addresses offers plenty of opportunity for levity. Earlier today I was thinking about what other ways I could show the size of the address space in a way that was meaningful.…