IPv6 Address Types

IPv6 addresses

There are two types of IPv6 addresses:

1. Global addresses such as 2000::/3 (used on the Internet).
2. Link-local addresses such as FE80::/10 (used in LANs).

Let’s discuss them in detail.

1) IPv6 global addresses

The IPv6 global addresses are similar to public IPv4 addresses in that they can be used on the internet as well as on LANs. It is easy to recognize these global addresses because they always start with the number 2 or 3 (due to their subnet mask -> 2000::/3).

In the figure below, we can see the structure of such an IPv6 address:

The first three bits are reserved, which is why the IPv6 Global addresses start with 2). After this resides the global routing prefix (the addressing space that has been reserved for the ISP). The subnet ID represents the ID of the networks (a total of ...