
Explanation:
* The localhost (loopback) address, 0:0:0:0:0:0:0:1, and the IPv6 unspecified address,
0:0:0:0:0:0:0:0, are reduced to ::1 and ::, respectively.
* A unique local address (ULA) is an IPv6 address in the block fc00::/7, defined in RFC 4193. It is the approximate IPv6 counterpart of the IPv4 private address.
* Link-local addresses for IPv4 are defined in the address block 169.254.0.0/16, in CIDR notation.
In IPv6, they are assigned with the fe80::/10 prefix.