Which address block is reserved for locally assigned unique local addresses?

Which address block is reserved for locally assigned unique local addresses?
A . 2002::/16
B . FD00::/8
C . 2001::/32
D . FB00::/8

View Answer

Answer: B

Explanation:

The address block fc00::/7 is divided into two /8 groups:

+ The block fc00::/8 has not been defined yet. It has been proposed to be managed by an allocation authority, but this has not gained acceptance in the IETF

+ The block fd00::/8 is defined for /48 prefixes, formed by setting the 40 least-significant bits of the prefix to a randomly generated bit string

Prefixes in the fd00::/8 range have similar properties as those of the IPv4 private address ranges:

+ They are not allocated by an address registry and may be used in networks by anyone without outside involvement.

+ They are not guaranteed to be globally unique.

+ Reverse Domain Name System (DNS) entries (under ip6.arpa) for fd00::/8 ULAs cannot be delegated in the global DNS.

Source: https://en.wikipedia.org/wiki/Unique_local_address