You own a home network connecting through an always-on connection and need to assign IPv6
addresses to your routers because you want to follow the guidelines spelled out in RFC 3177. You
want to design your network with the correct prefixes.
Which prefix would your ISP likely allocate to your network?

A.
47-bit prefix

B.
48-bit prefix

C.
64-bit prefix

D.
128-bit prefix

Explanation:
From RFC 3177: This document provides recommendations to the addressing
registries (APNIC, ARIN and RIPE-NCC) on policies for assigning IPv6 address blocks to end
sites. In particular, it recommends the assignment of /48 in the general case, /64 when it is known
that one and only one subnet is needed and /128 when it is absolutely known that one and only
one device is connecting.