Your network contains an Active Directory domain named contoso.com.
The domain contains a server named Server1 that runs Windows Server 2012 R2 and has the DHCP Server
server role installed.
You need to create an IPv6 scope on Server1. The scope must use an address space that is reserved for
private networks. The addresses must be routable.
Which IPV6 scope prefix should you use?
A.
2001:123:4567:890A::
B.
FE80:123:4567::
C.
FF00:123:4567:890A::
D.
FD00:123:4567::
The difference here is between Link-Local (FE80) and Unique Local (FD00).
Routers will drop FE80 packets, they are only used on a local segment.
Internal routers will route FD00, but IPSs should be dropping them. The are route-able just not on the public internet.
“Unique local addresses are available for use in private networks, e.g. inside a single site or organization or spanning a limited number of sites or organizations. They are not routable in the global IPv6 Internet.”
“Link-local addresses are usually not guaranteed to be unique beyond a single network segment. Routers therefore do not forward packets with link-local addresses.”