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Which statement about IPv6 is true?

Which statement about IPv6 is true?
A . Addresses are not hierarchical and are assigned at random.
B . Only one IPv6 address can exist on a given interface.
C . There are 2.7 billion addresses available.
D . Broadcasts have been eliminated and replaced with multicasts.

Answer: D

Explanation:

http://technet.microsoft.com/en-us/library/cc757359(v=ws.10).aspx

IPv6 has three types of addresses, which can be categorized by type and scope: Unicast addresses. A packet is delivered to one interface.

Multicast addresses. A packet is delivered to multiple interfaces.

Anycast addresses. A packet is delivered to the nearest of multiple interfaces (in terms of routing distance).

IPv6 does not use broadcast messages.

Unicast and anycast addresses in IPv6 have the following scopes (for multicast addresses, the scope are built into the address structure):

Link-local. The scope is the local link (nodes on the same subnet). Site-local. The scope is the organization (private site addressing). Global. The scope is global (IPv6 Internet addresses). In addition, IPv6 has special addresses such as the loopback address. The scope of a special address depends on the type of special address. Much of the IPv6 address space is unassigned.

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