IPv6 Address Blocks for Multicast Forwarding - Exam 200-301 Answer

IPv6 Address Blocks for Multicast Forwarding

Question

Which IPv6 address block forwards packets to a multicast address rather than a unicast address?

Answers

Explanations

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A. B. C. D.

D

The answer is D. FF00::/12.

In IPv6, multicast addresses are used to send packets to multiple devices simultaneously. These addresses start with the prefix FF00::/8. The first 8 bits (FF) indicate that the address is a multicast address, while the next 4 bits indicate the scope of the multicast group.

The FF00::/12 address block is reserved for IPv6 multicast addresses with a link-local scope, which means they are used for communication within a single network segment. This includes all addresses that start with FF02::/16, which are link-local multicast addresses.

On the other hand, unicast addresses are used to send packets to a specific device. The IPv6 address blocks for unicast addresses are:

  • Global unicast addresses: 2000::/3
  • Unique local addresses: FC00::/7
  • Link-local addresses: FE80::/10

Therefore, the correct answer is D. FF00::/12.