70-642 · Question #90
You need to use link-local IPv6 addresses to perform multicasting. Which IPv6 prefix should you use?
The correct answer is A. FF00::/8. IPv6 multicast addresses have the first eight bits fixed at 1111 1111. Therefore the address prefix for all IPv6 multicast addresses is FF00::/8. Beyond the first eight bits, multicast addresses include additional structure to identify flags, their scope, and the multicast group.
Question
You need to use link-local IPv6 addresses to perform multicasting. Which IPv6 prefix should you use?
Options
- AFF00::/8
- BFD00::/8
- CFE80::/10
- DFEC0::/10
How the community answered
(35 responses)- A80% (28)
- B3% (1)
- C11% (4)
- D6% (2)
Explanation
IPv6 multicast addresses have the first eight bits fixed at 1111 1111. Therefore the address prefix for all IPv6 multicast addresses is FF00::/8. Beyond the first eight bits, multicast addresses include additional structure to identify flags, their scope, and the multicast group.
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