Which IPv6 address is the all-router multicast group?
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A. B. C. D.B
Well-known IPv6 multicast addresses:
Address -
Description -
ff02::1
All nodes on the local network segment
ff02::2
All routers on the local network segment
The correct answer is B. FF02::2.
In IPv6, multicast addresses are used to send data packets to multiple hosts simultaneously. All-router multicast group is used to send data packets to all routers on a network segment.
The format of IPv6 multicast addresses is FF0X::/16, where X is a hexadecimal value that indicates the specific multicast group. The multicast group FF02::/16 is reserved for link-local addresses, meaning they are only used within a specific network segment.
The all-router multicast group has the multicast address FF02::2. This address is used to send data packets to all routers on a network segment. This allows routers to exchange routing information and perform other functions required for network operation.
Option A (FF02::1) is the all-nodes multicast group, which is used to send data packets to all nodes on a network segment. Option C (FF02::3) is used for a multicast group for addresses that are dynamically assigned to nodes, while option D (FF02::4) is used for multicast group for multicast listener discovery.
Therefore, option B (FF02::2) is the correct answer for the all-router multicast group.