Configured Interface Joining Multicast Addresses
Question
When IPv6 is enabled on an interface, which three multicast addresses does the configured interface automatically join? (Choose three.)
Answers
Explanations
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A. B. C. D. E. F. G.CDF.
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/cli_4_1/clibook/ipv6.pdf https://www.iana.org/assignments/ipv6-multicast-addresses/ipv6-multicast-addresses.xmlWhen IPv
When IPv6 is enabled on an interface, the interface automatically joins certain multicast addresses. These addresses are used for various IPv6 functions and protocols. Let's go through each answer option and explain the purpose of the multicast address:
A. FF01::2: This multicast address is the link-local all-routers address. It is used by routers to communicate with each other on the local link.
B. FEC0::1: This address is a site-local address, but it has been deprecated in favor of global unicast addresses. It is not used for interface multicast group joining.
C. FF02:0:0:0:0:1:FF00::/104: This is a multicast address range used for IPv6 Neighbor Discovery Protocol (NDP) functions, such as address resolution. It is used to resolve a unicast IPv6 address to its corresponding link-layer MAC address.
D. FF02::1: This multicast address is the all-nodes address. It is used for communication with all nodes on the local link.
E. FF01::1: This multicast address is the all-nodes address for the link-local scope. It is used for communication with all nodes on the local link, specifically within the link-local address range.
F. FF02::2: This multicast address is the all-routers address. It is used for communication with all routers on the local link.
G. FF02::D: This multicast address is used for the Solicited-Node multicast address in IPv6. It is created by appending the last 24 bits (three bytes) of an IPv6 unicast or anycast address to FF02::1:FF00::/104. It is used for efficient address resolution, where a node multicasts to the Solicited-Node multicast address to find the link-layer address of a specific unicast or anycast address.
H. FF02::5: This multicast address is the OSPFv3 AllSPF routers address. It is used by OSPFv3 routers to communicate with each other and exchange link-state information.
Based on the explanations above, the correct answers are:
A. FF01::2 D. FF02::1 F. FF02::2
