What is a difference between an IPv6 multicast address and an IPv6 anycast address?
A.
An IPv6 multicast address uses the prefix 2002::/15 and forwards to one destination, and an IPv6 anycast address uses the prefix ff00:/8 and forwards to any destination in a group.
B.
A packet sent to an IPv6 multicast address is delivered to one or more destinations at once, but a packet sent to an IPv6 anycast address is routed to the closest interface with that address.
C.
IPV6 multicast addresses are used to transition from IPv4 to IPv6, and IPv6 anycast addresses are used for address aggregation in an IPv6-only environment.
D.
An IPV6 multicast address is assigned to numerous interfaces within a subnet, but an IPv6 anycast address is used for a predefined group of nodes in an all-IPv6 routers group.
B) is correct
D) is incorrect because the second part describing anycast is actually describing FF02::2 multicast which is an all-ipv6 routers multicast
B. A packet sent to an IPv6 multicast address is delivered to one or more destinations at once, but a packet sent to an IPv6 anycast address is routed to the closest interface with that address.
In IPv6, a multicast address is used to deliver packets to multiple nodes in a group, whereas an anycast address is used to route a packet to the nearest (or best) interface among a group of interfaces that share the same anycast address. Anycast is typically used for services where the closest instance can respond to a request, providing a form of load balancing and redundancy.
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