200-301 · Question #1418
What is a difference between an IPv6 multicast address and an IPv6 anycast address?
The correct answer is B. A packet sent to an IPv6 multicast address is delivered to one or more destinations at once, but a. IPv6 multicast delivers packets to multiple destinations simultaneously, whereas IPv6 anycast delivers to the closest single destination among a group.
Question
Options
- AAn IPv6 multicast address uses the prefix 2002::/15 and forwards to one destination, and an IPv6
- BA packet sent to an IPv6 multicast address is delivered to one or more destinations at once, but a
- CIPV6 multicast addresses are used to transition from IPv4 to IPv6, and IPv6 anycast addresses
- DAn IPV6 multicast address is assigned to numerous interfaces within a subnet, but an IPv6
How the community answered
(37 responses)- A5% (2)
- B89% (33)
- C3% (1)
- D3% (1)
Why each option
IPv6 multicast delivers packets to multiple destinations simultaneously, whereas IPv6 anycast delivers to the closest single destination among a group.
The prefix 2002::/15 is for 6to4 transition, not a general IPv6 multicast address, and multicast delivers to multiple, not a single, destination.
A packet sent to an IPv6 multicast address is delivered to all members of a specific group of interfaces, allowing for efficient one-to-many communication. Conversely, a packet sent to an IPv6 anycast address is delivered only to the topologically nearest single interface from a group of interfaces configured with the same anycast address.
IPv6 multicast addresses are used for group communication, not specifically for IPv4 to IPv6 transition mechanisms.
While multicast addresses are assigned to numerous interfaces, this choice does not provide a complete and accurate distinction from anycast as clearly as option B.
Concept tested: IPv6 multicast vs. anycast addressing
Source: https://learn.microsoft.com/en-us/windows-server/networking/ipv6/ipv6-multicast-addresses
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