In IPv6, which concept serves as the closest equivalent to broadcast, given that IPv6 does not use broadcast?

In IPv6, which concept serves as the closest equivalent to broadcast, given that IPv6 does not use broadcast?

• A. Link-local
• B. Global Unicast
• C. Multicast
• D. Anycast

Answer: (A)

IPv6 gets rid of broadcast and uses multicast to reach multiple hosts. To mimic a broadcast on a single link, you send to the all-nodes multicast group, which has a link-local scope, meaning the traffic stays on the local link. That scope restriction is what makes it feel like broadcasting within one network segment. So the closest concept to a broadcast in IPv6 is link-local, because it defines the local-link scope for the multicast delivery. Multicast is the mechanism, but the important aspect here is the link-local scope that confines the reach to the local network.

IPv6 gets rid of broadcast and uses multicast to reach multiple hosts. To mimic a broadcast on a single link, you send to the all-nodes multicast group, which has a link-local scope, meaning the traffic stays on the local link. That scope restriction is what makes it feel like broadcasting within one network segment. So the closest concept to a broadcast in IPv6 is link-local, because it defines the local-link scope for the multicast delivery. Multicast is the mechanism, but the important aspect here is the link-local scope that confines the reach to the local network.