Which protocol provides the same functions in IPv6 that IGMP provides in IPv4 networks?
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A. B. C. D.C.
The protocol that provides the same functions in IPv6 that IGMP provides in IPv4 networks is MLD (Multicast Listener Discovery).
In IPv4 networks, the Internet Group Management Protocol (IGMP) is used to manage multicast group memberships of hosts. IGMP enables a multicast receiver to inform the local router that it is interested in receiving traffic for a specific multicast group. The router can then forward the multicast traffic only to those interfaces where there are interested receivers.
In IPv6 networks, the multicast group management is performed using Multicast Listener Discovery (MLD). MLD is similar to IGMP, but it is specifically designed for IPv6 multicast groups. MLD operates between IPv6 routers and IPv6 multicast hosts.
When a host wants to join or leave a multicast group, it sends an MLD message to its local router. The router then sends MLD messages to its neighboring routers to inform them about the group membership. This allows the routers to forward multicast traffic only to those interfaces where there are interested receivers.
MLD has two versions: MLDv1 and MLDv2. MLDv1 is used in the same way as IGMPv2 in IPv4 networks, while MLDv2 provides additional features such as source-specific multicast filtering and support for IPv6 multicast addresses with scope beyond the link-local scope.
In conclusion, the correct answer is C. MLD. ICMPv6 (Answer A) is a control protocol that is used for various functions in IPv6 networks, but it is not used for multicast group management. ND (Answer B) stands for Neighbor Discovery, which is used for address resolution and neighbor unreachability detection in IPv6 networks. TLA (Answer D) stands for Top-Level Aggregation, which is not a protocol used in IPv6 networks.