Which function do reverse path forwarding mechanisms perform in a multicast deployment?

Which function do reverse path forwarding mechanisms perform in a multicast deployment?
A . They notify the upstream routerof multicast traffic.
B. They send PIM prune message toward multicast sources.
C. They eliminate overlapping multicast addresses
D. They prevent loops and duplicate packets.

View Answer

Answer: D

Explanation:

Reverse path forwarding (RPF) mechanisms are used to prevent loops and duplicate packets in multicast deployments [1]. The RPF check verifies that all multicast traffic received on a router is sourced from the expected direction, ensuring that multicast traffic is not looped back in the network. The RPF check works by comparing the source IP address of a multicast packet with the routing table, and only forwarding it if it matches the expected entry.