Alcatel-Lucent NRS II – Multicast Routing — Question 3

What message does the diverging router (router where the shared and Source Path Trees diverge) generate to stop the multicast traffic arriving via the RP?

Answer options

• A. PIM (*, G) Join
• B. IGMP (*, G) Join
• C. PIM Hello
• D. PIM (*, G) RP-bit prune
• E. PIM (*, G) RP-bit prune

Correct answer: D

Explanation

The correct answer is D, as the PIM (*, G) RP-bit prune message is specifically used to inform upstream routers to stop sending multicast traffic from the Rendezvous Point (RP). The other options, such as PIM (*, G) Join and IGMP (*, G) Join, are related to joining multicast groups rather than stopping traffic, while PIM Hello is used for neighbor discovery in PIM networks.