Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 293

How is MSDP used to interconnect multiple PIM-SM domains?

Answer options

• A. MSDP allows a rendezvous point to dynamically discover active sources outside of its domain.
• B. MSDP SA request messages are used to request a list of active sources for a specific group.
• C. MSDP depends on BGP or multiprotocol BGP for interdomain operation.
• D. MSDP messages are used to advertise active sources in a domain.

Correct answer: A

Explanation

The correct answer is A because MSDP facilitates the dynamic discovery of active multicast sources in other domains, which is essential for interconnecting PIM-SM domains. Options B and D describe MSDP's role in source discovery and advertisement but do not directly address the interconnection aspect. Option C is incorrect as MSDP operates independently of BGP or multiprotocol BGP for its primary function.