Exam 400-007 Topic 2 Question 250 Discussion

Actual exam question for Cisco's 400-007 exam
Question #: 250
Topic #: 2
Company XYZ has a multicast domain that spans across multiple autonomous systems. The company wants a simplified and controlled approach to interconnecting multicast domains. Which technology is the best fit?

Suggested Answer: A Vote an answer

* A (MSDP - Multicast Source Discovery Protocol):MSDP allows different autonomous systems to share multicast source information while maintaining their own PIM Sparse Mode domains. It simplifies interdomain multicast routing without requiring full mesh peering or shared RPs between domains.
Other options explained:
* B: SSM does not require MSDP but limits use to source-specific groups.
* C: MPLS is a transport technology, not multicast control-plane solution.
* D: PIM-SM is used within a domain, not across multiple autonomous systems.

by Leila at Jul 21, 2026, 10:02 AM

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