Cisco
352-001 · Question #294
352-001 Question #294: Real Exam Question with Answer & Explanation
The correct answer is A: Bidirectional PIM. Bidirectional PIM uses a shared bidirectional tree rooted at the RP, making it ideal for many-to-many multicast applications while minimizing per-source state on routers.
Question
Which multicast technology provides a large, many-to-many connectivity for a new application while minimizing load on the existing network infrastructure?
Options
- ABidirectional PIM
- BPIM Sparse Mode
- CAny-source Multicast
- DSource Specific Multicast
Explanation
Bidirectional PIM uses a shared bidirectional tree rooted at the RP, making it ideal for many-to-many multicast applications while minimizing per-source state on routers.
Common mistakes.
- B. PIM Sparse Mode builds per-source (S,G) trees after initial shared tree use, generating higher router state load in many-to-many scenarios with multiple active sources.
- C. Any-source Multicast (ASM) is a service model that encompasses PIM-SM behavior, not a distinct protocol mechanism that reduces infrastructure load for many-to-many communication.
- D. Source Specific Multicast (SSM) is optimized for one-to-many delivery from a single known source and does not support many-to-many multicast applications.
Concept tested. Bidir-PIM for scalable many-to-many multicast
Reference. https://www.rfc-editor.org/rfc/rfc5015
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