Exam 300-420 topic 1 question 135 discussion

I vote C+D based on: https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/Phase_1/mcstmsdp/mcst_p1.html

Interdomain multicast networks such as PIM-SM, MBGP, and MSDP

https://www.arista.com/en/um-eos/eos-multicast-source-discovery-protocol-msdp#:~:text=configuring%20MSDP%20speakers.-,Network%20Configuration,messages%20are%20MSDP%20control%20messages%20that%20peers%20exchange%20during%20peering%20sessions,-.

Answers B and D When designing interdomain multicast, two protocols that are typically deployed to achieve communication between multicast sources and receivers are: BIDIR-PIM (Option B): BIDIR-PIM (Bi-Directional PIM) is a multicast routing protocol that allows multicast traffic to flow in both directions between domains. It uses a shared tree architecture to support interdomain multicast communication. MSDP (Option D): MSDP (Multicast Source Discovery Protocol) is used to exchange information between domains about multicast sources. MSDP allows routers in one domain to learn about multicast sources in other domains and to forward traffic to those sources. MSDP operates at the edge of each domain and is used in conjunction with BIDIR-PIM. In summary, BIDIR-PIM and MSDP are two protocols that are deployed to achieve interdomain multicast communication between multicast sources and receivers.

MSDP (Multicast interdomain discovery protocol) should exchange routing information using BGP (Student learning guide v1.4. p 274)