When designing interdomain multicast, which two protocols are deployed to achieve communication between multicast sources and receivers? (Choose two.)

Question

Options

• AIGMPv2
• BBIDIR-PIM
• CMP-BGP
• DMSDP
• EMLD

• A
  3% (1)
• B
  18% (6)
• C
  71% (24)
• E
  9% (3)

Explanation

Interdomain multicast involves connecting separate multicast routing domains (often different autonomous systems) so that sources in one domain can reach receivers in another. Two protocols are essential for this: (1) MSDP (Multicast Source Discovery Protocol) allows Rendezvous Points (RPs) in different PIM-SM domains to share information about active multicast sources, enabling receivers in one domain to learn about sources in another. (2) MP-BGP (Multiprotocol BGP) carries multicast reachability information (MBGP address family) between autonomous systems, enabling inter-domain multicast routing table exchange. IGMPv2 (A) and MLD (E) operate between hosts and their local router and play no interdomain role. BIDIR-PIM (B) is an intra-domain protocol that does not address cross-domain source discovery.

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