Which two design options meet the requirement to provide IPv6 inter domain multicast? (Choose two)

Question

Options

• APIM SSM
• BPIM dense mode
• CAuto-RP
• Danycast
• Eembedded RP

• A
  79% (15)
• B
  5% (1)
• C
  5% (1)
• D
  11% (2)

Explanation

The two correct options are (A) PIM SSM (Protocol Independent Multicast – Source-Specific Multicast) and (E) Embedded RP. PIM SSM avoids Rendezvous Point (RP) dependency entirely by using (S,G) channel subscriptions directly, making it inherently suited for inter-domain deployments where cross-domain RP discovery would otherwise be a problem. Embedded RP is an IPv6-specific mechanism that encodes the RP's address directly inside the IPv6 multicast group address (RFC 3956), allowing routers in any domain to automatically derive the RP without needing MSDP or manual cross-domain RP configuration. Together, these two approaches elegantly solve the inter-domain RP discovery problem. PIM Dense Mode (B) is not scalable for inter-domain use due to its flood-and-prune behavior. Auto-RP (C) is an IPv4-only Cisco proprietary protocol. Anycast (D) is an addressing/routing strategy, not a multicast routing protocol, and does not by itself provide inter-domain IPv6 multicast.

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