300-510 · Question #295
Which PIM message populates the outgoing interface list?
The correct answer is B. join. In PIM Sparse Mode, routers send Join messages upstream toward the RP (or source) to signal interest in a particular (S,G) or (*,G). Each router that receives a Join adds the interface on which the Join arrived into its outgoing-interface list (OIL) for that multicast state, ensu
Question
Which PIM message populates the outgoing interface list?
Options
- Aassert
- Bjoin
- Cregister
- Dhello
How the community answered
(28 responses)- A4% (1)
- B89% (25)
- D7% (2)
Explanation
In PIM Sparse Mode, routers send Join messages upstream toward the RP (or source) to signal interest in a particular (S,G) or (*,G). Each router that receives a Join adds the interface on which the Join arrived into its outgoing-interface list (OIL) for that multicast state, ensuring that multicast packets are forwarded downstream only where needed.
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