What does an LHR do after it receives an IGMP join from a receiver?
- It sends a PIM register message toward the RP.
- It sends a PIM join toward the RP.
- It sends a PIM register message toward the source.
- It sends a PIM join message toward the source.
Explanation: The last-hop router (LHR) is a router that is directly attached to the receivers. It is responsible for sending PIM joins upstream toward the RP or to the source after an SPT switchover.
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