In LISP, which device receives and decapsulates LISP-encapsulated packets for endpoints inside a LISP site?
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Correct answer: ETR.
Why this is the answer
The ETR (Egress Tunnel Router) is responsible for receiving LISP-encapsulated packets from the LISP infrastructure, decapsulating them, and forwarding the original IP packets to the destination endpoints within its LISP site. It acts as the exit point from the LISP tunnel. The ITR (Ingress Tunnel Router) encapsulates packets entering the LISP domain. The MS (Map Server) stores EID-to-RLOC mappings, and the MR (Map Resolver) is queried by ITRs to find these mappings. Neither the MS nor the MR handles packet encapsulation or decapsulation.
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