What is the purpose of LISP's routing and addressing architecture?
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Correct answer: It creates two entries for each network node, one for its identity and another for its location on the network..
Why this is the answer
LISP (Locator/ID Separation Protocol) fundamentally separates the identity of an endpoint (Endpoint Identifier or EID) from its location on the network (Routing Locator or RLOC). This dual-entry system allows an EID to remain constant even if its RLOC changes, facilitating mobility and multihoming without requiring changes to the global routing table. The other options describe different network functionalities: network virtualization overlays (like VXLAN or NVGRE), VRF-Lite or MPLS VPNs for multiple routing tables, and multicast replication, none of which are the primary architectural purpose of LISP's ID/locator separation.
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