CISSP: Certified Information Systems Security Professional

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QuestionQ274

VerifiedCommunication and Network Security

Which Wide Area Network (WAN) technology requires the first router along the path to determine the complete route a packet will take, eliminating the need for the other routers on that path to make independent routing decisions?

Explanation

Multiprotocol Label Switching (MPLS) uses label-switched paths. With an explicitly routed LSP, a single label-switching router—typically the ingress router—specifies the path, while subsequent routers forward according to the packet label instead of independently selecting the next hop.

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