4A0-116: Nokia Segment Routing Exam

Flex-Algo distributes a common Flexible Algorithm Definition so routers compute paths that satisfy its topology and metric constraints. Traffic can then be steered using a Flex-Algo Prefix SID, which can reduce the MPLS label-stack depth—potentially to a single segment—compared with an SR-TE LSP that encodes an explicit path as a stack of segments. Flex-Algo is a reduced form of traffic engineering, not a mechanism for independently assigning each LSP its own constraint set.