4A0-112: Nokia IS-IS Routing ProtocolDemo

By Nokia · Question Mode

QuestionQ24

SR OS Control Plane Security

When a router carries out the SPF calculation, which router serves as the root of the shortest-path tree?

  • A The router with the fewest links.
  • B The router with the lowest router ID.
  • C The router’s closest neighbor.
  • D The router doing the calculation.
Explanation

Each OSPF router independently calculates a shortest-path tree rooted at itself, using the link-state database to determine the lowest-cost paths to all destinations.

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