When a router performs the SPF calculation, which router is used as the root of the shortest path tree?

When a router performs the SPF calculation, which router is used 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.

View Answer

Answer: D

Explanation:

When a router performs the SPF (Shortest Path First) calculation, it uses itself as the root of the shortest path tree (SPT). This router computes the shortest paths to all other routers in the network, treating itself as the origin and calculating the paths based on its view of the network.