Multiple choice

Two routers Rtr1 and Rtr2 are both configured with RIP only. What will be the result when Rtr1 receives a routing update that contains a higher cost path to a network already in its routing table?

  1. The update information will replace the existing routing table entry.

  2. The update information will be added to the existing routing table.

  3. The existing routing table entry will be deleted from the routing table and all routers will exchange routing updates to reach convergence.

  4. The update will be ignored and no further action will be taken.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

RIP uses hop count as its metric, and when a router receives a routing update containing a higher cost path to a network already in its routing table, it ignores that update. RIP only installs better (lower hop count) paths. The existing routing table entry remains unchanged because RIP routers do not accept inferior routes - this is fundamental to distance vector behavior where only optimal paths are maintained.

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