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4A0-C01 · Question #75

Click the exhibit button. What triggers convergence of the routing protocol when the link between switch 1 and switch 2 goes down?

The correct answer is A. Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hello timeouts. At this point, both routers R1 and R2 re-compute. See the full explanation below for the reasoning.

Question

Click the exhibit button. What triggers convergence of the routing protocol when the link between switch 1 and switch 2 goes down?

Exhibit

4A0-C01 question #75 exhibit

Options

  • AConvergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hello timeouts. At this point, both routers R1 and R2 re-compute
  • BConvergence is triggered when the physical interfaces between routers R1 and R2 go down. At this point, both routers R1 and R2 re-compute their link state
  • CConvergence will not be triggered because switches cannot run routing protocols between them.
  • DConvergence is triggered when the switches notify the routers about the link state information. At this point, both routers R1 and R2 re-compute their link state
  • EConvergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down. At this point, both routers R1 and R2 re-compute

How the community answered

(30 responses)
  • A
    80% (24)
  • B
    7% (2)
  • D
    10% (3)
  • E
    3% (1)

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