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352-001 · Question #313
352-001 Question #313: Real Exam Question with Answer & Explanation
The correct answer is A: constant interface flapping. Interface flapping, inconsistent topology states, and transport networks that suppress Loss of Signal are three well-known factors that prevent routing protocols from reaching a stable converged state quickly.
Question
Which three factors slow down network convergence? (Choose three.)
Options
- Aconstant interface flapping
- Black of redundant paths
- Cinconsistent topology states between routers
- Dtransport network failing to generate LoS
- Ewrong summarization in ABRs
Explanation
Interface flapping, inconsistent topology states, and transport networks that suppress Loss of Signal are three well-known factors that prevent routing protocols from reaching a stable converged state quickly.
Common mistakes.
- B. Lack of redundant paths does not slow the convergence process itself - the network converges quickly to a state where no alternate route exists; redundancy affects availability and resilience, not the speed of convergence.
- E. Incorrect summarization at ABRs can cause reachability problems or suboptimal routing decisions, but it does not introduce delays in the protocol mechanisms that detect and propagate topology changes.
Concept tested. Factors that impede routing protocol convergence speed
Reference. https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13684-12.html
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