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352-001 · Question #330
352-001 Question #330: Real Exam Question with Answer & Explanation
The correct answer is A: the tuning of OSPF LSA timers. OSPF convergence time is primarily driven by how fast the network detects, floods, and recalculates topology changes, making LSA timer settings and router processing speed the dominant factors.
Question
Which two factors can significantly affect the OSPF network convergence time? (Choose two.)
Options
- Athe tuning of OSPF LSA timers
- Bthe number of OSPF routes
- Cthe diameter of the OSPF network
- Ddifferent processor capabilities of devices
Explanation
OSPF convergence time is primarily driven by how fast the network detects, floods, and recalculates topology changes, making LSA timer settings and router processing speed the dominant factors.
Common mistakes.
- B. The number of OSPF routes increases SPF computation complexity, but this effect is already captured by the processor capability factor in D and is not an independently controllable design variable that significantly drives convergence time on its own.
- C. Network diameter determines how many hops an LSA must traverse during flooding and adds some propagation delay, but this delay is typically small compared to the impact of LSA timer settings and is not a primary convergence factor.
Concept tested. OSPF convergence time factors and timer tuning
Reference. https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13689-17.html
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