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200-901 Practice Question: Which THREE factors influence the convergence…
Which THREE factors influence the convergence time of OSPF in a large enterprise network? (Choose three.)
⚠ Common exam trap
Cisco often tests the distinction between failure detection mechanisms (like BFD or Hello timers) and actual convergence processes (SPF calculation and LSA propagation), so candidates may mistakenly think BFD directly reduces convergence time rather than just detection time.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CPU processing power for SPF calculations
CPU processing power for SPF calculations directly affects convergence time because OSPF must run the Dijkstra algorithm to compute the shortest path tree after a topology change. In large networks with many routers and LSAs, a slower CPU increases the time to complete SPF, delaying route convergence.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
CPU processing power for SPF calculations
Why this is correct
SPF computation time affects convergence.
- ✓
Hello and dead interval timers
Why this is correct
Shorter timers speed failure detection.
- ✗
Bidirectional Forwarding Detection (BFD) implementation
Why it's wrong here
BFD is not part of OSPF itself.
- ✗
DUAL algorithm processing time
Why it's wrong here
DUAL is used by EIGRP, not OSPF.
- ✓
LSA propagation delay across the network
Why this is correct
Flooding LSAs takes time.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.