This 350-601 practice question tests your understanding of 350-601 exam topics. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An engineer is configuring OSPF in a data center fabric with multiple Nexus 9000 switches. To ensure fast convergence after a link failure, which OSPF feature should be enabled?
OSPF authentication
Why wrong: Authentication provides security, not convergence.
OSPF Fast Hello
Fast Hello sends hellos at sub-second intervals for fast failure detection.
OSPF LSA throttling
Why wrong: Throttling controls LSA generation, not detection.
OSPF stub area
Why wrong: Stub area reduces LSDB size but does not speed convergence.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
OSPF Fast Hello
OSPF Fast Hello (or BFD) provides faster failure detection than default hello/dead intervals.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
OSPF authentication
Why it's wrong here
Authentication provides security, not convergence.
OSPF Fast Hello
Why this is correct
Fast Hello sends hellos at sub-second intervals for fast failure detection.
Related concept
OSPF neighbours must agree on key parameters.
OSPF LSA throttling
Why it's wrong here
Throttling controls LSA generation, not detection.
OSPF stub area
Why it's wrong here
Stub area reduces LSDB size but does not speed convergence.
Common exam traps
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 350-601 OSPF questions on adjacency and route selection.
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise 350-601 questions linked to Network.
Practise 350-601 questions linked to Compute.
Practise 350-601 questions linked to Storage Network.
Practise 350-601 questions linked to Automation.
Practise 350-601 questions linked to Security.
Practise 350-601 questions linked to 350-601 fundamentals.
Practise 350-601 questions linked to 350-601 scenario.
Practise 350-601 questions linked to 350-601 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
OSPF neighbours must agree on key parameters.
The correct answer is: OSPF Fast Hello — OSPF Fast Hello (or BFD) provides faster failure detection than default hello/dead intervals.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 350-601 OSPF questions on adjacency and route selection.
OSPF neighbours must agree on key parameters.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jul 4, 2026
This 350-601 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 350-601 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.