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300-410 Practice Question: The default hello interval for OSPFv3 on a…
What is the default hello interval for OSPFv3 on a broadcast network type in Cisco IOS-XE?
⚠ Common exam trap
Cisco often tests the default hello interval for OSPFv3 by making candidates confuse it with OSPFv2 defaults or with the dead interval; the trap here is assuming OSPFv3 uses a different default than OSPFv2 for broadcast networks, when in fact both use 10 seconds.
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
✓
10 seconds
OSPFv3 uses the same default hello interval as OSPFv2 for broadcast and point-to-point network types, which is 10 seconds. This is defined in RFC 5340 and is the default on Cisco IOS-XE for OSPFv3 on broadcast networks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
10 seconds
Why this is correct
Default hello interval for OSPFv3 on broadcast networks is 10 seconds.
- ✗
30 seconds
Why it's wrong here
30 seconds is the default for EIGRP.
- ✗
40 seconds
Why it's wrong here
40 seconds is the default dead interval for OSPF on broadcast networks.
- ✗
5 seconds
Why it's wrong here
5 seconds is not a default OSPF timer.
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 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 300-410 exam.