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300-410 Practice Question: The default dead interval multiplier for OSPFv3?
What is the default dead interval multiplier for OSPFv3?
⚠ Common exam trap
Cisco often tests the default dead interval multiplier for OSPFv3 by making candidates confuse it with the OSPFv2 default multiplier (which is also 4) or with the EIGRP default multiplier of 3, leading to selection of option A.
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
✓
4
In OSPFv3, the default dead interval multiplier is 4, meaning the router dead interval is calculated as 4 times the hello interval. This is defined in RFC 5340 and is consistent with OSPFv2 behavior, ensuring that a neighbor is declared down after missing four consecutive hello packets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
3
Why it's wrong here
3 is not the default multiplier.
- ✓
4
Why this is correct
The default dead interval multiplier is 4, resulting in a dead interval of 40 seconds on broadcast networks.
- ✗
5
Why it's wrong here
5 is not the default multiplier.
- ✗
2
Why it's wrong here
2 is not the default multiplier.
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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JA
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.