hardMultiple ChoiceObjective-mapped
300-410 Practice Question: An engineer configures OSPFv3 with multiple areas
An engineer configures OSPFv3 with multiple areas. On the ABR, routes from area 1 are not being advertised into area 0. Which is the most likely explanation?
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
✓
The ABR does not have a direct interface in area 0.
OSPFv3 requires that the ABR have a direct connection to area 0. If the ABR is not directly connected to area 0, it will not advertise inter-area routes. Additionally, OSPFv3 uses the same rule as OSPFv2: an ABR must have at least one interface in area 0 to function as an ABR.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The ABR does not have a direct interface in area 0.
Why this is correct
An ABR must be directly connected to area 0 to advertise routes between areas.
- ✗
The ABR has a higher router ID than the other routers.
Why it's wrong here
Router ID does not affect inter-area route advertisement.
- ✗
The OSPFv3 process is configured with the 'no-redistribution' command.
Why it's wrong here
No-redistribution affects redistribution, not inter-area routes.
- ✗
The ABR is configured as a stub router.
Why it's wrong here
A stub router would still advertise inter-area routes.
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.