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300-410 Practice Question: Which THREE statements about administrative…
Which THREE statements about administrative distance are true when comparing OSPF and EIGRP? (Choose THREE.)
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
✓
By default, EIGRP internal routes are preferred over OSPF routes.
OSPF has a default AD of 110, EIGRP internal routes have 90, and EIGRP external routes have 170. Therefore, EIGRP internal routes are preferred over OSPF, but OSPF is preferred over EIGRP external routes. Administrative distance can be manually changed for either protocol.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
By default, EIGRP internal routes are preferred over OSPF routes.
Why this is correct
EIGRP internal AD is 90, OSPF is 110, so EIGRP is preferred.
- ✓
By default, OSPF routes are preferred over EIGRP external routes.
Why this is correct
OSPF AD is 110, EIGRP external AD is 170, so OSPF is preferred.
- ✓
The administrative distance for OSPF can be changed using the distance ospf command.
Why this is correct
The distance ospf command allows changing AD for intra-area, inter-area, and external routes.
- ✗
EIGRP internal routes have a default administrative distance of 170.
Why it's wrong here
EIGRP internal routes have AD 90; external routes have AD 170.
- ✗
OSPF external routes have a default administrative distance of 110.
Why it's wrong here
OSPF external routes also have AD 110 by default, but they are not preferred over EIGRP internal routes.
Visual reference
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.