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300-410 Practice Question: The default administrative distance for routes…
What is the default administrative distance for routes redistributed into EIGRP from another protocol?
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
✓
170
By default, EIGRP assigns an administrative distance of 170 to routes learned via redistribution, distinguishing them from internal EIGRP routes (AD 90) and external EIGRP routes (AD 170).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
90
Why it's wrong here
90 is the default administrative distance for internal EIGRP routes, not redistributed routes.
- ✗
110
Why it's wrong here
110 is the default administrative distance for OSPF, not for redistributed EIGRP routes.
- ✓
170
Why this is correct
Cisco IOS assigns a default administrative distance of 170 to all routes redistributed into EIGRP, matching the distance of external EIGRP routes.
- ✗
200
Why it's wrong here
200 is not a default administrative distance for any common IGP; it may be used for static routes in some configurations.
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.