easyMultiple ChoiceObjective-mapped
300-410 Practice Question: The default administrative distance for internal…
What is the default administrative distance for internal EIGRP routes?
⚠ Common exam trap
Cisco often tests the distinction between internal and external EIGRP administrative distances, so the trap here is that candidates may confuse the default AD of 170 for external EIGRP routes with the AD of 90 for internal EIGRP routes.
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
✓
90
The default administrative distance for internal Enhanced Interior Gateway Routing Protocol (EIGRP) routes is 90. This value is used by Cisco routers to select the best path when multiple routing protocols provide route information for the same destination network, with a lower administrative distance being preferred over a higher one.
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 this is correct
Internal EIGRP routes have a default AD of 90.
- ✗
110
Why it's wrong here
110 is the default AD for OSPF.
- ✗
120
Why it's wrong here
120 is the default AD for RIP.
- ✗
170
Why it's wrong here
170 is the default AD for external EIGRP 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.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 300-410 question from scratch — 1,966 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.