hardMultiple Choice
300-410 Practice Question: The default administrative distance for a route…
What is the default administrative distance for a route learned via the Routing Information Protocol next generation (RIPng)?
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
✓
120
RIPng, the IPv6 version of RIP, uses the same default administrative distance as RIPv2, which is 120.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
120
Why this is correct
RIPng inherits RIP's default administrative distance of 120, matching the IPv4 value. Cisco assigns this to all RIP-learned routes, so the constraint in the stem — the default distance for RIPng specifically — is satisfied by 120 rather than 110 (OSPF) or 115 (IS-IS).
- ✗
110
Why it's wrong here
RIPng's default administrative distance is 120, not 110. The value 110 belongs to Open Shortest Path First, so selecting it confuses two interior gateway protocols. OSPF would carry 110 in a scenario asking about link-state routing within a single autonomous system, but the stem specifies RIPng.
- ✗
100
Why it's wrong here
An administrative distance of 100 is assigned to routes learned by the Interior Gateway Routing Protocol (IGRP), not RIPng. RIPng uses a default administrative distance of 120, making 100 incorrect for this scenario. This option tempts because 100 is the default distance for IGRP, a legacy Cisco-proprietary distance-vector protocol, and would be correct if the question asked about IGRP instead of RIPng.
- ✗
170
Why it's wrong here
RIPng uses administrative distance 120; 170 is assigned to external Exterior Gateway Protocol routes, specifically EIGRP external. Choosing 170 conflates a distance-vector interior protocol with redistributed external routes. 170 would be correct only where the stem asked about routes redistributed into EIGRP from another routing domain.
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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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.