Question 404 of 1,958
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350-401 Practice Question: Which two statements about EIGRP route…
Which two statements about EIGRP route summarization are true? (Choose two.)
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
✓
Manual summarization can be configured on a per-interface basis using the ip summary-address eigrp command.
EIGRP supports manual summarization on any interface, which creates a summary route with an administrative distance of 5 by default. Automatic summarization at classful boundaries is disabled by default in modern IOS versions. Manual summarization can be configured per interface and suppresses more specific routes from being advertised out that interface. The summary route is installed in the routing table as a local route.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Manual summarization can be configured on a per-interface basis using the ip summary-address eigrp command.
Why this is correct
Correct because the command 'ip summary-address eigrp <as> <prefix> <mask>' is used to configure manual summarization on an interface.
- ✗
Automatic summarization is enabled by default in EIGRP for IPv4.
Why it's wrong here
Incorrect because automatic summarization is disabled by default in IOS 15.0 and later; it was enabled in older versions but is now off.
- ✓
A manually configured summary route in EIGRP has an administrative distance of 5.
Why this is correct
Correct because the summary route installed by EIGRP manual summarization has an AD of 5, making it preferred over other routes.
- ✗
Manual summarization causes the router to advertise all specific routes in addition to the summary.
Why it's wrong here
Incorrect because manual summarization suppresses the advertisement of more specific routes out of the interface where the summary is configured.
- ✗
EIGRP for IPv6 does not support manual summarization.
Why it's wrong here
Incorrect because EIGRP for IPv6 also supports manual summarization using the 'ipv6 summary-address eigrp' command.
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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Last reviewed: Jun 18, 2026
This 350-401 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 350-401 exam.
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