- A
Manual summarization can be configured on a per-interface basis using the ip summary-address eigrp command.
Correct because the command 'ip summary-address eigrp <as> <prefix> <mask>' is used to configure manual summarization on an interface.
- B
Automatic summarization is enabled by default in EIGRP for IPv4.
Why wrong: Incorrect because automatic summarization is disabled by default in IOS 15.0 and later; it was enabled in older versions but is now off.
- C
A manually configured summary route in EIGRP has an administrative distance of 5.
Correct because the summary route installed by EIGRP manual summarization has an AD of 5, making it preferred over other routes.
- D
Manual summarization causes the router to advertise all specific routes in addition to the summary.
Why wrong: Incorrect because manual summarization suppresses the advertisement of more specific routes out of the interface where the summary is configured.
- E
EIGRP for IPv6 does not support manual summarization.
Why wrong: Incorrect because EIGRP for IPv6 also supports manual summarization using the 'ipv6 summary-address eigrp' command.
Quick Answer
The correct answer is that a manually configured summary route in EIGRP has an administrative distance of 5. This is because manual summarization creates a local discard route on the router, and EIGRP assigns an administrative distance of 5 to these locally generated summary routes to ensure they are preferred over any learned routes. On the ENCOR 350-401 exam, this concept tests your understanding of how EIGRP handles both manual and automatic route summarization, with a common trap being that automatic summarization at classful boundaries is disabled by default in modern IOS versions, so candidates often mistakenly assume it is still active. Manual summarization is configured per interface and suppresses more specific routes from being advertised out that interface, which is a key distinction from automatic summarization. A helpful memory tip: think of the number 5 as the “local summary” distance—just like a local route, it gets the highest trust.
350-401 EIGRP Practice Question
This 350-401 practice question tests your understanding of eigrp. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
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.
- ✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
Incorrect because EIGRP for IPv6 also supports manual summarization using the 'ipv6 summary-address eigrp' command.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 350-401 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which 350-401 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this 350-401 question test?
EIGRP — This question tests EIGRP — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this 350-401 question wrong?
Identify which 350-401 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which three statements about EIGRP route summarization are true? (Choose three.)
hard- ✓ A.Manual summarization is configured using the 'ip summary-address eigrp <as> <prefix> <mask>' command on an interface.
- B.Automatic summarization is enabled by default in EIGRP for IPv4.
- ✓ C.A manual summary route is advertised with a metric equal to the best metric among the component routes.
- D.Summary routes are always preferred over more specific routes in the routing table.
- ✓ E.EIGRP will install a discard route (null0) for the summary prefix to prevent routing loops.
Why A: EIGRP supports manual summarization on any interface and automatic summarization at classful boundaries (disabled by default in modern IOS). Summary routes are advertised with a metric based on the component routes.
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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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