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350-401 EIGRP Practice Question

This 350-401 practice question tests your understanding of eigrp. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.

A network engineer runs the following command on Router R1:

R1# show ip eigrp topology

EIGRP-IPv4 Topology Table for AS(100)/ID(192.168.1.1) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status

P 10.1.1.0/24, 1 successors, FD is 1310720 via 192.168.1.2 (1310720/1310720), GigabitEthernet0/0 P 10.2.2.0/24, 1 successors, FD is 1310720 via 192.168.1.2 (1310720/1310720), GigabitEthernet0/0 P 10.3.3.0/24, 1 successors, FD is 1310720 via 192.168.1.2 (1310720/1310720), GigabitEthernet0/0

Based on this output, what can be concluded?

Question 1mediummultiple choice
Study the full EIGRP explanation →

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

✓

Each route has exactly one successor and no feasible successor.

The output shows each route with a code 'P' (Passive) and exactly one successor, with no feasible successor listed. In EIGRP, a feasible successor is only present if there is a backup route that satisfies the feasibility condition (reported distance < feasible distance). Since only one next-hop is shown per route and no additional entries exist, there is no feasible successor. Option C correctly identifies this.

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.

  • ✗

    All routes have a feasible successor.

    Why it's wrong here

    A feasible successor requires the reported distance to be less than the feasible distance; here they are equal, so no feasible successor.

  • ✗

    The routes are in Active state, meaning the router is querying for alternate paths.

    Why it's wrong here

    The 'P' code indicates Passive state, not Active.

  • ✓

    Each route has exactly one successor and no feasible successor.

    Why this is correct

    The output shows one successor per route and the RD equals the FD, so no feasible successor.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The router is using EIGRP stub routing.

    Why it's wrong here

    The output does not indicate stub configuration; stub behavior is not visible in the topology table.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Cisco often tests the distinction between Passive and Active states in EIGRP topology table output, where candidates mistakenly think 'P' stands for 'Primary' or 'Path' instead of 'Passive', leading them to misinterpret the route state and miss the absence of feasible successors.

Trap categories for this question

  • Command / output trap

    The output does not indicate stub configuration; stub behavior is not visible in the topology table.

Detailed technical explanation

How to think about this question

EIGRP's feasibility condition ensures loop-free paths: a feasible successor must have a reported distance (RD) less than the current feasible distance (FD). In this output, the FD equals the RD (1310720/1310720), meaning the next-hop router's distance to the destination is the same as the local router's FD, which prevents any other path from being a feasible successor. In real-world scenarios, this often occurs in hub-and-spoke topologies where only one path exists, and engineers must rely on other mechanisms like load balancing or summarization to improve redundancy.

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.

TExam Day Tips

  • 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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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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: Each route has exactly one successor and no feasible successor. — The output shows each route with a code 'P' (Passive) and exactly one successor, with no feasible successor listed. In EIGRP, a feasible successor is only present if there is a backup route that satisfies the feasibility condition (reported distance < feasible distance). Since only one next-hop is shown per route and no additional entries exist, there is no feasible successor. Option C correctly identifies this.

What should I do if I get this 350-401 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 24, 2026

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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.