- A
A stub router advertises only connected and summary routes by default.
Correct because the default stub setting (without keywords) advertises connected and summary routes.
- B
A stub router can still be used as a transit router for other EIGRP neighbors.
Why wrong: Incorrect because stub routers are not used as transit routers; they only advertise specific routes and do not forward traffic for other networks.
- C
The 'eigrp stub' command is configured on the hub router in a hub-and-spoke topology.
Why wrong: Incorrect because the 'eigrp stub' command is configured on the spoke (leaf) routers, not the hub.
- D
EIGRP stub routing reduces query scoping and improves convergence.
Correct because stub routers do not propagate queries, limiting the query domain and speeding up convergence.
- E
A stub router can be configured with the 'receive-only' keyword to advertise all its routes.
Why wrong: Incorrect because 'receive-only' prevents the stub router from advertising any routes; it only receives routes.
350-401 EIGRP Practice Question
This 350-401 practice question tests your understanding of eigrp. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 stub routing 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
A stub router advertises only connected and summary routes by default.
EIGRP stub routing limits the routes a stub router advertises, preventing it from being used as a transit router. Common stub types include connected, static, summary, and receive-only.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A stub router advertises only connected and summary routes by default.
Why this is correct
Correct because the default stub setting (without keywords) advertises connected and summary routes.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
A stub router can still be used as a transit router for other EIGRP neighbors.
Why it's wrong here
Incorrect because stub routers are not used as transit routers; they only advertise specific routes and do not forward traffic for other networks.
- ✗
The 'eigrp stub' command is configured on the hub router in a hub-and-spoke topology.
Why it's wrong here
Incorrect because the 'eigrp stub' command is configured on the spoke (leaf) routers, not the hub.
- ✓
EIGRP stub routing reduces query scoping and improves convergence.
Why this is correct
Correct because stub routers do not propagate queries, limiting the query domain and speeding up convergence.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
A stub router can be configured with the 'receive-only' keyword to advertise all its routes.
Why it's wrong here
Incorrect because 'receive-only' prevents the stub router from advertising any routes; it only receives routes.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Trap categories for this question
Command / output trap
Incorrect because the 'eigrp stub' command is configured on the spoke (leaf) routers, not the hub.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 350-401 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 350-401 question test?
EIGRP — This question tests EIGRP — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: A stub router advertises only connected and summary routes by default. — EIGRP stub routing limits the routes a stub router advertises, preventing it from being used as a transit router. Common stub types include connected, static, summary, and receive-only.
What should I do if I get this 350-401 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 350-401 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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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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