mediumMultiple Choice
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show ip ospf virtual-links
Virtual Link OSPF_VL0 to router 10.1.1.3 is up Run as demand circuit DoNotAge LSA allowed. Transit area 1, via interface GigabitEthernet0/0, Cost of using 10 Transmit Delay is 1 sec, State POINT_TO_POINT, Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:08 Adjacency State FULL
Based on this output, what can be concluded?
⚠ Common exam trap
The trap is misreading the output: candidates see 'Transit area 1' and assume it should be area 0, or confuse the Transmit Delay value (1 sec) with the link cost (10).
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
✓
The virtual link is functioning correctly and the adjacency is full.
The output shows 'Virtual Link OSPF_VL0 to router 10.1.1.3 is up' and 'Adjacency State FULL', which means the virtual link has successfully formed an OSPF adjacency across the transit area. The transit area is explicitly listed as area 1, not area 0, and the cost is 10, confirming the link is operational and correctly configured.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The virtual link is using area 0 as the transit area.
Why it's wrong here
The output states Transit area 1, meaning the virtual link is tunnelled through area 1, not the backbone. It is tempting because virtual links connect to area 0, but area 0 is the endpoint both routers must share, and would be correct only if the transit area field read 0.0.0.0.
- ✓
The virtual link is functioning correctly and the adjacency is full.
Why this is correct
The output shows OSPF_VL0 in state up with Adjacency State FULL, confirming the virtual link traversing transit area 1 has successfully formed an adjacency with router 10.1.1.3. Hello and Dead timers match, and the demand circuit and DoNotAge LSA flags indicate normal operation, satisfying the requirement for area 0 connectivity through the transit area.
- ✗
Router R1 is not receiving hello packets on the virtual link.
Why it's wrong here
The output shows Hello due in 00:00:08 and Adjacency State FULL, proving hellos are exchanged and received. It is tempting because a virtual link traverses a transit area rather than a direct link, and would be correct if the adjacency were stuck in INIT or EXSTART with no hello timer scheduled.
- ✗
The virtual link has a cost of 1.
Why it's wrong here
The line reads Cost of using 10, the cumulative OSPF cost across the transit area to the remote endpoint, not 1. It is tempting because Transmit Delay is 1 sec appears nearby, and a cost of 1 would be correct only if the transit path's interface costs summed to one.
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.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 300-410 question from scratch — 1,401 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
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.