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300-410 Practice Question: Runs the following command to troubleshoot a…
A network engineer runs the following command to troubleshoot a Network Logging and Syslog issue:
R1# debug ip ospf adj
Output: OSPF: 2 Way Communication to 10.0.0.2 on GigabitEthernet0/0, state 2WAY OSPF: Send hello to 224.0.0.5 on GigabitEthernet0/0 OSPF: Rcv DBD from 10.0.0.2 on GigabitEthernet0/0 seq 0x1E opt 0x52 flag 0x7 len 32 OSPF: NBR negotiation done. We are the SLAVE OSPF: Exchange done with 10.0.0.2 on GigabitEthernet0/0 OSPF: Build router LSA for area 0, router ID 10.0.0.1
What does this output indicate?
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 router is successfully forming an OSPF adjacency with neighbor 10.0.0.2.
The debug output shows the OSPF adjacency formation process, including the exchange of database descriptors and LSA building. This indicates successful adjacency formation.
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 router is successfully forming an OSPF adjacency with neighbor 10.0.0.2.
Why this is correct
The sequence shows 2WAY, DBD exchange, and exchange done, indicating a full adjacency is being established.
- ✗
The router is experiencing an OSPF authentication failure.
Why it's wrong here
No authentication errors are shown in the output.
- ✗
The router is stuck in the EXSTART state due to MTU mismatch.
Why it's wrong here
The output shows negotiation done and exchange done, so no MTU issue.
- ✗
The router is flooding LSAs to all neighbors.
Why it's wrong here
The output shows building a router LSA, which is normal, not flooding.
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.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.