mediumMultiple ChoiceObjective-mapped
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 neighbor Neighbor ID Pri State Dead Time Address Interface 192.168.1.2 1 FULL/DR 00:00:35 192.168.1.2 Gi0/0 192.168.2.2 1 2WAY/DROTHER 00:00:38 192.168.2.2 Gi0/1 10.10.10.2 1 FULL/BDR 00:00:32 10.10.10.2 Gi0/2
Based on this output, what is a potential issue?
⚠ Common exam trap
Cisco often tests the misconception that the 2WAY state is always a problem, but in reality it is a normal and expected state for DROTHER neighbors on broadcast multi-access networks, and candidates must recognize that only the DR and BDR should be in FULL state with all neighbors.
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
✓
All OSPF neighbors are in appropriate states for their roles.
The output shows normal OSPF neighbor states for a multi-access network. The DR (192.168.1.2) is in FULL/DR state, the BDR (10.10.10.2) is in FULL/BDR state, and the DROTHER (192.168.2.2) is in 2WAY/DROTHER state, which is expected for a non-DR/non-BDR router on a broadcast multi-access segment. The 2WAY state is a valid and stable state for DROTHER neighbors, indicating that they have exchanged Hello packets and are aware of each other but do not form full adjacency with each other.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Neighbor 192.168.2.2 is stuck in 2WAY state, indicating a problem.
Why it's wrong here
2WAY is a normal state for DROTHER neighbors.
- ✗
The DR election is incomplete on Gi0/0.
Why it's wrong here
The state is FULL/DR, which is correct.
- ✓
All OSPF neighbors are in appropriate states for their roles.
Why this is correct
Each neighbor is in the correct state based on its role (DR, BDR, DROTHER).
- ✗
Neighbor 10.10.10.2 should be in FULL/DR state.
Why it's wrong here
It is the BDR, so FULL/BDR is correct.
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.