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300-410 Practice Question: Which THREE commands can be used to verify the…
Which THREE commands can be used to verify the operational state of a BFD session? (Choose THREE.)
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
✓
show bfd neighbors
The show bfd neighbors command displays all BFD neighbors and their session states. show bfd interface details shows BFD configuration and state per interface. show bfd session displays detailed session information including timers and statistics. show ip ospf bfd is not a valid command; the correct command is show ip ospf [interface] to see BFD status. show bfd peer is a valid command on some platforms but is less common; show bfd neighbors is preferred.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
show bfd neighbors
Why this is correct
Correct. This command lists all BFD neighbors and their current session state (Up, Down, etc.).
- ✓
show bfd interface details
Why this is correct
Correct. This command shows BFD configuration and state for each interface, including timers and session counts.
- ✓
show bfd session
Why this is correct
Correct. This command provides detailed information about each BFD session, including local and remote discriminators, timers, and statistics.
- ✗
show ip ospf bfd
Why it's wrong here
Incorrect. There is no such command. To verify BFD for OSPF, use show ip ospf interface or show bfd neighbors.
- ✗
show bfd peer
Why it's wrong here
Incorrect. While show bfd peer exists on some platforms (e.g., IOS-XR), the standard IOS command is show bfd neighbors.
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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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.