mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to verify BFD with…
A network engineer runs the following command to verify BFD with EIGRP:
R1# show ip eigrp 100 topology 10.2.2.0/24
EIGRP-IPv4 Topology Entry for AS(100)/ID(10.2.2.0/24) State: Passive, Query origin flag: 1, 1 Successor(s), FD is 131072 Descriptor Blocks:
10.1.1.2 (GigabitEthernet0/0), from 10.1.1.2, Send flag: 0x0
Composite metric: (131072/130816), Route is Internal Vector metric: Minimum bandwidth is 100000 Kbit Total delay is 100 microseconds Reliability is 255/255 Load is 1/255 Minimum MTU is 1500 Hop count is 1 Originating router is 2.2.2.2 BFD enabled, BFD state: UP
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
✓
EIGRP is using BFD with state UP, providing sub-second convergence.
The output shows that BFD is enabled for the EIGRP neighbor and the BFD state is UP, indicating fast failure detection is active for this route.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
EIGRP is using BFD with state UP, providing sub-second convergence.
Why this is correct
BFD is enabled and UP, allowing EIGRP to detect failures faster than EIGRP hello/dead timers.
- ✗
EIGRP has no BFD session for this neighbor.
Why it's wrong here
The output explicitly states 'BFD enabled, BFD state: UP'.
- ✗
BFD is down, so EIGRP relies on its own hello/dead timers.
Why it's wrong here
BFD state is UP, not down.
- ✗
EIGRP is using BFD in passive mode only.
Why it's wrong here
The state is UP, indicating active BFD session.
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.