mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Examine the following EIGRP configuration on…
Examine the following EIGRP configuration on Router R6:
interface GigabitEthernet0/2 ip hello-interval eigrp 100 15 ip hold-time eigrp 100 45
What is the effect of these commands?
⚠ Common exam trap
Candidates often assume the hold time must be a multiple of the hello interval (e.g., 3x), but Cisco does not enforce this mathematically—only that the hold time is greater than the hello interval to avoid premature neighbor loss.
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 will send hello packets every 15 seconds and wait 45 seconds before declaring a neighbor down.
The commands set a non-default hello interval of 15 seconds and a hold time of 45 seconds for EIGRP AS 100 on GigabitEthernet0/2. EIGRP uses the hello interval to determine how often it sends hello packets, and the hold time is the duration the router waits without receiving a hello before declaring the neighbor down. Option A correctly describes this behavior.
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 will send hello packets every 15 seconds and wait 45 seconds before declaring a neighbor down.
Why this is correct
The hello interval is set to 15 seconds, and hold time to 45 seconds.
- ✗
EIGRP will send hello packets every 45 seconds and wait 15 seconds.
Why it's wrong here
The hello interval is 15 seconds, not 45.
- ✗
EIGRP will use the default hello interval of 5 seconds and hold time of 15 seconds.
Why it's wrong here
Explicit configuration overrides defaults.
- ✗
EIGRP will not form neighbor adjacencies because the hold time is not a multiple of the hello interval.
Why it's wrong here
There is no such requirement; hold time can be any value.
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.