mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Examine this configuration: ``` router ospf 1…
Examine this configuration: ```
router ospf 1
distance ospf intra-area 150 inter-area 160 external 170 ``` What is the effect of this command?
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
✓
It sets the administrative distance for intra-area OSPF routes to 150, inter-area to 160, and external to 170.
This command sets different administrative distances for different OSPF route types: intra-area to 150, inter-area to 160, external to 170.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It sets the administrative distance for all OSPF routes to 150.
Why it's wrong here
The command specifies three different distances.
- ✓
It sets the administrative distance for intra-area OSPF routes to 150, inter-area to 160, and external to 170.
Why this is correct
This is the correct syntax and effect.
- ✗
It sets the administrative distance for OSPF routes to 150, but only for routes learned from area 1.
Why it's wrong here
No area qualification is used.
- ✗
It sets the administrative distance for OSPF external routes to 170 and leaves intra-area and inter-area at default.
Why it's wrong here
All three are explicitly set.
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
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