mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Which statement correctly describes the behavior…
Which statement correctly describes the behavior of the 'default-information originate' command in OSPF?
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 injects a default route as a Type 5 LSA only if a default route exists in the routing table.
The 'default-information originate' command in OSPF generates a default route (0.0.0.0/0) as a Type 5 LSA, but only if a default route exists in the routing table, unless the 'always' keyword is used.
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 always injects a default route into OSPF regardless of the routing table.
Why it's wrong here
This is only true if the 'always' keyword is added; without it, a default route must already exist.
- ✗
It injects a default route as a Type 3 LSA.
Why it's wrong here
The default route is injected as a Type 5 LSA (external), not Type 3 (summary).
- ✓
It injects a default route as a Type 5 LSA only if a default route exists in the routing table.
Why this is correct
By default, OSPF requires an existing default route to originate a Type 5 LSA for 0.0.0.0/0.
- ✗
It injects a default route as a Type 7 LSA in all OSPF areas.
Why it's wrong here
Type 7 LSAs are used only in NSSA areas, and 'default-information originate' does not automatically use Type 7.
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.