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300-410 Practice Question: Which OSPF LSA type is used to advertise a…
Which OSPF LSA type is used to advertise a summary route for a network outside the area but within the same OSPF domain?
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
✓
Type 3
Type 3 LSAs (Summary LSAs) are generated by Area Border Routers (ABRs) to advertise inter-area routes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Type 1
Why it's wrong here
Type 1 LSAs are Router LSAs, used for intra-area routes.
- ✗
Type 2
Why it's wrong here
Type 2 LSAs are Network LSAs, used for transit networks.
- ✓
Type 3
Why this is correct
Type 3 LSAs are Summary LSAs, used for inter-area routes.
- ✗
Type 5
Why it's wrong here
Type 5 LSAs are AS External LSAs, used for routes redistributed from other routing domains.
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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JA
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.