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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

R1 R2 R3 R4 10 100 10 100 OSPF picks R1→R2→R4 (cost 20) over R1→R3→R4 (cost 200)

Quick reference

Routing Protocol Comparison

ProtocolMetricMax HopsAlgorithmType
RIP v2Hop count15Bellman-FordDistance vector
OSPFCost (bandwidth)UnlimitedDijkstra (SPF)Link state
EIGRPComposite metricUnlimitedDUALHybrid
IS-ISCostUnlimitedDijkstraLink state
BGPPolicy / attributesUnlimitedPath vectorPath 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.