Drag and drop each OSPF LSA type on the left to its matching description on the right.
Drag a concept onto its matching description — or click a concept then click the description.
Describes the router's own directly connected links and neighbors
Generated by the Designated Router to describe all routers attached to a multi-access segment
Advertises networks from one area into another area (inter-area routes)
Advertises the location of an Autonomous System Boundary Router (ASBR)
Advertises routes redistributed from another routing domain (external routes)
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Type 1: Describes the router's own directly connected links and neighbors
LSA Type 1 (Router LSA) describes a router's own links; Type 2 (Network LSA) is generated by the DR; Type 3 (Summary LSA) advertises inter-area routes; Type 4 (ASBR Summary LSA) advertises the location of an ASBR; Type 5 (AS External LSA) advertises external routes.
Visual reference
Quick reference
| 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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