Drag and drop each OSPF packet type on the left to its matching function on the right.
Drag a concept onto its matching description — or click a concept then click the description.
Discovers and maintains OSPF neighbor adjacencies
Contains a summary of the link-state database for initial synchronization
Requests specific link-state advertisements from a neighbor
Carries one or more full LSAs during flooding or in response to an LSR
Acknowledges receipt of an LSU to ensure reliable flooding
Answer choices
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Correct answer & explanation
Hello: Discovers and maintains OSPF neighbor adjacencies
Hello packets discover and maintain neighbor relationships. DBD (Database Description) packets contain a summary of the LSDB for synchronization. LSR (Link-State Request) packets request specific LSAs. LSU (Link-State Update) packets carry full LSAs in response to LSRs or during flooding. LSAck (Link-State Acknowledgment) packets confirm receipt of LSUs.
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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Last reviewed: Jun 18, 2026
This 350-401 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 350-401 exam.
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