easyMultiple ChoiceObjective-mapped
300-410 Practice Question: Which OSPF packet type is used to send link-state…
Which OSPF packet type is used to send link-state advertisements (LSAs) and is acknowledged by the receiver?
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
✓
Link State Update (type 4)
OSPF packet type 4 is the Link State Update packet, used to flood LSAs. It is acknowledged by the receiver via a Link State Acknowledgment packet (type 5).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Hello (type 1)
Why it's wrong here
Incorrect. Hello packets are used for neighbor discovery and keepalive, not for sending LSAs.
- ✗
Database Description (type 2)
Why it's wrong here
Incorrect. Database Description packets summarize the link-state database during adjacency formation.
- ✗
Link State Request (type 3)
Why it's wrong here
Incorrect. Link State Request packets request specific LSAs from a neighbor.
- ✓
Link State Update (type 4)
Why this is correct
Correct. Link State Update packets carry LSAs and are acknowledged by the receiver.
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.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 300-410 question from scratch — 1,966 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.