mediumMultiple SelectObjective-mapped
350-401 Practice Question: Which two statements about OSPF network types are…
Which two statements about OSPF network types are true? (Choose two.)
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
✓
On a broadcast multiaccess network, OSPF elects a DR and BDR to reduce LSA flooding.
OSPF network types control how adjacencies are formed and how LSAs are flooded. Broadcast and non-broadcast types require a DR/BDR election, while point-to-point and point-to-multipoint do not. The loopback interface defaults to loopback network type, not point-to-point.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
On a broadcast multiaccess network, OSPF elects a DR and BDR to reduce LSA flooding.
Why this is correct
Correct because on broadcast networks (e.g., Ethernet), a Designated Router (DR) and Backup DR are elected to minimize the number of adjacencies and flooding.
- ✗
The OSPF point-to-point network type requires a DR/BDR election.
Why it's wrong here
Incorrect because point-to-point networks do not use DR/BDR; they form a single adjacency between the two routers.
- ✓
On a non-broadcast multiaccess (NBMA) network, OSPF can use the neighbor command to manually discover neighbors.
Why this is correct
Correct because NBMA networks (e.g., Frame Relay) require manual neighbor configuration since they lack broadcast capability.
- ✗
The OSPF point-to-multipoint network type always elects a DR.
Why it's wrong here
Incorrect because point-to-multipoint networks treat each link as a point-to-point link and do not use DR/BDR.
- ✗
The default OSPF network type for a loopback interface is point-to-point.
Why it's wrong here
Incorrect because the default network type for a loopback interface is 'loopback', which is a special type that always advertises the interface as a /32 host route.
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
One of 1,175 original 350-401 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.