mediumMultiple Choice
350-401 Practice Question: Examine the following configuration snippet:…
Examine the following configuration snippet:
interface GigabitEthernet0/1 ip address 192.168.1.1 255.255.255.0 ip ospf network point-to-point ip ospf hello-interval 10 ip ospf dead-interval 40
!
router ospf 1 network 192.168.1.0 0.0.0.255 area 0
What is the effect of this configuration?
⚠ Common exam trap
Cisco often tests the misconception that the network command is ignored when an explicit ip ospf network type is configured, but in reality both work together—the network command enables OSPF on the interface, and the ip ospf network command only changes the OSPF network type.
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
✓
OSPF adjacency will form with a neighbor using hello/dead intervals of 10/40 seconds.
The configuration sets the OSPF network type to point-to-point on the interface, which allows OSPF to form an adjacency with a neighbor using the configured hello interval of 10 seconds and dead interval of 40 seconds. These intervals are valid for point-to-point networks, and the network command under router ospf correctly enables OSPF on the interface. Therefore, an adjacency will form as long as the neighbor's intervals match.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
OSPF adjacency will form with a neighbor using hello/dead intervals of 10/40 seconds.
Why this is correct
This is correct because the interface has been explicitly configured as point-to-point, which uses a default hello interval of 10 seconds and a dead interval of 40 seconds on Cisco IOS. These timers match the neighbor's timers, so the two routers will form a full adjacency. Additionally, the point-to-point network type suppresses DR/BDR election, making adjacency establishment straightforward and deterministic.
- ✗
OSPF adjacency will not form because the hello interval is too low for point-to-point.
Why it's wrong here
This is incorrect because 10 seconds is the standard, expected hello interval for OSPF point-to-point networks, not 'too low.' A hello interval is only problematic when it fails to match the neighbor's configured interval, causing the dead timer to expire prematurely. Since the neighbor also uses 10/40, the timers are compatible and adjacency forms normally.
- ✗
The network command under router ospf will be ignored because the interface has an explicit network type.
Why it's wrong here
The network command under router ospf is still fully processed; it is responsible for assigning the interface to an OSPF area, not for determining the network type. The explicit interface-level point-to-point configuration only overrides the OSPF network type and its associated parameters like timers or DR/BDR behavior. Area assignment remains valid, so the interface participates in OSPF exactly as intended.
- ✗
OSPF will use the default broadcast network type because the point-to-point keyword is misspelled.
Why it's wrong here
The keyword 'point-to-point' is correctly spelled in the interface configuration, so the network type is not misinterpreted. Even if a typo existed, IOS would reject the invalid command rather than silently falling back to the default broadcast network type, which would cause a configuration error. Therefore, the adjacency forms with point-to-point characteristics, not broadcast.
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.
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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.