JNCIS-ENT OSPF Practice Question
You are troubleshooting an OSPF adjacency issue between two Juniper EX Series switches. One switch logs an error stating 'OSPF packet received with mismatched area ID'. Where in the Junos CLI should you check and correct this parameter?
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
✓
[edit protocols ospf area <area-id> interface <interface-name>]
OSPF area IDs are configured under the [edit protocols ospf area <area-id>] hierarchy level in Junos. Mismatched area IDs between connected interfaces prevent the Hello protocol from establishing neighbors.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
[edit protocols ospf area <area-id> interface <interface-name>]
Why this is correct
Correct. Area assignments are applied directly to interfaces or under the area hierarchy block.
- ✗
[edit system services ospf]
Why it's wrong here
Incorrect. This is not a valid Junos configuration path for OSPF.
- ✗
[edit protocols ospf area <area-id> stub]
Why it's wrong here
Incorrect. This configures the area as a stub, not the interface-level area membership.
- ✗
[edit routing-options router-id <ip-address>]
Why it's wrong here
Incorrect. Router ID is a unique identifier for the router itself, not tied to the area ID per interface.
Visual reference
About these practice questions
This JNCIS-ENT question is part of Courseiva's 519-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Juniper Networks exam blueprint
This JNCIS-ENT practice question is part of Courseiva's free Juniper Networks 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 JNCIS-ENT exam.