JNCIS-ENT OSPF Practice Question
What information is contained within an OSPF Type 1 (Router LSA)?
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
✓
The router's active interfaces, interface types, costs, and neighbor states within an area
Type 1 LSAs describe the state of the router's links (interfaces) that connect to a given area, including their costs and neighbor relationships.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Summary prefixes imported from external autonomous systems
Why it's wrong here
Incorrect. External prefixes are carried in Type 5 or Type 7 LSAs.
- ✓
The router's active interfaces, interface types, costs, and neighbor states within an area
Why this is correct
Correct. Type 1 LSAs describe local links and states for a router inside its area.
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Inter-area summary routes generated by ABRs
Why it's wrong here
Incorrect. Inter-area summaries are carried in Type 3 LSAs.
- ✗
Networks attached to a designated router on a broadcast segment
Why it's wrong here
Incorrect. This is the role of Type 2 Network LSAs.
Visual reference
About these practice questions
One of 506 original JNCIS-ENT 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 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.