JNCIS-ENT OSPF Practice Question
When examining an OSPF link-state database on a Junos device, which THREE LSA types are flooded exclusively within the local area and do not cross Area Border Routers (ABRs) into other areas? (Choose three.)
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
✓
Type 2 Network LSA
Type 1 (Router LSAs) and Type 2 (Network LSAs) describe the topology within a single area and do not cross ABRs. Type 7 (NSSA external LSAs) are also constrained within an NSSA area until translated by the ABR.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Type 2 Network LSA
Why this is correct
Type 2 LSAs describe multi-access networks and stay within the local area.
- ✓
Type 7 NSSA LSA
Why this is correct
Type 7 LSAs are confined to the NSSA area until translated to Type 5 by the ABR.
- ✗
Type 4 Summary LSA
Why it's wrong here
Type 4 LSAs are injected into other areas by ABRs to reach ASBRs.
- ✓
Type 1 Router LSA
Why this is correct
Type 1 LSAs describe router interfaces and are contained within the originating area.
- ✗
Type 3 Summary LSA
Why it's wrong here
Type 3 LSAs are generated by ABRs specifically to cross area boundaries.
Visual reference
About these practice questions
Courseiva writes every JNCIS-ENT question from scratch — 506 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 →
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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.