JNCIS-ENT OSPF Practice Question
An engineer needs to prevent Type 4 and Type 5 LSAs from entering a specific OSPF area while still allowing external routes to be summarized via default routing. Which area type should be configured?
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
✓
Totally Stubby Area
A Totally Stubby Area blocks Type 3, Type 4, and Type 5 LSAs, and automatically injects a default route (Type 3) into the area to reach destinations outside the area.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Standard OSPF Area
Why it's wrong here
Incorrect. A standard area floods all LSA types including Type 4 and 5.
- ✗
Not-So-Stubby Area (NSSA)
Why it's wrong here
Incorrect. An NSSA allows external routes via Type 7 LSAs to be redistributed within it, rather than blocking all external routing information.
- ✓
Totally Stubby Area
Why this is correct
Correct. A totally stubby area blocks Type 3, 4, and 5 LSAs and uses a default route for external destinations.
- ✗
Standard Stub Area
Why it's wrong here
Incorrect. A standard stub area blocks Type 4 and 5 LSAs but still permits inter-area Type 3 summary 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.