JNCIS-ENT OSPF Practice Question
An enterprise network has redundant ABRs connecting Area 1 to Area 0. To prevent suboptimal routing and unnecessary Type 3 LSA flooding, an administrator decides to filter inter-area summary routes on the ABR using a Junos policy. Which configuration component is required to apply an export policy to OSPF summary routes on an ABR?
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
✓
set protocols ospf area 0.0.0.1 prefix-export <policy-name>
Inter-area summarization and export filtering on Junos ABRs are configured using the 'area <name> prefix-export' or range policies under the OSPF hierarchy.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
set protocols ospf import <policy-name>
Why it's wrong here
Incorrect. OSPF does not use import policies for link-state databases due to loop-prevention requirements of link-state protocols.
- ✗
set routing-options export <policy-name>
Why it's wrong here
Incorrect. Global routing options export applies to routing table advertisement, not OSPF ABR internal summary generation.
- ✓
set protocols ospf area 0.0.0.1 prefix-export <policy-name>
Why this is correct
Correct. Prefix-export policies control which summarized prefixes are advertised out of or into an area.
- ✗
set protocols ospf export <policy-name>
Why it's wrong here
Incorrect. General protocol export policies in OSPF apply to redistributed external routes (Type 5), not inter-area summary routes.
Visual reference
About these practice questions
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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.