JNCIP-ENT BGP Advanced Practice Question
An operator configures BGP attribute value manipulation using a Junos routing policy. Specifically, the policy uses 'as-path-action prepend' combined with community matching. When is this outbound policy evaluated relative to BGP route selection?
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
✓
When advertising routes to a BGP peer, after the best path has been chosen.
Outbound export policies are evaluated when advertising routes to peers, after the best path has been selected locally.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
During the initial import processing from EBGP peers before next-hop resolution.
Why it's wrong here
This describes import policy processing, not outbound export prepending.
- ✓
When advertising routes to a BGP peer, after the best path has been chosen.
Why this is correct
Export policies apply to outgoing updates after the local router has determined its best path.
- ✗
Before the best path is selected, affecting the local routing table calculation.
Why it's wrong here
Export policies do not affect the local router's best path selection or routing table.
- ✗
During the route selection algorithm right after MED comparison.
Why it's wrong here
Selection algorithm runs independently of export policies.
About these practice questions
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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 JNCIP-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 JNCIP-ENT exam.