JNCIS-ENT BGP Practice Question
A Junos router receives four identical routes via BGP. Reviewing the routing table, path selection picked route 3. Route 1 has a lower MED, Route 2 has a higher Local Preference, Route 4 is from an eBGP peer while Route 3 is iBGP. Assuming standard default path selection, why was Route 3 chosen over Route 4?
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
✓
Junos prefers iBGP paths over eBGP paths during the tie-breaking steps.
In Junos BGP path selection, after comparing local preference, AS path length, origin type, and MED, Junos prefers internal (iBGP) paths over external (eBGP) paths, provided all other tie-breakers are equal.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Route 3 had a lower router ID than Route 4.
Why it's wrong here
Router ID is evaluated later in the algorithm.
- ✗
Route 3 had a lower MED value.
Why it's wrong here
MED is evaluated earlier, but the scenario implies equal or overridden attributes.
- ✓
Junos prefers iBGP paths over eBGP paths during the tie-breaking steps.
Why this is correct
Junos path selection prefers internal paths over external paths if all prior metrics are identical.
- ✗
Route 3 was received from a peer with a lower peer IP address.
Why it's wrong here
Peer IP is not part of the standard BGP path selection algorithm.
About these practice questions
Courseiva writes every JNCIS-ENT question from scratch — 519 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 →
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.