JNCIS-ENT BGP Practice Question
An enterprise customer connects to two different service providers via eBGP. They want to preferentially use Service Provider A, but fail over to Service Provider B if Provider A fails. How can they influence the inbound traffic from the providers?
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
✓
Use AS-PATH prepending in an outbound policy toward Provider B
Inbound traffic (traffic entering the AS from providers) is influenced by advertising path attributes to the providers, primarily AS-PATH prepending.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Use AS-PATH prepending in an outbound policy toward Provider B
Why this is correct
Prepending the local ASN multiple times to Provider B makes its path look longer, causing providers to prefer Provider A.
- ✗
Modify Local Preference in an inbound policy
Why it's wrong here
Local preference only affects outbound traffic choice or internal path selection, as eBGP peers ignore local pref.
- ✗
Change the MED value in an inbound policy
Why it's wrong here
MED is sent to external peers, but inbound traffic choice is controlled by what you send out.
- ✗
Configure a lower router ID
Why it's wrong here
Router ID does not influence remote provider path selection.
About these practice questions
This JNCIS-ENT question is part of Courseiva's 506-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam 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.