JNCIS-ENT BGP Practice Question
An administrator is troubleshooting a BGP peering session that is stuck in the Connect or Active state. Which THREE common causes could explain this issue? (Choose three)
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
✓
TCP port 179 is blocked by a firewall filter.
A session stuck in Active/Connect means the TCP session cannot be established. Causes include incorrect peer IP/AS, firewall blocking port 179, or missing multihop/TTL settings.
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 reflection client parameters are misconfigured.
Why it's wrong here
Route reflection issues affect route propagation, not basic TCP session establishment.
- ✓
TCP port 179 is blocked by a firewall filter.
Why this is correct
Firewalls blocking port 179 prevent TCP connection establishment.
- ✓
Incorrect neighbor IP address configured under protocols bgp.
Why this is correct
An incorrect neighbor IP prevents the TCP SYN from reaching the correct destination.
- ✗
Incorrect peer AS number configured in the OPEN message parameters.
Why it's wrong here
Incorrect AS usually leads to OpenSent or Idle state with error notifications, though it can stall startup.
- ✓
Missing multihop configuration for a non-directly connected eBGP peer.
Why this is correct
Without multihop, eBGP packets with TTL 1 are dropped, stalling the TCP/BGP handshake.
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 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.