JNCIS-ENT High Availability Practice Question
An administrator is configuring Graceful Restart on a pair of Juniper MX series routers running OSPF. What is the primary purpose of Graceful Restart in this scenario?
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
✓
To ensure uninterrupted data packet forwarding while the control plane routing protocol restarts.
Graceful Restart allows a routing platform to continue forwarding packets along known routes while its control plane is restarting, avoiding routing churn.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
To instantly drop all adjacencies and force an immediate full SPF recalculation across the network.
Why it's wrong here
Dropping adjacencies defeats the purpose of Graceful Restart, which aims to suppress routing changes.
- ✓
To ensure uninterrupted data packet forwarding while the control plane routing protocol restarts.
Why this is correct
Graceful Restart keeps forwarding tables populated using helper mode on neighbors while the control engine recovers.
- ✗
To automatically upgrade Junos OS images without rebooting the forwarding plane.
Why it's wrong here
In-Service Software Upgrade (ISSU) is responsible for software upgrades without control plane downtime, not Graceful Restart alone.
- ✗
To synchronize firewall filter counters between primary and backup Routing Engines.
Why it's wrong here
Firewall filter counter sync is handled by GRES and daemon state synchronization, not OSPF Graceful Restart.
Visual reference
About these practice questions
Courseiva writes every JNCIS-ENT question from scratch — 506 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.