JNCIA-SEC Srx Series Service Gateways Practice Question
An administrator configures a high availability (HA) cluster on two SRX550 devices. During failover testing, they observe that stateful sessions are abruptly dropped. Which feature must be properly synchronized between the primary and secondary nodes to prevent session drop during failover?
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
✓
Session synchronization
Session synchronization (session-sync) ensures that active stateful firewall sessions are replicated to the backup node so traffic can resume seamlessly upon failover.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Session synchronization
Why this is correct
Session synchronization ensures active stateful flows are mirrored to the backup node, enabling hitless failover.
- ✗
NAT pool reservation sync
Why it's wrong here
NAT pool sync alone does not maintain active TCP/UDP session states.
- ✗
IDP signature database sync
Why it's wrong here
IDP signatures are static definitions and do not maintain active transit session states during failover.
- ✗
Routing table synchronization
Why it's wrong here
While routing is important, session-sync specifically maintains active firewall state tables across nodes.
Visual reference
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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 JNCIA-SEC 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 JNCIA-SEC exam.