JNCIA-SEC Srx Series Service Gateways Practice Question
An administrator is configuring a chassis cluster on two SRX Series devices. Which THREE requirements must be met to ensure proper cluster formation and stability? (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
✓
Both devices must be the exact same SRX hardware model and run the same Junos OS version.
Chassis clustering requires identical hardware models/software versions, dedicated control/fabric connections, and proper node IDs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Cluster control ports must connect to an external public internet switch.
Why it's wrong here
Cluster control and fabric links are direct device-to-device connections, not public internet links.
- ✓
Both devices must be the exact same SRX hardware model and run the same Junos OS version.
Why this is correct
Clusters require model and software version parity between nodes.
- ✓
Node IDs (Node 0 and Node 1) must be correctly assigned.
Why this is correct
Cluster nodes must be explicitly assigned Node 0 and Node 1 roles.
- ✓
Dedicated control (fab0/fab1) and control links must be connected between the nodes.
Why this is correct
Fabric and control links are mandatory for state synchronization and HA communication.
- ✗
Both devices must have different Junos OS major versions to prevent split-brain.
Why it's wrong here
Software versions must match, not differ.
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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.