JNCIA-SEC Srx Series Service Gateways Practice Question
You are deploying a vSRX Virtual Firewall on a KVM hypervisor. Which virtual disk image type is typically used to boot the vSRX instance containing the Junos OS software?
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
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QCOW2 disk image file
The vSRX deployment package typically includes a qcow2 disk image format which serves as the virtual hard disk containing the Junos OS image.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
QCOW2 disk image file
Why this is correct
qcow2 is the standard disk image format utilized for KVM-based virtual machines such as the vSRX.
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VMDK snapshot container
Why it's wrong here
VMDK is specific to VMware ESXi platforms, whereas KVM utilizes qcow2.
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RAW kernel binary
Why it's wrong here
A raw kernel binary is not the distribution format for Junos OS on virtual platforms.
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ISO image file
Why it's wrong here
While ISOs are used for traditional OS installations, virtual appliances like vSRX are distributed as pre-built disk images.
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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.