JNCIA-SEC Srx Series Service Gateways Practice Question
Which command allows an administrator to view the factory-default configuration or rollback to a previous configuration version on an SRX device?
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
✓
rollback <number>
The 'rollback' command allows reverting the candidate configuration to a previously saved numbered configuration state.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
revert configuration history
Why it's wrong here
This is not valid Junos syntax.
- ✗
restore factory-defaults
Why it's wrong here
While 'set factory-defaults' exists, 'rollback' is used for numbered configuration history revisions.
- ✓
rollback <number>
Why this is correct
The 'rollback' command restores a previous configuration revision.
- ✗
undo last-change
Why it's wrong here
'undo' is used in other vendor operating systems, not Junos.
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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.