F5CAB4 Control Plane Administration Practice Question
A BIG-IP administrator is preparing to upgrade the TMOS software on a device. Before the upgrade, the administrator must ensure that the current configuration is backed up and that the device can be restored if the upgrade fails. Which tmsh command creates a full configuration backup archive that can be used for restoration?
⚠ Common exam trap
The trap here is assuming that saving the running configuration to disk is equivalent to creating a restorable UCS backup archive.
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
✓
save sys ucs /var/local/ucs/backup.ucs
A UCS archive is the standard full backup format on BIG-IP, containing configuration, licenses, and certificates. The save sys ucs command creates this archive and can be directed to a specific path. Other commands either save only the running configuration to standard files or are not valid tmsh commands for creating backups.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
create sys backup /var/local/ucs/backup.ucs
Why it's wrong here
create sys backup is not a valid tmsh command. The BIG-IP system does not provide a sys backup object for creating archives. The administrator would receive a syntax error and would not generate the required backup file for restoration.
- ✗
export sys config /var/local/ucs/backup.ucs
Why it's wrong here
export is not a valid tmsh verb for creating configuration backups. While export is used in some F5 contexts, it is not the correct command for generating a UCS archive. This command would fail and would not produce a restorable backup for the upgrade.
- ✓
save sys ucs /var/local/ucs/backup.ucs
Why this is correct
The tmsh command save sys ucs creates a UCS archive containing the full configuration, including license, certificates, and settings. Saving it to /var/local/ucs/ provides a restorable backup that can be loaded if the upgrade fails, satisfying the administrator's requirement for a full configuration backup.
- ✗
save sys config /var/local/ucs/backup.ucs
Why it's wrong here
save sys config writes the running configuration to the standard configuration files on disk, but it does not create a UCS archive. It also does not accept an arbitrary file path as an argument. This command would not produce a restorable backup archive for the upgrade scenario.
About these practice questions
Courseiva writes every F5CAB4 question from scratch — 40 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 September 2026 · checked against the official F5 exam blueprint
This F5CAB4 practice question is part of Courseiva's free F5 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 F5CAB4 exam.