F5CAB1 Install, Initial Configuration, and Upgrade Practice Question
An administrator accidentally deleted a configuration file. Which action would be the most efficient way to restore the system configuration to its previous state?
⚠ Common exam trap
Candidates often select manual configuration rebuilding or attempting to restore individual files via SCP. They overlook that a UCS archive is the comprehensive, atomic unit designed specifically for full system state restoration.
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
✓
Restore from a UCS file.
Restoring a previously created UCS (User Configuration Set) archive is the fastest and most reliable way to recover from an accidental configuration loss. The UCS file contains all the necessary data to rebuild the system configuration. This standard recovery procedure minimizes downtime and human error, providing a clean and predictable path back to the last known working state of the BIG-IP device.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Perform a factory reset.
Why it's wrong here
A factory reset wipes the entire configuration, which is the opposite of the goal. Restoring the accidental deletion requires specific file recovery, not a wholesale deletion of all settings. A factory reset would create more work, as the administrator would then need to manually rebuild the entire configuration.
- ✓
Restore from a UCS file.
Why this is correct
Restoring from a UCS file is the standard, supported method for reverting to a prior configuration. It restores all objects, including virtual servers, pools, and iRules, back to the point at which the archive was created. This process is efficient and ensures that the system state is fully recovered.
- ✗
Re-install the TMOS software.
Why it's wrong here
Re-installing TMOS software is an unnecessary and time-consuming procedure for a configuration file error. The OS files are likely intact; the problem is with the user-defined configuration. Re-installing the software does not restore deleted configuration files, and may even reset the system to defaults, complicating the recovery.
- ✗
Use the 'tmsh load config' command.
Why it's wrong here
The 'tmsh load config' command only loads the existing configuration files stored in the configuration directory. If the file was deleted, this command will fail or load an incomplete configuration. Restoring the system requires importing a backup, not just attempting to load files that no longer exist on disk.
About these practice questions
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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 F5CAB1 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 F5CAB1 exam.