F5CAB1 Install, Initial Configuration, and Upgrade Practice Question
Which utility should an administrator use to verify the integrity of the BIG-IP configuration before performing an upgrade?
⚠ Common exam trap
Candidates often confuse 'load sys config' (which applies changes) with 'load sys config verify' (which only checks). Applying a broken configuration can cause a system to fail to boot.
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
✓
tmsh load sys config verify
The 'tmsh load sys config verify' command is a critical diagnostic tool. It simulates the loading of the configuration, identifying syntax errors or incompatibilities that could prevent the device from booting correctly after an upgrade. Running this check beforehand allows the administrator to remediate issues in a controlled environment, preventing the nightmare scenario of a non-bootable production system following a major software version update.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
tmsh load sys config verify
Why this is correct
This command performs a dry-run check of the configuration file. It checks for syntax errors, missing objects, and deprecated parameters that might cause the load process to fail. Using it before an upgrade is a best practice to ensure the configuration is compatible with the new software.
- ✗
tcpdump -i 0.0
Why it's wrong here
Tcpdump is a network packet capture tool used for troubleshooting traffic flows. It provides zero insight into the integrity of the configuration files or the compatibility of the system settings with a new software version. It is entirely unrelated to the pre-upgrade configuration validation process.
- ✗
show sys software status
Why it's wrong here
This command shows the current installed versions and their boot status. It does not analyze the configuration file for errors or check for compatibility issues between the old version and the new version. It is useful for status reporting, not for configuration validation.
- ✗
config check-all
Why it's wrong here
This command does not exist in the F5 BIG-IP shell. Administrators must use the proper TMSH commands to interact with the system configuration. Inventing commands is not only ineffective but potentially dangerous if it leads to executing unrecognized or unintended scripts on the production system.
About these practice questions
One of 80 original F5CAB1 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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 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.