F5CAB1 Install, Initial Configuration, and Upgrade Practice Question
A network engineer is preparing a new BIG-IP appliance for installation in a data center. The rack has both 120V and 208V power available. The engineer wants to ensure the device powers on correctly and is not damaged. Which power consideration should the engineer follow?
⚠ Common exam trap
The trap here is assuming that all BIG-IP appliances use standard 120V power or that higher voltage is universally compatible, when in fact power specifications vary by model.
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
✓
Verify the appliance's power supply rating and connect it to the appropriate voltage source as specified in the platform's hardware guide.
The correct approach is to verify the appliance's power requirements in the hardware guide before connecting power. BIG-IP platforms have varying power specifications, and using the wrong voltage or cord can damage the device or cause it to fail. Proper site preparation includes confirming power and environmental requirements to ensure a successful installation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Connect the appliance only to a 120V outlet, because all BIG-IP appliances are designed exclusively for 120V.
Why it's wrong here
This is incorrect because many BIG-IP appliances support a range of voltages, including 208V. Assuming only 120V is supported could lead to underutilizing the device or failing to power it on in environments where 120V is unavailable. The engineer should verify the specific platform's power specifications rather than applying a blanket rule.
- ✓
Verify the appliance's power supply rating and connect it to the appropriate voltage source as specified in the platform's hardware guide.
Why this is correct
This is correct because BIG-IP hardware platforms have specific power requirements that vary by model. Checking the hardware guide ensures the correct voltage and power cord are used, preventing damage and ensuring reliable operation. This step is part of proper site preparation and is essential before powering on the device.
- ✗
Use a standard 120V computer power cord for all BIG-IP appliances, regardless of the model, because the power supplies auto-sense voltage.
Why it's wrong here
While some power supplies auto-sense voltage, not all BIG-IP appliances use auto-sensing supplies, and the power cord must match the outlet type and current rating. Using an incorrect cord can cause overheating or poor connections. The engineer must consult the hardware guide for the specific model's power cord requirements.
- ✗
Connect the appliance to a 208V outlet without checking the hardware guide, because higher voltage always improves performance.
Why it's wrong here
Higher voltage does not improve performance; it must match the appliance's input specifications. Connecting a device that only supports 120V to a 208V outlet can cause immediate damage. The engineer should never assume compatibility based on voltage alone and must verify the platform's supported input voltages.
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.