FC0-U71 Infrastructure Practice Question
A technician needs to install a wireless network in a large warehouse. The goal is to minimize interference and support many devices. Which frequency band is best for this scenario?
⚠ Common exam trap
FC0-U71 often tests the trade-off between range and interference; candidates may choose 2.4 GHz for its longer range, but the question emphasizes minimizing interference and supporting many devices, which points to 5 GHz.
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
✓
5 GHz
The 5 GHz frequency band is best for a large warehouse with many devices because it offers more non-overlapping channels, higher data rates, and less interference from common sources like microwaves and Bluetooth. While 5 GHz has shorter range than 2.4 GHz, in a warehouse, multiple access points can be deployed to provide coverage, and the reduced interference supports many devices simultaneously.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
5 GHz
Why this is correct
5 GHz offers far more non-overlapping channels and avoids congestion from microwaves, Bluetooth and legacy 2.4 GHz devices. In a warehouse with many clients, this wider spectrum minimises co-channel interference, satisfying the stem's interference and device-density constraints.
- ✗
60 GHz
Why it's wrong here
60 GHz suffers severe oxygen absorption and needs near-line-of-sight, so its short range cannot cover a large warehouse. It tempts because the band is uncongested and offers huge throughput, suiting dense short-range links within a single room.
- ✗
900 MHz
Why it's wrong here
900 MHz provides low throughput and limited channel capacity, so it cannot support many concurrent devices. It tempts because its long wavelength penetrates walls and travels far, suiting low-bandwidth telemetry across wide outdoor or industrial areas.
- ✗
2.4 GHz
Why it's wrong here
2.4 GHz shares spectrum with microwaves, Bluetooth and legacy devices, so interference cannot be minimised in a warehouse. It tempts because its longer range and broad device compatibility suit general-purpose coverage where interference is not the stated constraint.
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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 CompTIA exam blueprint
This FC0-U71 practice question is part of Courseiva's free CompTIA 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 FC0-U71 exam.