FC0-U71 Infrastructure Practice Question
A user reports that their laptop's Wi-Fi connection is slow and frequently drops when they are in the living room, but works fine in the office near the router. The router supports both 2.4GHz and 5GHz bands. Which band should the user connect to for better performance in the living room?
⚠ Common exam trap
FC0-U71 often tests the misconception that 'faster band = better band' — candidates pick 5GHz for performance without considering that range and obstacle penetration favor 2.4GHz at distance.
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
✓
2.4GHz
The 2.4GHz band has longer wavelength and better wall penetration, so it maintains a usable signal at greater distances and through obstacles like walls between the office and living room. Although 5GHz offers higher throughput at close range, its shorter wavelength causes faster attenuation through walls, explaining the drops in the living room. For range and obstacle penetration, 2.4GHz is the correct choice.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Cellular
Why it's wrong here
Cellular is a separate WAN radio technology requiring a modem and subscription, not a Wi-Fi band selection, so it cannot be chosen from the router's 2.4GHz/5GHz options. It is tempting as a fallback when Wi-Fi coverage fails, and would be correct if no usable Wi-Fi signal reached the living room.
- ✗
5GHz
Why it's wrong here
5GHz has shorter wavelength and poorer wall penetration, so signal degrades over the distance to the living room, worsening drops. It is tempting because 5GHz offers higher throughput and less interference, and would be correct for a device near the router with a clear line of sight.
- ✓
2.4GHz
Why this is correct
2.4GHz signals penetrate walls and travel further than 5GHz, which attenuates quickly with distance and obstacles. At living-room range from the router, the 2.4GHz band delivers a more stable, usable connection despite lower peak throughput.
- ✗
Bluetooth
Why it's wrong here
Bluetooth is a short-range personal area network radio for peripherals, not a Wi-Fi frequency band, so it cannot carry the laptop's network traffic. It is tempting because it also operates in 2.4GHz and is often conflated with wireless networking, but it would only suit pairing devices such as headsets.
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 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.