mediumMultiple Choice
Solving 5 GHz Wi-Fi Dropout Through Thick Walls
A user complains that their laptop frequently disconnects from the Wi-Fi when they move to the conference room, which is 50 feet from the access point through two walls. The network uses 5 GHz. What is the MOST likely cause of the disconnects?
⚠ Common exam trap
A common mistake is to assume that 5 GHz is always superior because it is faster, without recognizing its trade-off in range and penetration through physical obstacles.
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 signals have poor penetration through walls.
The 5 GHz band offers higher data rates and less interference than 2.4 GHz, but it has significantly poorer wall penetration due to its shorter wavelength. At 50 feet through two walls, the signal attenuation is severe enough to cause frequent disconnects, especially if the walls contain dense materials like concrete or metal studs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The access point is overloaded with too many clients.
Why it's wrong here
Client count does not explain disconnects tied specifically to distance and two walls; overload would affect throughput for all nearby clients, not one roaming user. Capacity planning addresses dense auditoriums or classrooms, where many clients associate to a single access point simultaneously.
- ✗
The laptop's power management settings are turning off the Wi-Fi adapter.
Why it's wrong here
Power management would cause idle-time disconnects anywhere, not a pattern tied to the conference room's distance and walls. This setting is the answer when a laptop drops Wi-Fi while stationary and idle on battery, not when range and obstructions are the stated variables.
- ✓
5 GHz signals have poor penetration through walls.
Why this is correct
5 GHz radio waves attenuate more sharply than 2.4 GHz when passing through dense materials, so two walls at 50 feet weaken the signal below the threshold needed to maintain association, causing the roaming disconnects the user reports.
- ✗
The conference room has a metal door that blocks the signal.
Why it's wrong here
A metal door is a localised obstruction, but the stem already attributes the drop to 50 feet through two walls, which attenuates 5 GHz severely regardless of the door. Metal shielding would be the answer if the signal failed only when that specific door was closed.
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Same concept, more angles
1 more way this is tested on 220-1201
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A customer reports that their laptop frequently disconnects from the Wi-Fi in their home office, but works fine in other rooms. The office is located in a detached garage, and the wireless router is in the main house. Which wireless networking technology would best solve this issue without running cables?
medium- A.5 GHz frequency band
- ✓ B.Wireless mesh network
- C.Powerline networking adapters
- D.802.11ac standard
Why B: A wireless mesh network is the best solution because it extends Wi-Fi coverage to the detached garage without running cables. Mesh nodes communicate wirelessly with each other, creating a seamless network that overcomes the range and obstruction issues caused by the distance and building materials between the main house and garage.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1201 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 220-1201 exam.