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220-1201 Practice Question: A customer complains that their Wi-Fi signal is…
A customer complains that their Wi-Fi signal is weak in a specific conference room. You need to measure the signal strength and identify potential interference sources. Which tool is best suited for this task?
⚠ Common exam trap
The CompTIA A+ exam often tests the distinction between a spectrum analyzer and a Wi-Fi analyzer, trapping candidates who think a spectrum analyzer is the best choice for basic signal strength measurement, when in fact a Wi-Fi analyzer is the correct field tool for this specific task.
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
✓
Wi-Fi analyzer
A Wi-Fi analyzer (Option B) is specifically designed to measure wireless signal strength (RSSI) and identify interference sources such as overlapping channels, co-channel interference, or non-Wi-Fi devices (e.g., Bluetooth, microwave ovens) by displaying real-time spectrum usage and channel utilization. This tool provides the granularity needed to diagnose weak signal in a specific area, unlike generic tools that lack wireless analysis capabilities.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Spectrum analyzer
Why it's wrong here
A spectrum analyser visualises raw radio frequency activity across a broad frequency range, making it excellent for identifying non-Wi-Fi interference sources like microwaves or cordless phones by their unique RF signatures. However, it does not directly measure the Wi-Fi signal strength (RSSI) of a specific Wi-Fi network or provide Wi-Fi-specific metrics such as channel utilisation or signal-to-noise ratio. For measuring actual Wi-Fi signal strength and diagnosing Wi-Fi-specific performance issues, a dedicated Wi-Fi analyser is required.
- ✓
Wi-Fi analyzer
Why this is correct
A Wi-Fi analyzer provides signal strength readings, channel overlap information, and can help identify sources of interference like other access points or devices.
- ✗
Cable tester
Why it's wrong here
A cable tester is for wired Ethernet connections and cannot measure wireless signal strength.
- ✗
Multimeter
Why it's wrong here
A multimeter measures electrical properties and is not used for wireless signal analysis.
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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.