- A
Enable WPA3 encryption on the router.
Why wrong: Encryption improves security, not interference from external devices like microwaves.
- B
Upgrade to a dual-band router and connect clients to the 5 GHz SSID.
5 GHz is less congested and not affected by microwave interference, directly solving the problem.
- C
Increase the router's transmit power to maximum.
Why wrong: Higher power can sometimes help range but does not mitigate co-channel interference from microwaves.
- D
Change the 2.4 GHz channel from 6 to 11.
Why wrong: Channel changes within 2.4 GHz may help with other Wi-Fi networks but not with non-Wi-Fi interference like microwaves, which affect the entire band.
Question 360 of 1,020
220-1201 Wireless Networking Technologies Practice Question
This 220-1201 practice question tests your understanding of wireless networking technologies. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A small office uses a legacy 2.4 GHz wireless b/g router. Employees report frequent disconnects and slow speeds, especially when the microwave is used in the break room. Which change would most directly reduce interference in this scenario?
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
✓
Upgrade to a dual-band router and connect clients to the 5 GHz SSID.
The legacy 2.4 GHz router operates in the same frequency band as microwave ovens, which emit broadband interference around 2.45 GHz. Upgrading to a dual-band router and moving clients to the 5 GHz SSID directly avoids this interference because 5 GHz is not affected by microwave emissions, providing a cleaner RF environment and more available channels.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable WPA3 encryption on the router.
Why it's wrong here
Encryption improves security, not interference from external devices like microwaves.
- ✓
Upgrade to a dual-band router and connect clients to the 5 GHz SSID.
Why this is correct
5 GHz is less congested and not affected by microwave interference, directly solving the problem.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Increase the router's transmit power to maximum.
Why it's wrong here
Higher power can sometimes help range but does not mitigate co-channel interference from microwaves.
- ✗
Change the 2.4 GHz channel from 6 to 11.
Why it's wrong here
Channel changes within 2.4 GHz may help with other Wi-Fi networks but not with non-Wi-Fi interference like microwaves, which affect the entire band.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA A+ exams often test the misconception that changing channels or increasing power can solve interference from non-Wi-Fi sources, when in fact the only effective solution is to move to a different frequency band (5 GHz) that is not affected by the interferer.
Detailed technical explanation
How to think about this question
Microwave ovens typically emit unmodulated RF noise in the 2.4–2.5 GHz range, which overlaps all 2.4 GHz Wi-Fi channels (1–11 in the US). The 5 GHz band (5.15–5.85 GHz) is far removed from this noise source and also offers more non-overlapping channels (e.g., 24 in the US with DFS), reducing congestion. In real-world deployments, even a dual-band router may still see interference on 2.4 GHz, but moving critical clients to 5 GHz eliminates the problem entirely.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1201 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Wireless Networking Technologies — This question tests Wireless Networking Technologies — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Upgrade to a dual-band router and connect clients to the 5 GHz SSID. — The legacy 2.4 GHz router operates in the same frequency band as microwave ovens, which emit broadband interference around 2.45 GHz. Upgrading to a dual-band router and moving clients to the 5 GHz SSID directly avoids this interference because 5 GHz is not affected by microwave emissions, providing a cleaner RF environment and more available channels.
What should I do if I get this 220-1201 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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