The answer is a microwave oven operating near the access point. This is correct because microwave ovens emit electromagnetic radiation at approximately 2.45 GHz, which falls squarely within the 2.4 GHz Wi-Fi band, causing significant interference that leads to intermittent connectivity drops on wireless devices while wired Ethernet connections remain unaffected. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of RF interference sources and the limitations of the 2.4 GHz band, often appearing in troubleshooting questions where only wireless clients experience issues. A common trap is to blame the router or channel congestion first, but the key clue is the intermittent nature tied to appliance usage. Remember the memory tip: “Microwave matches the MHz”—if a microwave is running, your 2.4 GHz Wi-Fi is likely taking a hit.
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 experiences intermittent Wi-Fi drops on laptops but not on desktops connected via Ethernet. The wireless network uses 2.4 GHz. Which of the following is the MOST likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A microwave oven is operating near the access point.
The 2.4 GHz band is prone to interference from common household devices like microwaves and cordless phones, which can cause intermittent connectivity issues. This scenario highlights the importance of understanding frequency band characteristics in wireless networking.
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.
✗
The access point is overheating.
Why it's wrong here
Overheating would likely affect all devices, not just wireless laptops, and is less common than interference.
✓
A microwave oven is operating near the access point.
Why this is correct
Microwave ovens operate at 2.4 GHz and can cause significant interference, leading to intermittent drops on Wi-Fi but not on wired connections.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The laptops have outdated Bluetooth drivers.
Why it's wrong here
Bluetooth also uses 2.4 GHz but driver issues would not cause intermittent drops across multiple laptops consistently.
✗
The Ethernet switch is failing.
Why it's wrong here
A failing switch would affect all devices, including desktops, and is unrelated to wireless-only issues.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: A microwave oven is operating near the access point. — The 2.4 GHz band is prone to interference from common household devices like microwaves and cordless phones, which can cause intermittent connectivity issues. This scenario highlights the importance of understanding frequency band characteristics in wireless networking.
What should I do if I get this 220-1201 question wrong?
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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 wireless printer stops responding when the microwave is in use. The printer is connected via Wi-Fi to a dual-band router. Which troubleshooting step should the technician take first to resolve this issue?
easy
A.Replace the printer with a wired model
B.Change the router’s 2.4 GHz channel
✓ C.Connect the printer to the 5 GHz network
D.Update the printer firmware
Why C: Microwaves emit strong interference on the 2.4 GHz band. Moving the printer to the 5 GHz band avoids that interference. Changing the channel on 2.4 GHz may help but is less effective. Replacing the router or printer is unnecessary.
Variation 2. 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?
easy
A.Enable WPA3 encryption on the router.
✓ B.Upgrade to a dual-band router and connect clients to the 5 GHz SSID.
C.Increase the router's transmit power to maximum.
D.Change the 2.4 GHz channel from 6 to 11.
Why B: The 2.4 GHz band is shared by many devices, including microwaves, which cause interference. Switching to the 5 GHz band avoids this because microwaves operate at 2.4 GHz. This is a common real-world troubleshooting step for wireless connectivity issues.
Last reviewed: Jun 18, 2026
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.