- A
The 5 GHz network is using a channel not supported by the laptop's Wi-Fi adapter.
Why wrong: While possible, most adapters support common 5 GHz channels; this is less likely than range/obstruction issues.
- B
The laptop is too far from the access point, or there are obstructions blocking the 5 GHz signal.
5 GHz has poorer penetration and shorter range; distance or walls can prevent connection while 2.4 GHz still works.
- C
The laptop's Bluetooth is interfering with the 5 GHz Wi-Fi.
Why wrong: Bluetooth uses 2.4 GHz, not 5 GHz, so it cannot interfere with 5 GHz Wi-Fi.
- D
The 5 GHz network requires WPA3, which the laptop does not support.
Why wrong: WPA3 is backward compatible; the laptop would still see the network but fail authentication, not fail to connect entirely.
Laptop Can't Connect to 5GHz Wi-Fi: Range and Obstructions
This 220-1201 practice question tests your understanding of mobile device connection methods. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 technician is troubleshooting a laptop that cannot connect to a 5 GHz Wi-Fi network, but it connects to 2.4 GHz networks without issue. The laptop's Wi-Fi adapter supports both bands. What 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.
Quick Answer
The answer is that the laptop is too far from the access point, or physical obstructions are blocking the 5 GHz signal. This is correct because the 5 GHz band operates at a higher frequency than 2.4 GHz, which gives it faster data rates but significantly shorter range and poorer penetration through walls, furniture, or other barriers. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of wireless frequency trade-offs—specifically that 5 GHz sacrifices distance and obstacle penetration for speed, while 2.4 GHz offers broader coverage. A common trap is assuming a driver or channel mismatch first, but the exam emphasizes that physical layer issues are the most likely cause when a laptop connects to 2.4 GHz but not 5 GHz. Remember the memory tip: “5 GHz is fast but fragile—distance and walls are its kryptonite.”
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
The laptop is too far from the access point, or there are obstructions blocking the 5 GHz signal.
The most likely cause is distance or obstructions because 5 GHz signals have higher attenuation and shorter range compared to 2.4 GHz. Since the laptop connects to 2.4 GHz but not 5 GHz, and the adapter supports both bands, the physical environment is the primary suspect — 5 GHz is more easily blocked by walls, furniture, or simply being too far from the access point.
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 5 GHz network is using a channel not supported by the laptop's Wi-Fi adapter.
Why it's wrong here
While possible, most adapters support common 5 GHz channels; this is less likely than range/obstruction issues.
- ✓
The laptop is too far from the access point, or there are obstructions blocking the 5 GHz signal.
Why this is correct
5 GHz has poorer penetration and shorter range; distance or walls can prevent connection while 2.4 GHz still works.
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 laptop's Bluetooth is interfering with the 5 GHz Wi-Fi.
Why it's wrong here
Bluetooth uses 2.4 GHz, not 5 GHz, so it cannot interfere with 5 GHz Wi-Fi.
- ✗
The 5 GHz network requires WPA3, which the laptop does not support.
Why it's wrong here
WPA3 is backward compatible; the laptop would still see the network but fail authentication, not fail to connect entirely.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The 220-1201 exam often tests the misconception that 5 GHz connectivity issues are always due to hardware incompatibility or configuration, when in reality the most common cause is the physical limitation of 5 GHz signal propagation — distance and obstructions.
Detailed technical explanation
How to think about this question
5 GHz signals have higher frequency and thus shorter wavelength, leading to greater free-space path loss and reduced penetration through solid objects like walls and floors. The 2.4 GHz band can travel farther and penetrate obstacles more effectively, so a laptop that connects to 2.4 GHz but not 5 GHz is a classic symptom of range or obstruction issues. In enterprise environments, 5 GHz is often preferred for its higher throughput and less congestion, but careful site surveys are needed to ensure coverage.
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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Mobile Device Connection Methods — study guide chapter
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Mobile Device Connection Methods — This question tests Mobile Device Connection Methods — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The laptop is too far from the access point, or there are obstructions blocking the 5 GHz signal. — The most likely cause is distance or obstructions because 5 GHz signals have higher attenuation and shorter range compared to 2.4 GHz. Since the laptop connects to 2.4 GHz but not 5 GHz, and the adapter supports both bands, the physical environment is the primary suspect — 5 GHz is more easily blocked by walls, furniture, or simply being too far from the access point.
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.
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.
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Last reviewed: Jul 4, 2026
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