N10-009 Network Troubleshooting Practice Question
A user's laptop frequently disconnects from the Wi-Fi network when they move to the conference room. Other devices in the conference room maintain stable connections. The laptop shows a strong signal in the conference room. What is the most likely cause?
⚠ Common exam trap
CompTIA often tests the trap that a strong signal guarantees a stable connection, but in reality, client-side driver issues or misconfigured power-save settings can cause disconnects despite excellent RSSI.
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
✓
Laptop's wireless adapter driver is outdated or faulty
The laptop disconnects only when moving to the conference room, while other devices remain stable, ruling out environmental issues. A strong signal but frequent disconnects points to a client-side problem, most commonly an outdated or faulty wireless adapter driver that fails to handle roaming or power-save transitions properly.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Laptop's wireless adapter driver is outdated or faulty
Why this is correct
A driver acts as the interface between the operating system and the hardware, translating commands and managing device functions. An outdated, corrupted, or incompatible wireless adapter driver can lead to miscommunication, causing the adapter to fail to maintain a stable connection, drop packets, or incorrectly handle roaming requests. This specific issue often manifests as intermittent disconnects affecting only that particular device, even when other clients on the same network are stable.
- ✗
AP channel is congested
Why it's wrong here
Channel congestion occurs when too many devices are transmitting on the same frequency, leading to increased collisions, retransmissions, and reduced throughput for all devices sharing that channel. If the AP channel were truly congested, multiple clients connected to that AP would experience performance degradation and frequent disconnects, not just a single laptop. The problem being isolated to one device rules out a general channel issue affecting the entire network segment.
When this WOULD be correct
In a scenario where multiple devices in the same area experience intermittent disconnections or slow speeds, especially during peak usage times, AP channel congestion would be the likely cause.
- ✗
Laptop is using the 5 GHz band while the AP uses 2.4 GHz
Why it's wrong here
A fundamental band mismatch, such as a 5 GHz-only laptop attempting to connect to a 2.4 GHz-only access point, would prevent the laptop from ever associating with the AP in the first place. If the AP supports both bands, the laptop would simply connect to the band it's configured for and that the AP offers. This scenario describes a failure to establish a connection or a stable connection on a supported band, not frequent disconnections after an initial successful connection.
When this WOULD be correct
A user reports intermittent connectivity and slow speeds on a dual-band laptop, but only when far from the AP. Other devices on 2.4 GHz work fine. The laptop is set to prefer 5 GHz, which has shorter range, causing disconnections at distance.
- ✗
Interference from microwave ovens
Why it's wrong here
Microwave ovens operate in the 2.4 GHz ISM band, which can cause significant electromagnetic interference (EMI) with Wi-Fi networks operating on the same band. However, such interference is non-discriminatory; it would disrupt the wireless signal for all 2.4 GHz devices within its effective range, not selectively target a single laptop while other nearby clients remain connected. The problem being isolated to one device indicates a client-specific issue rather than environmental interference.
When this WOULD be correct
A question where multiple devices in the same area experience intermittent disconnections, and a microwave is known to be in use nearby, would make interference the likely cause.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.
✓Laptop's wireless adapter driver is outdated or faultyCorrect answer▾
Why this is correct
A driver acts as the interface between the operating system and the hardware, translating commands and managing device functions. An outdated, corrupted, or incompatible wireless adapter driver can lead to miscommunication, causing the adapter to fail to maintain a stable connection, drop packets, or incorrectly handle roaming requests. This specific issue often manifests as intermittent disconnects affecting only that particular device, even when other clients on the same network are stable.
✗AP channel is congestedWrong answer — click to see why▾
Why this is wrong here
The question states that other devices maintain stable connections, ruling out AP channel congestion as the cause since it would affect all devices.
★ When this WOULD be the correct answer
In a scenario where multiple devices in the same area experience intermittent disconnections or slow speeds, especially during peak usage times, AP channel congestion would be the likely cause.
Why candidates choose this
Candidates may assume that any Wi-Fi issue in a specific location is due to channel congestion, overlooking that the problem is isolated to one device.
✗Laptop is using the 5 GHz band while the AP uses 2.4 GHzWrong answer — click to see why▾
Why this is wrong here
The laptop shows a strong signal and other devices work fine, so the issue is not band mismatch. If the laptop were using 5 GHz and the AP only 2.4 GHz, the laptop would not connect at all or would have no signal, not just disconnect when moving.
★ When this WOULD be the correct answer
A user reports intermittent connectivity and slow speeds on a dual-band laptop, but only when far from the AP. Other devices on 2.4 GHz work fine. The laptop is set to prefer 5 GHz, which has shorter range, causing disconnections at distance.
Why candidates choose this
Candidates may confuse band compatibility issues with general disconnection problems, assuming that a band mismatch can cause intermittent drops rather than complete failure to connect.
✗Interference from microwave ovensWrong answer — click to see why▾
Why this is wrong here
The question states that other devices maintain stable connections, ruling out environmental interference like microwave ovens. The issue is specific to one laptop, indicating a client-side problem.
★ When this WOULD be the correct answer
A question where multiple devices in the same area experience intermittent disconnections, and a microwave is known to be in use nearby, would make interference the likely cause.
Why candidates choose this
Candidates may recall that microwaves operate at 2.4 GHz and can cause Wi-Fi interference, but they overlook that the problem is isolated to one laptop, not affecting other devices.
Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Go deeper
Related to this question
Learn chapter
Troubleshoot: Network Connectivity
Key term
Wi-Fi
Wi-Fi is a technology that lets devices like laptops and phones connect to the internet or communicate with each other wirelessly using radio waves.
Key term
WLAN
A wireless local area network (WLAN) links devices using radio waves instead of cables, typically based on IEEE 802.11 standards.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This N10-009 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 N10-009 exam.