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220-1202 Practice Question: That their Windows 11 laptop can see the office…
A user reports that their Windows 11 laptop can see the office Wi-Fi network but fails to connect, displaying 'Can't connect to this network'. Other users with the same laptop model connect without issues. The network uses WPA2-PSK with AES. What should you check first?
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
✓
Forget the network on the laptop and reconnect by entering the passphrase again.
A mismatch in the saved passphrase is a common cause of connection failures when the network is visible. The correct answer is to forget the network and re-enter the correct passphrase. This tests troubleshooting skills for wireless authentication issues.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Update the wireless adapter driver.
Why it's wrong here
While outdated or corrupted drivers can certainly cause wireless connectivity issues, the fact that other identical laptops successfully connect to the same Wi-Fi network strongly indicates that the fundamental wireless adapter hardware and its general driver functionality on the problematic laptop are not the root cause. A driver update would be a more appropriate troubleshooting step if the laptop couldn't detect any wireless networks at all, or if multiple devices of the same model experienced similar issues, suggesting a systemic driver problem.
- ✗
Change the router's security protocol to WPA3.
Why it's wrong here
Changing the router's security protocol, for example, from WPA2 to WPA3, is a network-wide configuration alteration that would affect all devices attempting to connect to that Wi-Fi network. Such a change could potentially disrupt service for other users, especially if their devices do not support the new protocol or require re-authentication. This is not a targeted solution for a single laptop experiencing an isolated connection problem when other devices connect without issue.
- ✓
Forget the network on the laptop and reconnect by entering the passphrase again.
Why this is correct
Forgetting the network on the laptop purges the stored Wi-Fi profile, which includes any potentially corrupted or incorrect security keys, SSIDs, and network settings cached by the operating system. Reconnecting forces the laptop to perform a fresh authentication handshake with the access point, prompting the user to re-enter the passphrase. This action is crucial for resolving issues stemming from an incorrect or expired saved credential, effectively resetting the client-side network configuration for that specific SSID.
- ✗
Disable the firewall on the laptop.
Why it's wrong here
A software firewall primarily operates at the network and transport layers to control inbound and outbound data packets based on defined rules, typically blocking unauthorized access or suspicious traffic. However, Wi-Fi connection failures at the initial association or authentication stage occur at lower layers of the OSI model, before the firewall even has a chance to inspect application-level traffic. Disabling the firewall would therefore not resolve an inability to establish a basic wireless link or authenticate with the access point.
Quick reference
Symmetric Encryption Algorithm Comparison
| Algorithm | Key Size | Block Size | Status | Notes |
|---|---|---|---|---|
| AES-128 | 128-bit | 128-bit | Current standard | NIST approved; WPA3, TLS |
| AES-256 | 256-bit | 128-bit | Current standard | Preferred for sensitive / govt data |
| 3DES | 112-bit effective | 64-bit | Deprecated (2023) | Replaced by AES |
| DES | 56-bit | 64-bit | Broken | Cracked in < 24 h; never deploy |
| ChaCha20 | 256-bit | Stream cipher | Current | TLS 1.3, WireGuard |
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1202 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 220-1202 exam.