CompTIA A+ Core 1 (220-1201)Hardware and Network TroubleshootingMedium
A technician is setting up a new Wi-Fi access point (AP) in a dense office environment with several existing APs. After configuring the new AP, client devices report intermittent connectivity and slow speeds when connected to it. A site survey reveals high levels of interference. Which of the following adjustments should the technician make to the new AP's configuration to mitigate this issue?
- AIncrease the transmit power of the AP.
- BSwitch from WPA3 to WPA2 encryption.
- CChange the Wi-Fi channel to a non-overlapping channel.
- DEnable QoS (Quality of Service) settings.
Show answer & explanationAnswer & explanation
Correct answer: C. Change the Wi-Fi channel to a non-overlapping channel.
High levels of interference in a dense Wi-Fi environment, leading to intermittent connectivity and slow speeds, are often caused by channel overlap. Changing the Wi-Fi channel to a non-overlapping one (e.g., 1, 6, or 11 in 2.4 GHz) will significantly reduce co-channel interference.
Why the other options are wrong
- A. Increasing transmit power would worsen interference with other APs in a dense environment.
- B. Switching encryption types affects security, not directly interference or performance issues unless the previous encryption was causing compatibility problems.
- D. Enabling QoS prioritizes certain traffic but does not address underlying interference issues causing slow speeds and intermittent connectivity.
Wi-Fi Channel Optimization
The process of selecting appropriate Wi-Fi channels to minimize interference and maximize network performance in a given environment.
- In 2.4 GHz, channels 1, 6, and 11 are non-overlapping.
- Channel selection is critical in dense environments with multiple access points.
- Proper channel planning reduces co-channel interference and improves throughput.
Memory trick: To avoid a Wi-Fi fight, pick a channel that gives space and light.