CompTIA A+ Core 1 (220-1201)Hardware and Network TroubleshootingMedium
A technician is setting up a new Wi-Fi access point (AP) in an office with multiple existing APs. After installation, users connected to the new AP report very slow speeds and frequent disconnections, while users on older APs are unaffected. The technician suspects Wi-Fi interference. Which of the following is the MOST effective first step to diagnose and resolve this issue?
- AIncrease the transmit power of the new AP.
- BEnable Quality of Service (QoS) on the new AP.
- CPerform a site survey to identify channel utilization and signal strength.
- DUpdate the new AP's firmware to the latest version.
Show answer & explanationAnswer & explanation
Correct answer: C. Perform a site survey to identify channel utilization and signal strength.
Slow speeds and frequent disconnections on a new AP, especially in an environment with existing APs, strongly suggest Wi-Fi interference. A site survey is the most effective first step to identify existing Wi-Fi networks, their channels, signal strengths, and potential sources of interference, allowing for optimal channel selection and AP placement.
Why the other options are wrong
- A. Increasing transmit power indiscriminately can worsen interference by making the new AP's signal stronger on an already congested channel, negatively impacting other APs as well.
- B. Enabling QoS prioritizes certain traffic but won't resolve underlying channel interference that reduces overall bandwidth and causes disconnections.
- D. Updating firmware is a good general maintenance practice but less likely to directly resolve specific interference issues without knowing the source.
Wi-Fi Site Survey
A process of planning and designing a wireless network to provide adequate signal coverage, data rates, and network capacity, while minimizing interference.
- Involves using specialized software and hardware to analyze the RF environment.
- Identifies existing Wi-Fi networks, signal strengths, and channel usage.
- Helps in optimal placement of APs and selection of non-overlapping channels.
Memory trick: When Wi-Fi slows down and drops, you need a survey to see what's jamming the airwaves.