200-301 Question 122
Select 3A network administrator is troubleshooting a Wi-Fi performance issue in an office building. They suspect interference is causing the problem. Which of the following wireless principles are most relevant to mitigating interference in this scenario?
- A
Channel selection and channel overlap
- B
Signal-to-noise ratio (SNR)
- C
Antenna polarization
- D
Data encryption standards
- E
Transmit power control (TPC)
Show answer and explanation
Correct answers: A, B, E
Explanation
Mitigating interference in a wireless network often involves addressing channel selection to minimize overlap, optimizing the signal-to-noise ratio for better signal quality, and using transmit power control to reduce unnecessary interference with nearby devices. These principles directly impact Wi-Fi performance in environments with potential interference.
- A. Correct.
Channel selection and channel overlap are critical because overlapping channels on the same frequency can cause interference between Wi-Fi networks in close proximity.
- B. Correct.
Signal-to-noise ratio (SNR) measures the quality of the wireless signal compared to background noise. A higher SNR indicates less interference and better performance.
- C. Incorrect.
Antenna polarization is related to the orientation of the antennas and does not directly address interference caused by overlapping Wi-Fi signals or external noise.
- D. Incorrect.
Data encryption standards, such as WPA2 or WPA3, are related to security and do not impact interference or signal quality.
- E. Correct.
Transmit power control (TPC) can help manage interference by adjusting the signal strength to avoid overlapping with nearby networks or devices.