CCNA: Cisco Certified Network Associate — Question 1092

How is noise defined in Wi-Fi?

Answer options

• A. measured difference between the desired Wi-Fi signal and an interfering Wi-Fi signal
• B. any interference that is not Wi-Fi traffic that degrades the desired signal
• C. signals from other Wi-Fi networks that interfere with the local signal
• D. ratio of signal-to-noise rating supplied by the wireless device

Correct answer: B

Explanation

The correct answer, B, accurately describes noise as any interference that is not from Wi-Fi traffic that diminishes the quality of the desired signal. Option A refers to a specific type of interference rather than general noise. Option C is too specific to other Wi-Fi networks, while D talks about a measurement rather than defining noise itself.