200-301 · Question #1524
How is noise defined in Wi-Fi?
The correct answer is B. any interference that is not Wi-Fi traffic that degrades the desired signal. In Wi-Fi, noise is defined as any electromagnetic interference that is not Wi-Fi traffic itself but still degrades the quality of the desired signal.
Question
How is noise defined in Wi-Fi?
Options
- Ameasured difference between the desired Wi-Fi signal and an interfering Wi-Fi signal
- Bany interference that is not Wi-Fi traffic that degrades the desired signal
- Csignals from other Wi-Fi networks that interfere with the local signal
- Dratio of signal-to-noise rating supplied by the wireless device
How the community answered
(47 responses)- A4% (2)
- B94% (44)
- C2% (1)
Why each option
In Wi-Fi, noise is defined as any electromagnetic interference that is not Wi-Fi traffic itself but still degrades the quality of the desired signal.
This describes the Signal-to-Interference Ratio (SIR) or a similar measurement, not the definition of noise itself.
Noise in a Wi-Fi environment refers to any unwanted radio frequency (RF) energy that originates from non-Wi-Fi sources, such as microwave ovens, cordless phones, or electrical motors, which interferes with and degrades the legitimate Wi-Fi signal.
Signals from other Wi-Fi networks are typically categorized as Co-Channel Interference (CCI) or Adjacent Channel Interference (ACI), which are forms of Wi-Fi interference, not general background noise.
This describes the Signal-to-Noise Ratio (SNR), which is a metric representing the quality of a signal relative to the level of background noise, rather than the definition of noise itself.
Concept tested: Wi-Fi noise definition
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-0/configuration/guide/b_cg80/b_cg80_chapter_01000.html
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