Why do I even pay money for the question catalogue if so many questions are answered incorrectly? You still learn the wrong things if you don‘t pay attention. That sucks!!!
The correct answer is:
D. to reduce interference
The role of nonoverlapping channels in a wireless environment is to reduce interference between wireless devices. In wireless networks, such as Wi-Fi networks, different devices transmit data wirelessly using specific frequency bands. These frequency bands are divided into channels, which act as virtual pathways for data transmission.
When multiple wireless devices operate in close proximity and use overlapping channels, there is a potential for interference. Interference occurs when devices in overlapping channels transmit signals simultaneously, leading to signal degradation and reduced performance.
Nonoverlapping channels are spaced far enough apart to minimize interference between adjacent channels. By assigning wireless devices to nonoverlapping channels, network administrators can reduce interference and improve overall network performance. This allows devices operating on different channels to transmit data without significantly overlapping with adjacent channels.
Therefore, the primary role of nonoverlapping channels in a wireless environment is to reduce interference, enhancing the stability and reliability of wireless communication.
Considering the 2.4 GHz band is only 100 MHz wide, the 11 channels of 20 MHz overlap with one another. This is what causes the interference on your network and a lag in your WiFi's performance. Certain channels yield better WiFi performance than others because they are non-overlapping.
https://www.minim.com/blog/wifi-channels-explained#:~:text=Considering%20the%202.4%20GHz%20band,because%20they%20are%20non%2Doverlapping.
" to reduce interference" would make sense too I presume
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