PHYSICAL LAYER AND TRANSMISSION MEDIA
TRANSMISSION MEDIA
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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12 Channels
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13 Channels
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14 Channels
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15 Channels
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Detailed explanation-1: -As shown in Figure 8-7, the 2.4 GHz frequency band is divided into 14 overlapping 20 MHz channels numbered from 1 to 14. Adjacent channels overlap. On the 2.4 GHz frequency band, channels spaced at least three channels apart (for example channel 1 and 5) do not overlap, as shown in Figure 8-7.
Detailed explanation-2: -A 2.4 GHz network operates in the frequency range of 2.4 and 2.5 GHz. In this frequency range that spans 100 MHz, there are 14 channels, and each channel is 20 MHz wide. Because 100 MHz can’t be divided into 14 20 MHz channels, Wi-Fi channels always interfere.
Detailed explanation-3: -According to WLAN standards and protocols, the 2.4 GHz frequency band is divided into 13 overlapping channels. Each channel uses a specific bandwidth (20 MHz for each 802.11g or 802.11n channel, and 22 MHz for each 802.11b channel) and has its own center frequency.
Detailed explanation-4: -(2.4 Ghz) RF. RF refers to the electromagnetic wave frequencies within a range of 3 kHz to 300 GHz, including the frequencies used for communications or Radar signals.