Basic WLAN knowledge

 

1. There are 14 Channels in 2.4g WLAN.

2. China 1 ~ 13 channels, usually with non-overlapping Channels 1, 6, and 11 (center frequency difference between 1, 6, and 11)25 m).

3. The frequency shown in the table refers to the center frequency of the Channel. the center frequency of the adjacent channel varies by 5 m (the difference between the 13 and 14 channels is 12 m ).

4,22 mbps bandwidth per channel.

5,1. Channel start frequency: 2401 mThe termination frequency is 24023 MB.

6. The total WLAN frequency in China is 84 MB. (1 ~ 13 channel width)

7. MAC layer protocols include 802.11, 802.11b, 802.11g, 802.11a, and 802.11n.

8. 802.11 GB, up to 54 Mbps for 802.11a, and up to 600 Mbps for 802.11n.

802.11 and work in the 5G band.

Note: Memory 2412, 22, 25.