802.11 is standard of local area network.

802.11 a/b/g/n/ac/ax/be all developped from 802.11, a/b/g/n/ac/ax/be stands different physical layer standard and different transmission rate, below is the list.

802.11： 2.4GHz, FHSS or DSSS signal, transmission rate 2Mbps;

802.11a： 5GHz, OFDM signal, transmission rate 54Mbps;

802.11b： 2.4GHz, HR-DSSS signal, transmission rate 11Mbps;

802.11g： 2.4GHz, OFDM signal, transmission rate 54Mbps, compatible 802.11b;

802.11n(wifi 4)： 2.4GHz/5GHz, OFDM signal, transmission rate 540Mbps, compatible 802.11a/b/g;

802.11ac(wifi 5)： 2.4GHz/5GHz, OFDM signal, 2.4G transmission rate 400Mbps, 5G transmission rate 900Mbps, compatible 802.11a/b/g/n, can assign 2 ssid work in different frequency;

802.11ax(wifi 6)： 2.4GHz/5GHz, OFDMA signal, transmission rate 11Gbps，can assign 2 ssid work in different frequency;

802.11be(wifi 7)： 2.4GHz/5GHz/6GHz, OFDMA signal, transmission rate 46Gbps，can assign 2 ssid work in different frequency;