802.11 or WIFI

Question 1

802.11a

Answer 1

5GHz, 54 Mbit/s 20MHz channel width

Question 2

802.11b

Answer 2

2.4GHz, 11 Mbit/s (better range than a), 22GHz channels

Question 3

802.11g

Answer 3

2.4 GHz, 54 Mbit/s, 20MHz channels

Question 4

802.11n (WiFi 4)

Answer 4

5 GHz or 2.4 GHz, 600 Mbit/s, 20 and 40 MHz channel widths (uses MIMO), 150 Mbit/s per stream

Question 5

802.11ac (wifi 5)

Answer 5

5 GHz, 160 MHz channels (eight MU-MIMO), 1.3 Gbit/s
(8x DL MU-MIMO) 867 Mbit/s per stream

Question 6

802.11ax (wifi 6)

Answer 6

5 GHz and 2.4 GHz, (20,40,80 and 160 MHz channel widths)
1201 Mbit/s per channel (8 bi directional MU-MIMO streams)(OFDMA)
(8x DL and UL MU-MIMO) 3.5Gbit/s throughput