802.11

Question 1

802.11b

Answer 1

Frequency: 2.4 GHz
Spectrum: DSSS (Direct-Sequence Spread-Spectrum)
Speed: 11Mbps
Range: 300 feet

Question 2

802.11a (Wi-Fi 2)

Answer 2

Frequency: 5.0 GHz
Spectrum: OFDM (Orthogonal Frequency-Division Multilplexing)
Speed: 54Mbps
Range: 150 feet

Question 3

802.11g (Wi-Fi 3)

Answer 3

Frequency: 2.4 GHz
Spectrum: OFDM (Orthogonal Frequency-Division Multilplexing)
Speed: 54 Mbps
Range: 300 feet
Backwards Compatibility: 802.11b

Question 4

802.11n (Wi-Fi 4)

Answer 4

Frequency: 2.4 GHz
Spectrum: OFDM (QAM)
Speed: 100+ Mbps
Range: 300 feet
Backward Compatibility: 802.11/b/g

Question 5

802.11ac (Wi-Fi 5)

Answer 5

Frequency: 5.0 GHz
Spectrum: OFDM (QAM)
Speed: up to 1 Gbps
Range: 300 feet
Backward Compatibility: 802.11a

Question 6

802.11ax (Wi-Fi 6)

Answer 6

Frequency: 2.4 GHz, 5.0 GHz, 6.0 GHz
Spectrum: OFDMA (1024-QAM) Orthogonal Frequency-Division Multiple Access
Speed: up to 10 Gbps
Range: 300 feet
Backward Compatibility: 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac