802.11 PHY Data Rates
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802.11 PHY Data Rate

Max Data Rates

Theoretically, standards; 802.11n specifies data rates of up to 600 Mbps, and 802.11ac specifies data rates of up to 6.93 Gbps.

802.11b

802.11g

HT & VHT

MCS Modulation and Coding Schemes

http://mcsindex.com/
HT & VHT radios, define data rates based on numerous factors, including:

• modulation
• coding method
• the number of spatial streams
• channel size
• guard interval

802.11n

• MCS index between 0-31

802.11ac

MCS index between 0-9 per number of Spatial Streams used.

*10 such instances where MCS values are not supported with certain channel width and spatial stream combinations:

• MCS 6 is not supported for an 80 MHz channel when using:
  • 3 or 7 spatial streams.
• MCS 9 is not supported for an 20 MHz channel when using:
  • 1, 2, 4, 5, 7, or 8 spatial streams
• MCS 9 is not supported for an 80 MHz channel when using:
  • 6 spatial streams,
• MCS 9 is not supported for an 160 MHz channel when using:
  • 3 spatial streams.

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Reference:
Coleman, David D.,Westcott, David A. CWNA: Certified Wireless Network Administrator Official Study Guide: Exam CWNA-106 Wiley.