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Scalable VoIP Mobility by Joseph Epstein

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5.4. Wi-Fi's Approach to Wireless
The designers of 802.11 took into account the RF properties to create a technology that could transmit in the face of the obstacles in RF environments. Over time, they developed multiple differing, but related, radio technologies that built upon each one's previous 802.11 radio types and modern RF design principles to continue to improve the speed, range, and resiliency of the transmissions.
Let's look at the principles behind 802.11 transmissions at the physical layer.
5.4.1. Data Rates
A data rate, in 802.11, is the rate of transmission, in megabits per second (Mbps) of the 802.11 header and body. The 802.11 MAC header, the body, and the checksum (but not the physical layer header) are transmitted at the same data ...

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