Many devices share one channel and none of them can listen while it is sending. This part is about the rules that let them take turns, and about how the generations of Wi-Fi changed what a turn is worth.
TopicsStart with the rules, then the frames, then the generations
Access to the channelMACCSMA/CA, backoff, collisions, hidden nodes and what 54 Mbit/s really delivers.Inside every frameFramesThe MAC header of each protocol, field by field: what was added, how many bytes, and why.Wi-Fi 1 to 7GenerationsWhat each amendment added, and the highest speed it allows.
Where this fits. The band topics say where Wi-Fi sits in the spectrum and the modulation topics say how a signal is built. This part says who may send and when.