Wireless LAN Topologies
Up to this point, this book has discussed radio frequency (RF) signals as they travel from a transmitter to a receiver. As Figure 5-2 shows, the transmitter can contact the receiver at any and all times, as long as both devices are tuned to the same frequency (or channel) and use the same modulation and coding scheme. That all sounds simple, except that it is not really practical.
Figure 5-2 Unidirectional Communication.
To fully leverage wireless communication, data should travel in both directions, as shown in Figure 5-3. Sometimes Device A needs to send data to Device B, while Device B would like to take a turn to ...
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