Communications is the art of transmitting an idea from the mind of one person to the mind of another, with understanding. Understanding is the keyword.
A classical communications model, shown in Figure 11-1, consists of a sender who is developing, coding, and transferring information through certain message channels to a receiver. When the receiver is reached, the message is decoded, filtered, and then studied. The receiver usually sends his feedback to the sender through a feedback channel. The overall model is called the loop of understandinc|.
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