Data communications involve the exchange of data between two or more devices from "summary" of Data Communications and Networking by Behrouz A. Forouzan
Data communications revolve around the transmission of data between multiple devices. This process is crucial for various applications, from email communication to online shopping. Without data communications, the vast network of interconnected devices that make up the internet would not be able to function effectively. Data is transmitted through various mediums, such as copper wires, fiber optics, and wireless channels. These mediums serve as the pathways through which data travels from one device to another. When a user sends an email, for example, the data comprising the message is broken down into packets and transmitted through the internet to reach the recipient's device. The exchange of data between devices involves a sender and a receiver. The sender initiates the communication by encoding the data into signals that can be transmitted through the chosen medium. ...
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