Protocols define rules for communication between devices from "summary" of Data Communications and Networking by Behrouz A. Forouzan
The establishment of rules for communication between devices is a crucial aspect of data communications. These rules, known as protocols, govern how data is exchanged between devices in a network. Without protocols, devices would not be able to understand each other's signals, leading to communication failures. Protocols define various aspects of communication, including the format of data, the timing of transmission, and error detection and correction methods. By following these rules, devices can ensure that data is transmitted accurately and efficiently. For example, protocols dictate the order in which bits are transmitted, ensuring that data is received in the correct sequence. In addition to defining the format of data, protocols also specify the roles of devices in a network. For instance, in a client-server architecture, protocols determine how clients request services from servers and how servers respond to these requests. By defining these roles, protocols facilitate efficient communication between devices. Furthermore, protocols establish standards for different types of networks, such as wired and wireless networks. This standardization ensures interoperability between devices from different manufacturers and enables seamless communication across diverse networks. For example, the Ethernet protocol defines how devices connect to a local area network, allowing them to communicate effectively.- Protocols play a crucial role in enabling communication between devices in a network. By defining rules for data exchange, these protocols ensure that devices can communicate effectively and reliably. Without protocols, the complex processes involved in data communications would not be possible, leading to communication breakdowns and inefficiencies.
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