Protocol Data Unit

A Protocol Data Unit (PDU) is a package of data transmitted between different layers of a network. Think of it as a formatted container that includes both your actual information (like a message or file) and the necessary headers or metadata required for the network to understand, route, and deliver the data correctly. Each layer in the network stack creates or processes its own type of PDU, ensuring smooth communication across devices. In essence, PDUs are the standardized way data is packaged and exchanged, enabling reliable and organized digital communication.