The OSI Model

The OSI Model is a framework that organizes how data moves between devices in a network. It has seven layers, from the physical hardware (like cables and switches) up to application programs (like browsers). Each layer has a specific role, such as transmitting raw signals, managing data packets, or ensuring data reaches the right application. This layered approach helps different devices and technologies communicate smoothly, troubleshooting issues, and designing networks efficiently. Think of it as a step-by-step process where each layer performs its part to deliver information accurately and securely from one device to another.