Layer 3 (Network)

Layer 3, known as the Network layer, is a key part of the OSI model, which describes how data is transmitted across networks. In simple terms, it determines how data packets are routed from one device to another across different networks, ensuring they reach their intended destination. This layer uses IP addresses to identify devices and manage traffic, much like a postal service sorts and delivers mail based on addresses. By handling the path that data takes, Layer 3 plays a crucial role in enabling communication between computers, smartphones, and other devices across the internet and local networks.