Have you ever connected your laptop to Wi-Fi, opened a browser, typed a URL, and wondered: "How does my message actually reach the right computer?" As developers, we often work with APIs, servers, ports, IP addresses, localhost, Docker networks, cloud servers, and routers. But networking can feel confusing because many explanations jump straight into heavy terms. So let's slow down and make it simple. In this post, we'll understand three important network devices: Hub Switch Router We'll also see how data moves from one computer to another inside a local network, and how your computer decides whether to send data directly to another device or through the router. This article is based on the provided networking class transcript about hubs, switches, routers, MAC tables, and internal communication. First, Imagine a Small Room Full of Computers Imagine five computers connected in the same room. One computer wants to send a message to another computer.…