What is difference between hub, switch and router?
Hubs, switches and routers are all devices which let you connect one or more computers to other computers, networked devices or to other networks. Each has two or more connectors, called ports, into which you plug in the cables to make the connection. Varying degrees of magic happen inside the device, and therein lies the difference. I often see the terms misused, so let’s clarify what each one really means. A hub is typically the least expensive, least intelligent, and least complicated of the three. Its job is very, very simple: anything that comes in one port is sent out to the others. That’s it. Every computer connected to the hub “sees” everything that every other computer on the hub sees. The hub itself is blissfully ignorant of the data being transmitted. For years, simple hubs have been quick and easy ways to connect computers in small networks. A switch does essentially what a hub does, but more efficiently. By paying attention to the traffic that comes across it, it can “lear
