What is the main difference between a switch and a hub?

The main difference between a switch and a hub lies in how they handle data traffic on a network. A switch is designed to intelligently route data packets to specific devices, based on their MAC addresses. This means that when data is sent from one device to another, the switch will only send that information to the intended recipient, rather than broadcasting it to all devices connected to the network. This targeted approach reduces unnecessary network traffic and improves overall network efficiency.

On the other hand, a hub operates in a more basic manner by broadcasting incoming data packets to all connected devices, regardless of the intended recipient. This indiscriminate transmission can lead to network congestion, as every device receives and processes all data, even if it's not meant for them.

Therefore, the statement that a switch routes data to specific devices while a hub broadcasts data to all devices on the network accurately highlights the key functional differences between these two network devices.