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

The key difference between a hub and a switch revolves around how they handle data transmission within a network. A hub is a basic networking device that broadcasts incoming data packets to all connected devices, regardless of the intended recipient. This means every device receives the same data, leading to higher chances of collisions and greater network congestion.

In contrast, a switch is more intelligent; it can effectively identify the destination of data packets. When a switch receives a packet, it analyzes the packet's header to determine the specific port associated with the intended recipient device. It sends the data only to that designated port, resulting in improved performance and reduced network traffic. This targeted approach enhances efficiency and security, as only the intended device receives the relevant data.

In summary, the distinction lies in the method of data delivery: a hub disseminates data broadly to all devices, while a switch delivers it selectively to the specified device.