What is a network switch? simple explanation

A switch is a device used in networks to connect multiple devices like computers and printers. It helps these devices communicate with each other efficiently. Here’s how it works:

1. Learning: When a device sends data, the switch learns the device's address and remembers which port it's connected to.

2. Forwarding: When data comes in, the switch checks its memory to see where to send it. If it knows the destination, it sends the data directly. If not, it sends the data to all connected devices to find the right one.

3. Filtering: The switch ensures that data only goes to the intended device, reducing unnecessary traffic.

4. Full-Duplex Mode: Modern switches allow devices to send and receive data at the same time, making communication faster.

In simple terms, a switch is like a smart traffic controller for a network, directing data where it needs to go quickly and efficiently.

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