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What is a computer network?

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Quick answer

A computer network is a group of devices connected so they can share data and resources. From a home Wi-Fi setup to the global internet, networks let computers, phones, and servers communicate using shared rules called protocols. It's devices linked to share data and resources.

Key things to understand

  1. It's devices linked to share data and resources.
  2. They communicate using rules called protocols.
  3. Networks range from home Wi-Fi to the global internet.
  4. Hardware like routers and switches connects them.

People also ask

What is a computer network?
A set of connected devices that can communicate and share data and resources with each other.
What's the difference between a LAN and WAN?
A LAN covers a small area like a home or office; a WAN spans large distances, like the internet.
What is a network protocol?
A shared set of rules that lets devices format, send, and understand data, like TCP/IP.

Part of the guide: How the Internet Works →