### Instruction:
What is a computer network?

### Response:
A computer network are groups of computers than can communicate with each other through a LAN or Local Area Network.  In the early days of networking they all had to be hard wired and with the development of newer technology networks could communicate and be setup over wireless.  Computer networks also share data and devices with each other.  For example a shared printer can be used by multiple devices on the same computer network.