A server is a computer or device on a network that stores, processes, and delivers data or services to other devices on the same network.
The client is the device that requests data or services from the server. Servers can be dedicated to a single client, or they can provide services to multiple clients simultaneously.
The type of service provided by a server depends on its role in the network. For example, some servers act as file servers and store data files that client computers can share on the network. Other servers act as database servers and store database files that client computers can access.