Client / Server Design

Applications are usually designed so that one computer (or end system) acts as a server, providing a service to other computers on a network. To access a server, a program is run on a users computer, this is called a client program. The program establishes a connection through the network allowing communication with the server.

Client / Server interaction across a packet data network

The client/server design is central to most applications programs which use networks. These examples include: