-Distributed system model which shows how data and processing is distributed across a range of components.
-Set of stand-alone servers which provide specific services such as printing, data management, etc.
-Set of clients which call on these services.
-Network which allows clients to access servers.



-The application is modelled as a set of services that are provided by servers and a set of clients that use these services.
-Clients know of servers but servers need not know of clients.
-Clients and servers are logical processes
-The mapping of processors to processes is not necessarily 1 : 1.

A client-server system:



Computers in C/s network: