what is basically client server systems?

client-server systems are having clients and server which processes some kind of data

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The client–server model of technology is a distributed application structure that segmentation tasks or workloads between the providers of a service, called servers, and service requester, called clients.Client/server model can be used by programs within a individual computer, it is a more essential concept for networking. In this case, the client set up a connection to the server over a local area network (LAN) or wide-area network (WAN), such as the Internet. 

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