In computer networks server is someone who runs a server programs which share their resources with client. A client does not share any of its resources, but it requests content or service form a server. Client, therefore, initiate communication sessions with servers, which await incoming requests. Client’s and servers are core of world wide web. Client and server exchange messages in a request-response messaging pattern.The client sends a request, and the server returns a response. This exchange of messages is an example of inter-process communication.Communication between nodes in network is contolled by various protocols.Client,server can communicate either over tcp (transmission control protocol) or udp (user datagram protocol).udp is a stateless protocol and dosen’t guarantee the delivery of packets to their destination.Where as tcp guarantees the delivery of packets.Tcp connections are initiated with a three way handshake.On the whole Client/server systems have become the computing and application architecture for business organizations across the globe. Speaking in technical terms, a client/server system puts application processing close to the user; helping improve the performance.
