All e-com applications follow the client-server model. Clients are devices pus software that request information from servers. It replaces traditional mainframe based models, which meant dumb terminals to a computer. It is too costly and slow to cope with new data types like audio and video. Client-server architecture links PC’s to a storage server, where most of the computing is done on clients.
The client-server model allows client to interact with the server through a request –reply sequence known as message passing. Server manages application tasks, handles storage and security and provides scalability: ability to add customers as needed.
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