The client/server model splits an application into two parts on a network: the client side used by individual users, and the server side that supports multiple clients. This setup allows for shared access to various resources like databases, printers, and file storage. The shift from centralized to distributed computing has led to two types of networks: hierarchical and distributed architectures. Companies investing in client/server applications are increasingly reliant on enterprise networks, with $20 million spent annually on network support.