Client-Server

Client-Server networks are comprised servers -- typically powerful computers running advanced network operating systems -- and user workstations (clients) which access data or run applications located on the servers. Servers can host e-mail; store common data files and serve powerful network applications such as Microsoft's SQL Server. As a centerpiece of the network, the server validates logins to the network and can deny access to both networking resources as well as client software. Servers are typically the center of all backup and power protection schemas.