92 Part I EXAM PREPARATION Internet Information Server
92 Part I EXAM PREPARATION Internet Information Server (IIS) or COM+. Heterogeneous databases using other non-SQL Server data sources. Very large database support. There are essentially two different models in which database systems can be described: a client/server model and a desktop database system. SQL Server can be used in both instances to store data and allow for application interaction. A client/server system divides the elements of a database system into two (or more) separate components, usually executing on two or more computers. The client component is responsible for the user interface and presents the data to the user in an attractive layout. This interface can be a Windows traditional form design or an HTML-based Internet design. The server is responsible for the data storage and actual manipulations of the data. This approach divides the processing and workload between the client, the server, and in some cases other machines as well. The client/server model can be thought of as a number of workstation computers accessing a central database from a server computer. In a concise sentence, the client/server model expresses a connection between a client program running on a workstation computer requesting a service and/or data from the server. When the client application needs certain data, it fetches that data from the server. The server application in turn runs a search against the server database to find the desired records. After the records are found, the server sends them back to the client application. Inpu. Quer. Server ServerDatabase QuerySenttoServer Serversearchesdatabaseand returnsonlywantedrecords FIGURE 2.12 A basic overview of how Client/Server Clien. processes information. Machin.
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