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Lexikon


three-tier


A ref="module.php?name=Lexikon&file=search&eid=1&query=client-server">client-server architecture in which the ref="module.php?name=Lexikon&file=search&eid=1&query=user interface">user interface, functional process logic ("business rules") and data storage and access are developed and maintained as independent ref="module.php?name=Lexikon&file=search&eid=1&query=modules">modules, most often on separate ref="module.php?name=Lexikon&file=search&eid=1&query=platforms">platforms. Apart from the usual advantages of modular software with well defined interfaces, the three-tier architecture is intended to allow any of the three tiers to be upgraded or replaced independently as requirements or technology change. For example, an upgrade of desktop ref="module.php?name=Lexikon&file=search&eid=1&query=operating system">operating system from ref="module.php?name=Lexikon&file=search&eid=1&query=Microsoft Windows">Microsoft Windows to ref="module.php?name=Lexikon&file=search&eid=1&query=Unix">Unix would only affect the {user interface} code. Typically, the user interface runs on a desktop ref="module.php?name=Lexikon&file=search&eid=1&query=PC">PC or ref="module.php?name=Lexikon&file=search&eid=1&query=workstation">workstation and uses a standard ref="module.php?name=Lexikon&file=search&eid=1&query=graphical user interface">graphical user interface, functional process logic may consist of one or more separate modules running on a ref="module.php?name=Lexikon&file=search&eid=1&query=workstation">workstation or application ref="module.php?name=Lexikon&file=search&eid=1&query=server">server, and an ref="module.php?name=Lexikon&file=search&eid=1&query=RDBMS">RDBMS on a database server or ref="module.php?name=Lexikon&file=search&eid=1&query=mainframe">mainframe contains the data storage logic. The middle tier may be multi-tiered itself (in which case the overall architecture is called an "n-tier architecture"). (1998-05-13)

In addition suitable contents:
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ref="module.php?name=Lexikon&op=content&tid=8660">nl ] [ ref="module.php?name=Lexikon&op=content&tid=8672">nn ] [ ref="module.php?name=Lexikon&op=content&tid=8675">no ] [ ref="module.php?name=Lexikon&op=content&tid=8760">ns ] [ ref="module.php?name=Lexikon&op=content&tid=8781">n-tier ] [ ref="module.php?name=Lexikon&op=content&tid=8964">om ] [ ref="module.php?name=Lexikon&op=content&tid=9014">op ] [ ref="module.php?name=Lexikon&op=content&tid=9061">operating system ] [ ref="module.php?name=Lexikon&op=content&tid=9204">pa ] [ ref="module.php?name=Lexikon&op=content&tid=9390">PC ] [ ref="module.php?name=Lexikon&op=content&tid=9457">pe ] [ ref="module.php?name=Lexikon&op=content&tid=9544">pg ] [ ref="module.php?name=Lexikon&op=content&tid=9550">ph ] [ ref="module.php?name=Lexikon&op=content&tid=9651">pl ] [ ref="module.php?name=Lexikon&op=content&tid=9683">platform ] [ ref="module.php?name=Lexikon&op=content&tid=9908">pr ] [ ref="module.php?name=Lexikon&op=content&tid=9995">process ] [ ref="module.php?name=Lexikon&op=content&tid=10253">query ] [ ref="module.php?name=Lexikon&op=content&tid=10364">rc ] [ ref="module.php?name=Lexikon&op=content&tid=10376">RDBMS ] [ ref="module.php?name=Lexikon&op=content&tid=10385">re ] [ ref="module.php?name=Lexikon&op=content&tid=10572">requirements ] [ ref="module.php?name=Lexikon&op=content&tid=10767">ro ] [ ref="module.php?name=Lexikon&op=content&tid=10887">ru ] [ ref="module.php?name=Lexikon&op=content&tid=10892">run ] [ ref="module.php?name=Lexikon&op=content&tid=10918">S ] [ ref="module.php?name=Lexikon&op=content&tid=11150">se ] [ ref="module.php?name=Lexikon&op=content&tid=11259">serve ] [ ref="module.php?name=Lexikon&op=content&tid=11261">server ] [ ref="module.php?name=Lexikon&op=content&tid=11376">si ] [ ref="module.php?name=Lexikon&op=content&tid=11510">sk ] [ ref="module.php?name=Lexikon&op=content&tid=11651">so ] [ ref="module.php?name=Lexikon&op=content&tid=11680">software ] [ 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