Two-tiered architecture, Basic Computer Science

Two-tiered architecture:

This approach basically introduced a database server to replace the file server. The emergence of relational database management systems and graphical user interface applications led to database server which could be accessed through the GUI based client applications. Since,  the clients query the database over the network and only the relevant data is supplied to the client, the network traffic is greatly reduced in comparison to the file server system.  

The application or business logic in client server applications may reside on the server (fat server -  thin client) or on the client (fat client -  thin server).   Since,  clients and server interact over the network, increases in the number of users often lead to network congestion. Also, maintenance of the application becomes difficult with more users. This lack of scalability (Ability of a system to support increased demands of work, usage or service levels almost instantly, without any change and with no significant drop in cost effectiveness or quality of service) and flexibility gave rise to 3-tiered and n-tiered architectures.  

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Posted Date: 10/23/2012 5:25:26 AM | Location : United States

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