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Three-Tier
Intranet Applications
   

  • Many organizations currently make use of the Web within three-tier applications.

  • Three-tier design separates presentation of information from business logic and processing, and separates the latter from the company databases.

  • In tier one, "the client" runs a web browser that accesses the company intranet.

  • In the second, middle tier, a "Web server" interacts with the company's "applications server" computer and a "transactions monitor" computer to return information to the client as web pages.

  • The applications in this middle tier feed on the company databases in tier three: using database connectivity, the Web server in the middle tier calls directly to the company databases.
Diagram of 3-tier 
computing with Web components Web Client Web Server Database calls Application Server calls Balancing/Reliability Return to Client
Select the numbers 1-4 for detailed explanations.

The use of the Web in three-tier corporate applications has solved the three largest problems facing client/server corporate computing in a single swipe!

  • First, the "client" - just a Web browser - is virtually universal.

  • Second, the distribution of an application to the clients is as simple as clicking on a hyperlink.

  • Third, the company can administer all that code centrally.

Greg Hope at Microsoft notes "The Web is a huge accellerator to the three-tier paradigm. John Dawes of Netscape Enterprise Server says "You can stage it all on the middle tier, and it's instantly deployed."

If you need more details on how Rooster Graphics International can help you make use of the Web while assuring transaction integrity, security, and workload balancing, please have your organization's MIS expert contact us to inquire about our Corporate Three-tier Applications ideas.


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