Ideas Behind Three-tier Computing
With the rise of less costly, faster, and more reliable networking software and hardware, most large enterprises organize their infrastructure on some variant of a three-tiered computing approach, outlined as follows.
First Tier
In its simplest form, computing networks today in any large enterprise environment store their data in a back-end system. This back end, or first tier, is actually where all of the data used in the organization is collected and retrieved for mining, editing, and storage. Typically, this data is organized in a large back-end database, such as the software products from Oracle,[10] Sybase, and Informix.
[10] Oracle is a registered U.S. trademark of Oracle Corporation, Redwood City, California. ...
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