26.3. Multitier Application Architecture
Web-based applications are multitier applications (sometimes referred to as n-tier applications) that divide functionality into separate tiers (i.e., logical groupings of functionality). Although tiers can be located on the same computer, the tiers of web-based applications typically reside on separate computers. Figure 26.3 presents the basic structure of a three-tier web-based application.
Figure 26.3. Three-tier architecture.
The bottom tier (also called the data tier or the information tier) maintains the application’s data. This tier typically stores data in a relational database management system ...
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