Exploring a Classic Three-Tier Architecture
Windows DNA is nothing new; it is a classic three-tier architecture (see Figures 1.1 and 1.2). The tiers are data, business logic, and presentation. These are logical, not physical, tiers—that is, they all can run on a single computer or be distributed across hundreds of computers. The goal is to categorize by functionality the components that will live in each tier. Each week of this book is dedicated to covering one of these tiers. As you complete this book you will know the purpose of each tier and what functionality they contain.
Figure 1.2. A Windows DNA model.
The components that live in the presentation ...
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