Multitier Application Services
The concept of the multitier application services was born with the advent of remote OLE automation. Using this technology, it became possible to use remote procedure calls to access instances of components executing on another computer. The technique appeared seamless on the client application. It was as if the remote component were running locally. This ability allowed traditional two-tier client/server applications to include a middle tier that could contain business rules, act as a proxy to the database server, and provide other services. The three tiers were traditionally labeled the database, business rules, and presentation layers. While this solved some problems, it created new ones. How do we manage all ...
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