The following diagram displays multi-tiered logical application architecture for
mobile health clinics support.
This logical architecture shows the application as a multi-tiered client/server (C/S) model in which two integration layers surround the business logic.
· The front-end integration layer takes into account the wide range of devices (laptops, Web browsers, PDAs, cellular phones) and applications (desktop or mainframe-based) that you need to communicate with.
· The back-end integration is used to connect to various local as well as remote (external trader applications and databases). Notice that both integration layers are triangular, i.e., the integration glue is thin in some cases but quite thick in others. For example, integration with Web-based applications requires less effort than a mainframe-based application. The integration effort also depends on whether you are interacting with local (i.e., within the same enterprise) or external applications.
This architecture can be used to study the inter-plays between the infrastructure components and to study integration/migration issues, and to address operational issues such as performance, fault tolerance, security, and manageability.
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Contributed by John Knapp, edited and expanded by A. Umar