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CISSP Training Kit by David R. Miller

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Application architecture

To improve availability, performance, and security, many enterprise-level client and server applications are constructed in layers. On the client side, users launch client applications and browsers. This front-end, client-side function usually requires limited processing, primarily providing connectivity to presentation servers. The presentation servers accept inbound connections from clients and establish communications with back-end application servers. The back-end application server is where the real number crunching and processing occurs and is often where some valuable intellectual property, in the form of custom program code, exists. These back-end application servers connect to one or more data repositories. The ...

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