User Access Services: Web Farms
Web servers provide the link between the presentation and business logic and the client user. The omnipresence of the browser makes application access available to anyone, anywhere, anytime, and on virtually any device. However, a web server represents a SPOF in the enterprise architecture unless measures are taken to ensure its continued availability. The following paragraphs describe how web farms can guarantee continuous availability and massive scalability for user connectivity.
Web services such as Hypertext Transfer Protocol (HTTP), Java, Active Server Pages (jsp and asps), and common gateway interface (CGI) are often implemented with the “rack and stack” approach. Large ISPs deploy hundreds, or even thousands, ...
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