* Brief explaining: proxy configuration can be done in three ways:
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*** Explicit Proxy – A single proxy is specified in the browser with a literal proxy bypass list.
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*** PAC File – The location of a PAC file is specified (e.g. hosted locally or on a web server) in the browser. The PAC file can provide proxy fail-over support, advanced proxy bypass support , and much more (see below).
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*** WPAD – Only requiring a check box be selected in the browser, the browser may use DHCP or DNS in attempt to guess the location of the PAC file.