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.Resource Location DirectivesThese directives help the server find files.They define places where you can put CGI programs, or where documents you publish on the Web live.Resource-Management DirectivesResource-management directives control issues that affect the performance of the server.Default settings for many of these directives should not be changed unless there's a good reason for it, and you understand what you are doing.Apache manages many of its resources dynamically.Arbitrarily modifying these default settings can adversely affect the performance of the server.Security and Access-Control DirectivesDirectives of this kind affect the security of your site in one way or another.They set the UID and GUI the server runs as, control who has access to what resources, and implement access control and user-validation measures.The <Directory>, <Limit>, and <Location> sections allow you to group a series of settings on a directory or URL basis.Server I/O Configuration DirectivesThese directives control the IP and the port the server listens to for requests, as well as some other basic (and not-so-basic) things regarding the normal operation of the server.Server-Side Image Map DirectivesApache has a built-in module to handle server-side image maps.Traditionally, image maps have been implemented with CGI programs.Incorporating image map handling into the server core provides a significant enhancement in performance.This functionality is really a subcategory of the MIME, language management, or handler management directives, but its functionality is distinct enough to merit its own category.Proxy Server and Cache-Management DirectivesStarting with Apache 1.1, Apache is able to function as a caching proxy server.This allows the server to make transactions on behalf of a browser and store the results in a cache.Future requests to the same URL by a different user in the network are satisfied from the cache, reducing the load of the network.These directives control the cache management: how long files will be cached, and how big the cache can grow.SummaryThe next two chapters will explain with great detail all the directives available in Apache.When searching for a directive, you may want to reference the tables in this chapter because the next two chapters organize directives alphabetically and by module for ease of reference
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