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This chapter contains just an overview of HTTP and focuses only on the aspects that affect performance. To learn more, read the HTTP specification (http://www.w3.org/protocols/rfc2616/rfc2616.html) and HTTP: The Definitive Guide by David Gourley and Brian Totty (O'Reilly; http://www.oreilly.com/catalog/httptdg). The parts highlighted here are sufficient for understanding the best practices described in the following chapters.

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