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Chapter 3. HTML Optimization > How Modern Browsers Work with HTML

How Modern Browsers Work with HTML

Browsers interact with servers on the Internet using TCP/IP and HyperText Transfer Protocol (HTTP).[10] A browser issues a GET request with a page's URI, and an HTTP server responds with a “message” that contains HTML. This message is “a byte stream of ASCII characters.” Browsers download this stream of text as fast as possible. They don't download HTML files line by line; these are for human consumption and editing convenience.

[10] Roy T. Fielding et al., “Hypertext Transfer Protocol—HTTP/1.1,” RFC 2616 [online], (Reston, VA: The Internet Society, 1999), available from the Internet at http://www.ietf.org/rfc/rfc2616.txt.

Lines are “delimited by an optional carriage return followed by a mandatory line feed character. The client should not assume that the carriage return will be present. Lines may be of any length.[11]

[11] Tim Berners-Lee, “The Original HTTP as defined in 1991” [online], (Cambridge, MA: World Wide Web Consortium, 1991), available from the Internet at http://www.w3.org/Protocols/HTTP/AsImplemented.html.


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