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Practical Packet Analysis, 2nd Edition by Chris Sanders

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Hypertext Transfer Protocol

The Hypertext Transfer Protocol (HTTP) is the delivery mechanism of the World Wide Web, allowing web browsers to connect to web servers to view web pages. In most organizations, HTTP represents, by far, the highest percentage of traffic seen going across the wire. Every time you do a Google search, connect to Twitter to send a tweet, or check University of Kentucky basketball scores on ESPN.com, you’re using HTTP.

We won’t look at the packet structures for an HTTP transfer. Because the contents of those packets vary widely depending on their purpose, that exercise is left to you. Here, we’ll look at some practical applications of HTTP.

Browsing with HTTP

http_google.pcap

HTTP is most commonly used to browse web pages on ...

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