 <p>Try <a href="http://www.garshol.priv.no/download/text/http-tut.html#sresp" rel="nofollow">this</a></p> <p>Or <a href="http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol" rel="nofollow">this</a></p> <p>You could also try to use google.com for some searching on the net by the way.</p>