HTTP

HTTP Made Really Easy

http://www.jmarshall.com/easy/http/

Key Differences between HTTP/1.0 and HTTP/1.1

http://www8.org/w8-papers/5c-protocols/key/key.html

HTTP/1.1 Methods

http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html

List of HTTP status codes

http://en.wikipedia.org/wiki/List_of_HTTP_status_codes

Chunked transfer encoding

http://en.wikipedia.org/wiki/Chunked_transfer_encoding

HTTP entity tag (ETag) and caching

http://www.w3.org/2005/MWI/BPWG/techs/CachingWithETag.html

http://en.wikipedia.org/wiki/HTTP_ETag