Reading the RFCs for popular protocols is also a good start. Several of the RFCs also document many years of learning from operating networks. A good place to s

Reading the RFCs for popular protocols is also a good start. Several of the RFCs also document many years of learning from operating networks. A good place to start is the RFC index - http://www.rfc-editor.org/rfc-index2.html http://www.rfc-editor.org/rfc-index2.html (eg HTTP/1.1 is RFC 2616)