And when it came time to develop a File Transfer Protocol, the same virtualizing or CIR trick was clearly just as useful as for a terminal oriented protocol, so virtualizing became part of the axiom set too.
– M.A. Padlipsky; A Perspective On The Arpanet Reference Model; RFC 871; September 1982.
The Internet is a large, complex place with many intertwined processes and data structures. This rich space gives rise to a range of tricks and techniques, some of which are described in the following sections: