RFC (Request for Comments)  The Request For Comments (RFC) are a
collection of documents about various topics of the Internet,
containing protocol specifications and alike.  It is important
to understand that not all RFC documents are protocol
specifications; the main categories are: Informational, Proposed
Standard, Draft Standard, Standard, Experimental, Best Current
Practice and For Your Information. RFC documents may also extend
or update a given other RFC document, or make it obsolete. There
are even April 1st jokes, which can easily be recognized by the
date of publication and the often odd title and abstract.  You
will find all RFC documents at the Internet Engineering Task
Force (IETF) RFC repository. An useful address is The RFC Editor
where you can search for specific keywords in order to find
relevant RFC documents (and even Internet Drafts, which are
drafted potential RFC documents).  RFC's are typically
referenced by their number, so you might see something like "the
TCP RFC 793" or only "RFC 793