RFC 1925 - The Twelve Networking Truths
tools.ietf.org/html/rfc1925
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
[Docs] [txt|pdf] [Errata] INFORMATIONAL Errata Exist Network Working Group R. Callon, Editor Request for Comments: 1925 IOOF Category: Informational 1 April 1996