http://www.rfc-editor.org/rfc/rfc3617.txt
RFC 3617: Uniform Resource Identifier (URI) Scheme and Applicability Statement for the Trivial File Transfer Protocol (TFTP), E. Lear2003-10-01T23:00:00-00:00The Trivial File Transfer Protocol (TFTP) is a very simple TRIVIAL protocol that has been in use on the Internet for quite a long time. While this document discourages its continued use, largely due to security concerns, we do define a Uniform Resource Identifier (URI) scheme, as well as discuss the protocol's applicability.