Some of the protocols listed in this memo are described in RFCs that are obsoleted by newer RFCs. "Obsolete" or "obsoleted" is not an official state or status of protocols. This subsection is for information only.
While it may seem to be obviously wrong to have an obsoleted RFC in the list of standards, there may be cases when an older standard is in the process of being replaced. This process may take a year or two.
For example, the Network Time Protocol (NTP) [RFC 1119] is in its version 2 a full Standard, and in its version 3 is a Draft Standard [RFC 1305]. Once version 3 is a full Standard, version 2 will be made Historic.
Many obsoleted protocols are of little interest and are dropped from this memo altogether. Some obsoleted protocols have received enough recognition that it seems appropriate to list them under their current status and with the following reference to their current replacement.
RFC RFC Status Title * ==== ==== ========= =================================== = 1661 obsoletes 1548 Draft /Ele The Point to Point Protocol (PPP) 1305 obsoletes 1119 Std /Rec Network Time Protocol (Version 2) 1533 obsoletes 1497 Draft/Rec Bootstrap Protocol 1574 obsoletes 1139 Prop /Ele Echo for ISO-8473 1573 obsoletes 1229 Prop /Ele Extensions to the Generic-IF MIB 1559 obsoletes 1289 Prop /Ele DECNET MIB 1541 obsoletes 1531 Prop /Ele Dynamic Host Configuration Protocol 1592 obsoletes 1228 Exper/Lim SNMP Distributed Program Interface 1528 obsoletes 1486 Exper/Lim An Experiment in Remote Printing 1320 obsoletes 1186 Info / MD4 Message Digest Algorithm 1057 obsoletes 1050 Hist /Not Remote Procedure Call Version 1 1421 obsoletes 1113 Hist /Not Mail Privacy: Procedures 1422 obsoletes 1114 Hist /Not Mail Privacy: Key Management 1423 obsoletes 1115 Hist /Not Mail Privacy: Algorithms 1267 obsoletes 1163 Hist /Not Border Gateway Protocol 1268 obsoletes 1164 Hist /Not Border Gateway Protocol
Thanks to Lynn Wheeler of Britton Lee for compiling the information in this subsection.
[Note: an asterisk at the end of a line indicates a change from the previous edition of this document.]