RFC 1143 · EXPERIMENTAL · 1990
WED · 29 JUL 2026
The Q Method of Implementing TELNET Option Negotiation
Overview
RFC 1143, “The Q Method of Implementing TELNET Option Negotiation”, is an Experimental document published in February 1990 by D.J. Bernstein. The canonical text is published by the RFC Editor.
Abstract
This is RFC discusses an implementation approach to option negotiation in the Telnet protocol (RFC 854). It does not propose any changes to the TELNET protocol. Rather, it discusses the implementation of the protocol of one feature, only. This is not a protocol specification. This is an experimental method of implementing a protocol.
What “Experimental” means
Describes a specification that is part of a research or development effort, published so the community can gain experience with it.
Read this RFC
The canonical text of RFC 1143 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1990
- RFC 1142 OSI IS-IS Intra-domain Routing Protocol
- RFC 1144 Compressing TCP/IP Headers for Low-Speed Serial Links
- RFC 1141 Incremental updating of the Internet checksum
- RFC 1145 TCP alternate checksum options
- RFC 1140 IAB official protocol standards
- RFC 1146 TCP alternate checksum options
- RFC 1139 Echo function for ISO 8473
- RFC 1147 FYI on a Network Management Tool Catalog: Tools for Monitoring and Debugging TCP/IP Internets and Interconnected Devices