RFC 857 · INTERNET STANDARD · 1983
MON · 15 JUN 2026
Telnet Echo Option
Overview
RFC 857, “Telnet Echo Option”, is an Internet Standard document published in May 1983 by J. Postel, J. Reynolds. The canonical text is published by the RFC Editor.
Abstract
This Telnet Option enables remote echoing by the other Telnet module. This RFC specifies a standard for the ARPA Internet community. Hosts on the ARPA Internet are expected to adopt and implement this standard. Obsoletes NIC 15390.
What “Internet Standard” means
A mature, widely-implemented specification that has completed the full IETF standards process — the highest maturity level on the standards track.
Read this RFC
The canonical text of RFC 857 is hosted at rfc-editor.org. Available in TXT,HTML.
Other RFCs from 1983