RFC 860 · INTERNET STANDARD · 1983
MON · 15 JUN 2026
Telnet Timing Mark Option
Overview
RFC 860, “Telnet Timing Mark 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 provides a way to check the roundtrip path between two Telnet modules. 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 16238.
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 860 is hosted at rfc-editor.org. Available in TXT,HTML.
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