RFC 721 · HISTORIC · 1976 TUE · 15 SEP 2026

Out-of-Band Control Signals in a Host-to-Host Protocol

By L.L. Garlick · Published September 1976 · DOI 10.17487/RFC0721

Overview

RFC 721, “Out-of-Band Control Signals in a Host-to-Host Protocol”, is a Historic document published in September 1976 by L.L. Garlick. It has been obsoleted by RFC 7805 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.

What “Historic” means

A specification that has been superseded or is otherwise no longer recommended for use.

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Relationships to other RFCs
Obsoleted by
RFC 7805
Other RFCs from 1976