RFC 1145 · HISTORIC · 1990
MON · 27 JUL 2026
TCP alternate checksum options
Overview
RFC 1145, “TCP alternate checksum options”, is a Historic document published in February 1990 by J. Zweig, C. Partridge. It has been obsoleted by RFC 1146, RFC 6247 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
This memo is suggests a pair of TCP options to allow use of alternate data checksum algorithms in the TCP header. The use of these options is experimental, and not recommended for production use.
What “Historic” means
A specification that has been superseded or is otherwise no longer recommended for use.
Read this RFC
The canonical text of RFC 1145 is hosted at rfc-editor.org. Available in TXT,HTML.
Relationships to other RFCs
Other RFCs from 1990
- RFC 1144 Compressing TCP/IP Headers for Low-Speed Serial Links
- RFC 1146 TCP alternate checksum options
- RFC 1143 The Q Method of Implementing TELNET Option Negotiation
- RFC 1147 FYI on a Network Management Tool Catalog: Tools for Monitoring and Debugging TCP/IP Internets and Interconnected Devices
- RFC 1142 OSI IS-IS Intra-domain Routing Protocol
- RFC 1148 Mapping between X.400 / ISO 10021 and RFC 822
- RFC 1141 Incremental updating of the Internet checksum
- RFC 1149 Standard for the transmission of IP datagrams on avian carriers