| RFC | Status | Reference | Notes |
|---|---|---|---|
| 1108 | Historic | S. Kent (November 1991). U.S. Department of Defense - Security Options for the Internet Protocol. Network Working Group. doi:10.17487/RFC1108. RFC 1108. | Obsoletes RFC 1038. |
| 1112 | Internet Standard 5 | S. Deering (August 1989). Host Extensions for IP Multicasting. Network Working Group. doi:10.17487/RFC1112. STD 5. RFC 1112. | Obsoletes RFC 988 and 1054. Updated by RFC 2236. |
| 1119 | Obsolete | D. Mills (September 1989). Network Time Protocol (Version 2) Specification and Implementation. Network Working Group. doi:10.17487/RFC1119. RFC 1119. | Obsoleted by RFC 1305. Obsoletes RFC 958 and 1059. |
| 1122 | Internet Standard 3 | R. Braden, ed. (October 1989). Requirements for Internet Hosts -- Communication Layers. Network Working Group. doi:10.17487/RFC1122. STD 3. RFC 1122. | Updated by RFC 1349, 4379, 5884, 6093, 6298, 6633, 6864, 8029 and 9293. |
| 1123 | Internet Standard 3 | R. Braden, ed. (October 1989). Requirements for Internet Hosts -- Application and Support. Network Working Group. doi:10.17487/RFC1123. STD 3. RFC 1123. | Updated by RFC 1349, 2181, 5321, 5966 and 7766. |
| 1127 | Informational | R. Braden (October 1989). A Perspective on the Host Requirements RFCs. Network Working Group. doi:10.17487/RFC1127. RFC 1127. | |
| 1141 | Informational | T. Mallory; A. Kullberg (January 1990). Incremental Updating of the Internet Checksum. Network Working Group. doi:10.17487/RFC1141. RFC 1141. | Obsoletes RFC 1071. Updated by RFC 1624. |
| 1144 | Proposed Standard | V. Jacobson (February 1990). Compressing TCP/IP Headers for Low-Speed Serial Links. Network Working Group. doi:10.17487/RFC1144. RFC 1144. | |
| 1149 | Experimental | D. Waitzman (1 April 1990). A Standard for the Transmission of IP Datagrams on Avian Carriers. Network Working Group. doi:10.17487/RFC1149. RFC 1149. | This is an April Fools' Day Request for Comments. |
| 1191 | Draft Standard | J. Mogul; S. Deering (November 1990). Path MTU Discovery. Network Working Group. doi:10.17487/RFC1191. RFC 1191. | Obsoletes RFC 1063. |
