January 1981

• RFC776: Assigned numbers.
• RFC782: Virtual Terminal management model.
• RFC804: CCITT draft recommendation T.4. International Telegraph and Telephone Consultative Committee of the International Telecommunication Union.

February 1981

No RFCs published

March 1981

No RFCs published

April 1981

• RFC777: Internet Control Message Protocol.
• RFC778: DCNET Internet Clock Service.
• RFC779: Telnet send-location option.

May 1981

• RFC780: Mail Transfer Protocol.
• RFC781: Specification of the Internet Protocol (IP) timestamp option.

June 1981

• RFC783: TFTP Protocol (revision 2).

July 1981

• RFC784: Mail Transfer Protocol: ISI TOPS20 implementation.
• RFC785: Mail Transfer Protocol: ISI TOPS20 file definitions.
• RFC786: Mail Transfer Protocol: ISI TOPS20 MTP-NIMAIL interface.
• RFC787: Connectionless data transmission survey/tutorial.
• RFC789: Vulnerabilities of network control protocols: An example.

August 1981

No RFCs published

September 1981

• RFC790: Assigned numbers.
• RFC791: Internet Protocol.
• RFC792: Internet Control Message Protocol.
• RFC793: Transmission Control Protocol.
• RFC794: Pre-emption.
• RFC795: Service mappings.
• RFC796: Address mappings.
• RFC797: Format for Bitmap files.
• RFC798: Decoding facsimile data from the Rapicom 450.
• RFC799: Internet name domains.
• RFC806: Proposed Federal Information Processing Standard: Specification for message format for computer based message systems. National Bureau of Standards.

October 1981

No RFCs published

November 1981

• RFC788: Simple Mail Transfer Protocol.
• RFC801: NCP/TCP transition plan.
• RFC802: ARPANET 1822L Host Access Protocol.
• RFC803: Dacom 450/500 facsimile data transcoding.