A directory of the Internet Engineering Task Force groups and their web pages.

Independent public forum supporting patent-free protocols. Includes policies, papers, a mission statement, and a list of free protocols.

Independent organization managing the eXtensible Name Service, an open protocol and open-source platform for universal addressing, automated data exchange, and privacy control. Includes an overview, charter, history, and specifications.

List of documents organized by alphabetized subjects.

Overview of Internet protocols.

General comments on protocol design, and good reference material on a few protocols (especially mail-related; also ftp, time, and misc) by Dan Bernstein.

A consortium led by universities working in partnership with industry and government to develop and deploy advanced network applications and technologies, accelerating the creation of tomorrow's Internet.

Well known port numbers for TCP and UDP, from Internet Assigned Numbers Authority (IANA).

Collates Request For Comments documents. Explains the RFC process, and includes a searchable database of RFCs.

Description of protocols, file formats, glossary of terms, RFCs.