RFCs are produced by the IETF and cover many aspects of computer networking. They describe the Internet's technical foundations, such as addressing, routing, and transport technologies. RFCs also specify protocols like TCP, IP, etc. that are used to deliver services used by billions of people every day, such as real-time collaboration, email, and the domain name system. Only some RFCs are standards. Depending on their maturity level and what they cover, RFCs are labeled with different statuses: Internet Standard, Proposed Standard, Best Current Practice, Experimental, Informational, and Historic.
