Web and technology
RFC
Abbreviation for Request for Comments
In short and in plain language
An RFC is a technical text about how the internet works.
It sets out the rules and steps used on the net.
Much of how websites and email work is based on such texts.
Each text has a number. People cite it by that number.
Definition
An RFC is a technical document of internet standardisation that describes protocols and procedures of the internet. Many processes around websites and email are based on such descriptions. They are cited by their number.