A Request for Comments is a formal document from the IETF (Internet Engineering Task Force) which provides the standard for a particular protocol or technology. It is the result of committee drafting and subsequent review by interested parties. RFC may be informational in nature. Some RFC may be intended to become Internet standards, then the final version of the RFC becomes the standard and no further comments are permitted. Changes can still occur through subsequent RFC that supersede or build on all or parts of previous RFC.