The Internet Engineering Task Force (IETF) working groups publish standards documents that are known as Requests for Comments (RFCs). Standards that are under development are published in Internet Drafts. The Internet Architecture Board (IAB) must approve all RFCs before they are placed in the public domain. Typically RFCs and Internet drafts are directed to developers and other highly technical readers. However, a number of RFCs that deal with TCP/IP topics contain valuable information for system administrators. These RFCs are cited in various places throughout this book.
Generally, For Your Information (FYI) documents appear as a subset of the RFCs. FYIs contain information that does not deal with Internet standards. FYIs contain Internet information of a more general nature. For example, FYI documents include a bibliography that list introductory TCP/IP books and papers. FYI documents provide an exhaustive compendium of Internet-related software tools. Finally, FYI documents include a glossary of Internet and general networking terms.