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                                                          September 1981
Internet Protocol






















































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September 1981                                                          
                                                       Internet Protocol



                                PREFACE



This document specifies the DoD Standard Internet Protocol.  This
document is based on six earlier editions of the ARPA Internet Protocol
Specification, and the present text draws heavily from them.  There have
been many contributors to this work both in terms of concepts and in
terms of text.  This edition revises aspects of addressing, error
handling, option codes, and the security, precedence, compartments, and
handling restriction features of the internet protocol.

                                                           Jon Postel

                                                           Editor