RFC 1241 (rfc1241) - Page 1 of 17

Scheme for an internet encapsulation protocol: Version 1

Network Working Group                                       R. Woodburn
Request for Comments: 1241                                         SAIC
                                                               D. Mills
                                                 University of Delaware
                                                              July 1991


            A Scheme for an Internet Encapsulation Protocol:
                               Version 1

1. Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  Discussion and suggestions for improvement are requested.
   Please refer to the current edition of the "IAB Official Protocol
   Standards" for the standardization state and status of this protocol.
   Distribution of this memo is unlimited.

2. Glossary

   Clear Datagram -
     The unmodified IP datagram in the User Space before
     Encapsulation.

   Clear Header -
     The header portion of the Clear Datagram before
     Encapsulation.  This header includes the IP header and
     possibly part or all of the next layer protocol header,
     i.e., the TCP header.

   Decapsulation -
     The stripping of the Encapsulation Header and forwarding
     of the Clear Datagram by the Decapsulator.

   Decapsulator -
     The entity responsible for receiving an Encapsulated
     Datagram, decapsulating it, and delivering it to the
     destination User Space.  Delivery may be direct, or via
     Encapsulation.  A Decapsulator may be a host or a gateway.

   Encapsulated Datagram -
     The datagram consisting of a Clear Datagram prepended with
     an Encapsulation Header.

   Encapsulation -
     The process of mapping a Clear Datagram to the
     Encapsulation Space, prepending an Encapsulation Header to
     the Clear Datagram and routing the Encapsulated Datagram



Woodburn & Mills