RFC 1166 (rfc1166) - Page 2 of 182

Internet numbers

RFC 1166                    Internet Numbers                   July 1990


   Most of the protocols used in the Internet are documented in the RFC
   series of notes.  Some of the items listed are undocumented.  Further
   information on protocols can be found in the memo published by the
   Internet Activites Board (IAB), "IAB Official Protocol Standards"
   [52], which describes the state of standardization of protocols used
   in the Internet.  This document is issued quarterly.  Current copies
   may be obtained from the DDN Network Information Center.

   The lists below contain the name and network mailbox of the
   individuals responsible for each registered network or autonomous
   system.  The bracketed entry, e.g. [nn,iii], at the right hand margin
   of the page indicates a reference for the listed network or
   autonomous system, where the number ("nn") cites the document and the
   letters ("iii") cite the NIC Handle of the responsible person.  The
   NIC Handle is a unique identifier that is used in the NIC
   WHOIS/NICNAME service.  People occasionally change electronic
   mailboxes.  To find out the current network mailbox or phone number
   for an individual, or to get information about a registered network,
   use the NIC WHOIS/NICNAME service or contact .

   The convention used for the documentation of Internet Protocols is to
   express numbers in decimal and to picture data in "big-endian" order
   [39].  That is, fields are described left to right, with the most
   significant octet on the left and the least significant octet on the
   right.

   The order of transmission of the header and data described in this
   document is resolved to the octet level.  Whenever a diagram shows a
   group of octets, the order of transmission of those octets is the
   normal order in which they are read in English.  For example, in the
   following diagram the octets are transmitted in the order they are
   numbered.

       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |       1       |       2       |       3       |       4       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |       5       |       6       |       7       |       8       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |       9       |      10       |      11       |      12       |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                           Transmission Order of Bytes


   Whenever an octet represents a numeric quantity the left most bit in
   the diagram is the high order or most significant bit.  That is, the



Kirkpatrick, Stahl & Recker