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PROTOCOLS(5) Linux Programmer's Manual PROTOCOLS(5)


     protocols - protocols definition file


     This  file is a plain ASCII file, describing the various DARPA internet
     protocols that are available from the TCP/IP subsystem.  It  should  be
     consulted  instead  of using the numbers in the ARPA include files, or,
     even worse, just guessing them.  These numbers will occur in the proto-
     col field of any IP header.
     Keep  this  file  untouched  since changes would result in incorrect IP
     packages.  Protocol numbers and names are specified by the IANA (Inter-
     net Assigned Numbers Authority).
     Each line is of the following format:
            protocol number aliases ...
     where  the  fields  are  delimited  by spaces or tabs.  Empty lines are
     ignored.  If a line contains a hash mark (#), the  hash  mark  and  the
     part of the line following it are ignored.
     The field descriptions are:
            the  native name for the protocol.  For example ip, tcp, or udp.
     number the official number for this protocol as it will  appear  within
            the IP header.
            optional aliases for the protocol.
     This file might be distributed over a network using a network-wide nam-
     ing service like Yellow Pages/NIS or BIND/Hesiod.


            The protocols definition file.




     This page is part of release 4.16 of the Linux  man-pages  project.   A
     description  of  the project, information about reporting bugs, and the
     latest    version    of    this    page,    can     be     found     at

Linux 2012-08-05 PROTOCOLS(5)

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