used in the DARPA Internet.  For each protocol a single line should be
     present with the following information:

           official protocol name
           protocol number
           aliases

     Items are separated by any number of blanks and/or tab characters.  A
     ``#'' indicates the beginning of a comment; characters up to the end of
     the line are not interpreted by routines which search the file.

     Protocol names may contain any printable character other than a field
     delimiter, newline, or comment character.

FILES

     /etc/protocols  The protocols file resides in /etc.

SEE ALSO

     getprotoent(3)

BUGS

     A name server should be used instead of a static file.

HISTORY

     The protocols file format appeared in 4.2BSD.

4.2 Berkeley Distribution        June 5, 1993        4.2 Berkeley Distribution