ultrix man page for protocols

protocols(5)							File Formats Manual						      protocols(5)

Name
       protocols - protocol name file

Description
       The  file is an ASCII file that contains information regarding the known protocols used in the DARPA Internet.  For each protocol, a single
       line should be present with the following information:

       Official protocol name
       Protocol number
       Aliases

       Each name is separated from the next by a new line.  Items are separated by any number of blanks or tab characters or both.  A number  sign
       (#) indicates the beginning of a comment; characters up to the end of the line are not interpreted by routines that search the file.

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

       The  database  may be distributed in a network by a naming service, such as Yellow Pages or BIND/Hesiod.  See the Guide to the Yellow Pages
       Services or the chapter on Hesiod in the Guide to the BIND/Hesiod Service for setup information.

Files
See Also
       getprotoent(3n)
       Guide to the BIND/Hesiod Service
       Guide to the Yellow Pages Service

																      protocols(5)