The default name to use in forming a connection
when no other name is specified. Corresponds
directly to PORT DEDICATED/PREFERRED SERVICE and the
value labeled 'Dedicated/Preferred Service:' in the
PORT CHARACTERISTICS display. If the value of
basicPortDefaultDestProtocol is 'telnet', an
Internet port number may be included on the end of
the name, delimited with a colon (':'). If the
value of basicPortDefaultDestProtocol is not
'telnet', then the maximum length is 16.