This parameter indicates the communication protocols that the client applications on this instance can use for remote connections. Its content is a character string, made up of one or more tokens. If you are specifying more than one token, separate them with a comma. The order of the tokens is significant in terms of preference.
This parameter can only be used with DCE, and applies to OS/2 and UNIX-based environments only.
You can temporarily override the value of this parameter by setting the DB2CLIENTCOMM environment variable.
If the value of this parameter is NULL and the environment variable has not been set, the first protocol specified in the server's global directory object is used.
This parameter is ignored if dir_type is set to NONE.
Recommendation: The protocol that is used most often should be specified first.