db2 connection

[kennyapril]

Earlier I used Db2/UDB API stage for connecting the DB2 but that seems to be more confusing and I came to know through the forums that DB2 enterprise is quite easy compared to API.

I gave server name,username,password for API.
can any one suggest me how to use DB2 enterprise.
In the output tab I have connection properties.

what should be given in the place of client instance name?
default database when its false as no default value is given?
default server when its false as no default value is given?

Thanks,