To access a DB2 server using TCP/IP, QMF for Windows must be able to establish a TCP/IP connection from the local host (the system on which QMF for Windows is running) to the remote port (the port on which DB2 is listening). QMF for Windows requires a WinSock 1.1 interface or later to the installed TCP protocol stack.
Because DB2 has been added to different platforms at different release points, check your DB2 database product documentation to see if its DRDA application server component supports TCP/IP.