DB2 Connect allows you to access data stored on mainframe and midrange databases from Windows and UNIX-based operating systems. You can connect to DB2 databases on mainframe and midrange systems such as OS/390 or z/OS, iSeries, VSE, VM, and MVS, as well as non-IBM databases that comply with the Distributed Relational Database Architecture (DRDA).
DB2 Connect Enterprise Edition provides access for an entire network. It is designed for a three-tier environment, where clients connect to mainframe and midrange databases through a DB2 Connect server.