Jane,
What is the difference between DB2 Client and DB2 Connect?
DB2 Client is free client for DB2 Linux, Unix, Windows (LUV).
DB2 Connect is chargeable client (can be also server), and (in addition
to LUV connectivity) includes OS/400 and/or z/OS connectivity/license.
So, you pay for only OS/400 or z/OS connectivity.
Our databases are DB2 8 on AIX and z/OS. Can we use DB2 Connect to
connect to DB2 server on AIX and DB2 on z/OS?
Yes, you can use DB2 Connect to access DB2 on AIX and z/OS. Next
question is: how would you like to connect the servers? Federation? Or,
just catalog z/OS database on AIX. Both are possible. Remember that
there are different connect editions (different pricing models).
-- Artur Wronski