Client applications connected to multiple AppServers
A client application can connect to multiple AppServers on the same, or on different, machines. Figure 3–6 shows how this configuration might look with a client application connected to three different AppServers running (respectively) on one UNIX and two Windows machines.
In this scenario, the UNIX AppServer accesses a local database. Each Windows AppServer accesses the same remote database server (or DataServer) running on UNIX, which thus implements a three-tier distribution of application resources.