This graphic has on the left the label "Untrusted Clients" bounded by a dotted line. It is connected to "Firewall" by a line which is further connected to "Load Balancer". Th e Load Balancer points to three boxes in "WebLogic Server Cluster ('combined tier')" with arrows.

Each box contains labels "HTTP", "JSP", "Servlet", "EJB", and "JDBC". Each of the boxes points to a Database.