This graphic has on the left the label "Untrusted" bounded by a dotted line. It is connected by a line to a box labeled "Firewall," which is connected to another box labeled "Load Balancer," which points with three arrows to three pentagons.
The three pentagons are in a column labeled "WebLogic Server Cluster ('combined tier')." Each pentagon contains labels "HTTP,""JSP," "Servlet," "EJB," and "JDBC." Each of the pentagons points to a database.