The top of this diagram consists of an icon of a user.

Below this user icon, three boxes framed with a dashed line are arranged in a column. These boxes are named as follows:

• DMZ/Access Zone: This box contains a load balancer and two DMZ instances, which are linked together with a double-headed arrow and enclosed in a dotted line frame.

  The load balancer is positioned above the DMZ instances.

  A double-headed arrow links the load balancer and the two DMZ instances.

• Application/Service Zone: This box contains two Oracle Beehive instances, which are linked together with a double-headed arrow.

• Data Zone: This box contains three databases.

A double-headed arrow links the user icon and the load balancer. This arrow passes through a firewall.

A double-headed arrow links the frame enclosing the DMZ instances and the Application/Service Zone box. This arrow passes through a firewall.

A double-headed arrow links the Application/Service Zone box and the Data Zone box.