This figure shows an example Oracle Fusion Middleware enterprise deployment architecture, composed of four tiers separated by firewalls. The client tier includes external users and mobile/wireless devices. Web Tier DMZ contains a network dispatcher LBR and two active/active clusters containing the Oracle HTTP Server and Oracle WebCache. The App Tier DMZ has an active/active cluster containing the admin server and two managed servers. The Data Tier/Intranet holds the directory server and database servers.

A marked path indicates that requests passes from the client tier, through the network dispatcher LBR into the Web Tieer, into the app tier, and stops at the data tier.