A typical Siebel server deployment consists of Siebel clients (web, mobile, wireless, handheld), a Siebel web server, an Enterprise server (Enterprise server, Siebel servers and gateway servers), and Siebel database and file systems.

The Siebel web server processes web client requests. The Siebel Gateway server performs authentication and acts as the single entry point to access Siebel servers. The Siebel servers are the middle tier comprising several object manager components used to perform operations such as integration, workflow management, connectivity to Siebel databases, and account assignment. These Siebel servers support both multi-process and multi-threaded components.

The following image shows a typical Siebel Server deployment.