Figure 1-13
This illustration depicts a Web browser connection to an Oracle database through an application Web server.

The application Web server shows a communication stack. From the top down, the stack is constructed with the following layers:

Application
Oracle Net Foundation Layer
Oracle VI Support

The database server shows a communication stack that includes two layers. From the top down, the stack is constructed with the following layers:

RDBMS
Oracle Net Foundation Layer
Oracle VI Support

The HTTP protocol resides between the Web browser and the application Web server, and the VI network protocol resides between the application Web server and the database server.