Figure 4-3
This illustration depicts stack communication layers used by JDBC drivers. The JDBC OCI driver stack, from the top down, is constructed with the following layers:

• Java Client Application
• JDBC OCI Driver (uses OCI)
• Presentation - TTC
• Oracle Net Foundation Layer
• Oracle Protocol Support (TCP/IP, TCP/IP with SSL,and Named Pipes)
• Network Protocol

The JDBC Thin driver stack, from the top down, is constructed with the following layers:

• Java Applet / Application
• JDBC Thin Driver
• Presentation - JavaTTC
• JavaNet
• TCP/IP Network Protocol