This figure illustrates how the OC4J Plug-in routes requests directly from a third party listener to OC4J. It shows HTTP(S) requests originating from the client, and being directed to the third party listener, such as IIS or Sun ONE Web Server. The OC4J Plug-in directs the information from the third party listener to OC4J through the AJP 1.3 protocol, and/or OPMN through ONS. OPMN and OC4J comminucate through ONS.