This graphic shows Oracle SES in the top left corner. To the right, with arrows back and forth to Oracle SES, is Oracle Internet Directory. Underneath that, with arrows back and forth to Oracle Internet Directory, is the ingle Sign-On Server (HTTP). To the left of the SSO Server (and underneath Oracle SES) is Oracle HTTP Server, with arrows back and forth to the SSO Server. This also has arrows pointing back and forth back up to Oracle SES. Also, to the left of the diagram is an HTTP clint connecting through HTTP or HTTPS to the Oracle HTTP Server.