The SAP DB Web tools are implemented as a Web service and can be used with the SAP DB Web Server as well as with current Web server Apache.
The Web services are installed together with the Web server on one computer. The database system can be on a different computer or on the same computer as the Web server. (See also Web Tools Installation Guide: SAP DB 7.4)
A connection to the client (Web DBM or Web SQL service integrated into the Web server) is created by calling an SAP DB Web Tool in the Web browser. The communication between the client and the database instance takes place, for the Web DBM tool, through the DBM Server and through the ODBC interface for the Web SQL Studio tool (Architecture of the Query Tools).