The PeopleSoft Internet Architecture uses a web application server and an HTTP server. PeopleTools 8.12 and above include both BEA WebLogic and Apache with Jserv. With PeopleTools 8.4, both BEA WebLogic and IBM WebSphere are bundled. Apache with Jserv is no longer a supported web application server combination. Customers can choose which web application server to run during installation time. In a mixed PeopleTools 8.1x and 8.4 environment, each PeopleTools installation should have their own chain of web application server and application server, PeopleSoft Proprietary and Confidential Page 5and these can be on the same machine. For example, a PeopleTools 8.1xinstallation using Apache and Jserv could reside on the same machine as a PeopleTools 8.4 installation using IBM WebSphere. Care should be taken to ensure that unique port numbers are assigned to each server chain.?