Configurations

• App server need not be its own machine(s)

  • Modules integrated into a Web server (Microsoft)
  • Modules integrated into a DBMS (Oracle)
  • Tougher to mix ɭ database and ɭ Web server

• Many modern sites using a new physical tier

  • Java: Servlets, JSP, Enterprise Java Beans
  • App servers from WebLogic, IBM, Netscape, ATG

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