Configuring Citrix MetaFrame for Windows 2000 Terminal Services

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The final component in this process is the Web client. Citrix MetaFrame can use three clients:

■    A Netscape plug-in Client

■    A Microsoft ActiveX Client

■    A Java Client

The Netscape plug-in client, which works only with Netscape, requires manual installation before an application can be run.

The Microsoft ActiveX Client is distributed by diskette, though the diskette is not needed, as the ActiveX Client is usually automatically downloaded from a corporate server or Internet server when it is run for the first time. It works with Microsoft’s Internet Explorer, but it can also be used independently of Explorer.

The Java Client requires by far the most administrative overhead. However, if installed properly, it can provide an application that can operate on almost any Web-capable machine.

The Java Web Client that comes with Citrix MetaFrame operates in two different modes. The first mode, application mode, requires less administrative overhead and more end-user knowledge. When using the Java Web Client in application mode, the Java Web Client resides on the client machine that has an active Java Virtual Machine (JVM) version 1.1 or higher. This method of using Java allows the end user to initiate ICA connections from a command prompt and specify parameters to be used in the session. The session that is created in this mode is run from a window on a desktop and does not require a Web browser that supports Java.

The other mode that a Java connection creates is applet mode. This mode requires more administrative overhead, but puts less of a burden on end users and gives the administrator more control. When running in applet mode, the Java Web Client must be installed on the Web server where sessions are created. These Java ICA sessions will be initiated by the end user with a Java-compatible Web browser. When a session is created, the Java ICA Client is downloaded from the Web server and associated with ICA files. The client then uses the ICA files to create an ICA session with the Citrix Server. When using the Java Web Client in applet mode, the end user must have a Web browser that supports JVM 1.1 or higher.

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