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ISA Server 2004 can be used to secure connections for clients accessing resources on the Internet. To enable this, you must configure all client connections to the Internet so that they pass through ISA Server. When you configure this option, ISA Server operates as a proxy server between the internal client and the Internet resource. When you configure internal clients to send all Internet requests through ISA Server, the client requests are sent to the proxy server component in ISA Server. ISA Server then sends the request to the Web server on the Internet. The Web server responds to the request and sends the reply back to the proxy server. The proxy server then forwards the reply back to the client that requested the information. Using a proxy server means that there is no direct connection between the internal client and the Web server. The client s internal network information is not sent across the Internet. In addition to providing a secure connection, ISA Server 2004 can also filter Internet requests based on information such as user name, client IP address, protocol, and request content. This means that you can restrict which users can access information on the Internet, which applications they can use to access that information, and what types of information the users can access. ISA Server can also operate as a caching server. The ISA Server cache is a store of frequently retrieved objects and URLs located on the cache drive of an ISA Server computer. Caching improves network performance because ISA Server can return information to a client from the cache rather than from the Internet. For example, when a user requests a page from a Web server that is not in the ISA Server cache, the ISA

Correct Answers: C A. Incorrect: Restoring Windows 98 system files over a Windows XP installation might return the system to its original state, or it might leave the system completely nonfunctional. Although it sometimes might be necessary to restore user data to a freshly upgraded system, applications and system settings cannot be transferred this way. B. Incorrect: This is a commonly used method that will work on many systems. However, it is very risky to not generate a compatibility report because there is a distinct possibility that the system will not function at all after the upgrade. Additionally, if you discover after the upgrade that a critical application cannot be patched to work properly with Windows XP, your only method of recovery is to perform a full system restore. It is more time-efficient to perform a Winnt32.exe / checkupgradeonly procedure and resolve any issues before running the full setup procedure.

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A predefined value that initiates an action if a counter either exceeds it or falls below it. Typically, a counter reaching a threshold value triggers an alert. Logged with an event description to specify when the event occurred. Temporarily sets specific server characteristics or switches off a particular behavior. Trace flags are used to diagnose performance issues or to debug stored procedures.

Upgrade from a Previous Version of Windows XP to Windows XP Professional 21-33

Server computer retrieves the object from the Web and then retains a copy in its cache before delivering the object to the user. The benefit of caching is that when a second user requests the same Web page, ISA Server returns the object from its cache, saving time and eliminating additional Internet traffic.

C. Correct: This method is the correct choice because it proactively identifies system incompatibilities. Generating a compatibility report before performing the upgrade greatly improves the chance of a successful upgrade. If a system component or application is completely incompatible with Windows XP, this method identifies that weakness ahead of time. D. Incorrect: Performing a new install of Windows XP preserves the user s data, but not applications and system settings. Although applications are not available from the Start menu, the application files still consume hard disk space. Applications need to be reinstalled, and system settings are completely lost.

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