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The very fact that they use different roots automatically segregates the names and the two DNS services that would be used to support them The only thing that needs to transit through the firewall is standard name references you would normally use for any name that is not located within your network In addition, it is very easy for Contoso to buy and maintain all the possible combinations of its Internet name, including common roots such as com, net, info, ms, ws, and more This way, Contoso knows it can use any of the names it owns for any forest implementation, production, testing, development, or staging or for whichever purpose it needs it and never conflict with anyone else even if it faces a merger or an acquisition Issues that commonly arise around this topic are often based on the ownership of the DNS service.

You almost always access System Recovery Options by booting off the Windows Vista installation media. Sometimes vendors install the System Recovery tools on a separate partition, but performing such an operation is beyond the scope of the 70-620 exam. Rather than selecting Install Vista after the language selection dialog box, you click Repair Your Computer, and then select the installation of Windows Vista you want to repair. If the computer you are attempting to repair requires specialized drivers to access the hard disk drive, it is possible to load the device driver software during this step. After you have selected the installation that you will repair, you are presented with the menu shown in Figure 2-15. Each of the tools in the System Recovery Options menu is covered in the following paragraphs.

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Review the chapter summary. Review the list of key terms introduced in this chapter. Complete the case scenarios. These scenarios set up real-world situations involving the topics of this chapter and ask you to create a solution. Complete the suggested practices. Take a practice test.

You must configure a new access rule that meets the new office requirements. By default, ISA Server will not allow any network traffic from the new network to the Internet until you configure an access rule.

Traditionally, network operators own previous DNS services and, very often, these DNS services are maintained in environments that are not Microsoft Windows based However, Windows and, especially, AD DS are designed to rely very tightly on the Windows DNS service Although it is possible to use Windows with non-Windows DNS servers, it is not recommended because it requires so much more work When you use the Windows DNS service and integrate it with your AD DS service, everything becomes automatic When you don t, everything remains manual and, very often, you ll find that specific components don t work because the manual configuration was not completed or was misconfigured by non-Windows system administrators..

Figure 6-6

Believe it or not, some people don't like Windows Messenger, and they tire of the program's constant nags to sign up for a Passport. Windows XP doesn't provide a user interface to remove Windows Messenger permanently (see 15, "Working Around IT Problems," for a simple way to uninstall it, though), but you can keep it from running. In Windows Messenger, click Tools, Options. On the Preferences tab of the Options dialog box, clear the Run This Program When Windows Starts check box. The problem with this setting is that the program still runs when other programs start. Clearing this check box removes the command that starts Windows Messenger from the key HKCU\Software\Microsoft\Windows\CurrentVersion\Run. The most ironclad solution is to set the policy that prevents Windows Messenger from ever running. You can set this policy using Group Policy editor to edit the local Group Policy Object (see 6, "Using Registry Based Policy"), or you can set the policy directly. To do that, create the REG_DWORD value PreventRun in HKLM\SOFTWARE\Policies\Microsoft\Messenger\Client and set it to 0x01. This setting affects all users who log on to the computer. When they try running Windows Messenger, they don't see an error message. It just doesn't run.