Installing and Configuring Active Directory

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You are troubleshooting connectivity problems reported by the network administrator for the 70-270 practice test Research department, which has two Windows Server 2003 computers and 100 Windows XP Professional client computers. One of the administrators for Research reports that he sees DNS registration errors in the Event Viewer and also sees errors when he runs the Netdiag utility. In this section, you'll troubleshoot this problem using the DNS console and the Netdiag utility. To make this lab more realistic, you'll actually create a problem by deleting the PDC emulator DNS record. You'll learn the significance of the PDC emulator in Chapter 4. To delete the PDC emulator DNS record, perform the following steps: 1.On Serverl, log on as Administrator to the contoso.com domain. 2.Open the DNS console. (You can do this in one of two ways: Click Start, select Administrative Tools, and then click DNS; or Click Start, then Run, and type dnsmgmt.msc in the Open dialog box. Click OK.) 3.Expand the SERVER1 object. Expand the following objects: Forward lookup Zones, _msdcs.contoso.com, pdc, and then the tcp object. 4.Select the _ldap record in the right-hand pane. Right click the record and then select Delete. Click Yes to confirm the deletion. 5.Right-click _msdcs.contoso.com object and click Properties on the resulting context menu. You'll see the __msdcs.contoso.com Properties dialog box General tab appear. 6.Change the Dynamic Updates option box to read None. 7.Click OK. 8.Close the DNS console. 9.Restart Serverl. At this point you've purposely created a free 70-270 test questions connectivity issue and deleted a significant DNS record. Typically, an administrator wouldn't purposely cause such a problem. However, DNS problems due to mistakes, lack of administrator knowledge, and network connectivity issues are quite common. For example, changing the domain membership of a domain controller could potentially result in a DNS configuration error as documented in Microsoft Knowledge Base Article 311354: "Event 5781 Occurs After DC Changes Domain." Create multiple domains to meet security requirements, meet administrative requirements, optimize replication traffic, or retain Windows NT domains. Although the recommended number of trees in a forest is one, you might need to define more than one tree if your organization has more than one DNS name. Adding a domain or tree increases administrative and hardware costs. The recommended number of forests is one. Consider creating multiple forests if you need to secure data or you need to isolate directory replication. Adding a forest dramatically increases administrative and usability costs and can directly affect users during the logon free practice tests and query processes.