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Microsoft MCITP Test Prep - Windows Server 2008

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You administer an Active Directory domain in which all servers are Microsoft Windows Server 2008, and all the clients are Microsoft Windows XP Professional. You have configured DHCP to update DNS only if the DHCP client requests. You find that the clients’ A resource records are not updated in DNS when they obtain new DHCP leases. Which of the following is the most likely cause of this problem?
  1. DNS is not integrated with the Active Directory.
  2. DHCP server is not authorized in Active Directory.
  3. The DHCP server’s computer account is not a member of the DNSUpdateProxy global security group.
  4. Clients are not configured to update their own host A resource records.
Explanation
Answer - C - The DHCP server’s computer account is not a member of the DNSUpdateProxy global security group.

Key Takeaway: In this case, the clients cannot perform this task because the DHCP server owns the A records. You should add the DHCP server to the DNSUpdateProxy group. Members of this group can update resource records but do not own them. In addition to adding the server to DNSUpdateProxy group, you should manually delete the clients’ host records and then either reboot the clients or use the Ipconfig /registerdns command-line utility on each client.
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