You are the systems engineer for Contoso, Ltd. The internal network consists of a Windows NT 4.0 domain. The company maintains a separate network that contains publicly accessible Web and mail servers. These Web and mail servers are members of a DNS domain named contoso.com. The contoso.com zone is hosted by a UNIX-based DNS server running BIND 4.8.1. Contoso, Ltd., is planning to migrate to a Windows Server 2003 Active Directory domain-based network. The migration plan states that all client computers will be upgraded to Windows XP Professional and that all servers will be replaced with new computers running Windows Server 2003.
The migration plan specifies the following requirements for DNS in the new environment:
Active Directory data must not be accessible from the Internet. The DNS namespace must be contiguous to minimize confusion for users and administrators. Users must be able to connect to resources in the contoso.com domain. Users must be able to connect to resources located on the Internet.
The existing UNIX-based DNS server will continue to host the contoso.com domain. The existing UNIX-based DNS server cannot be upgraded or replaced.
You plan to install a Windows Server 2003 DNS server on the internal network. You need to configure this Windows-based DNS server to meet the requirements specified in the migration plan.
What should you do?
A.
Create a primary zone named ad.contoso.com on the UNIX-based DNS server. Create a secondary zone on your Windows-based DNS server for the ad.contoso.com domain.
B.
Create a primary zone named ad.contoso.com on your Windows-based DNS server. Create a delegation record for the new zone on the UNIX-based DNS server. Configure forwarders on your Windows-based DNS server.
C.
Create a primary zone named contoso-ad.com on the UNIX-based DNS server. Create a stub zone on the Windows-based DNS server for the contoso-ad.com domain. Configure conditional forwarders on your Windows-based DNS server for the contoso-ad.com and contoso.com domains.
D.
Create a primary zone named contoso-ad.com on your Windows-based DNS server. Create a secondary zone on the UNIX-based DNS server for the contoso-ad.com domain.
Explanation:
A primary zone contains the master copy of the zone database, where administrators make all changes to the zone’s resource records. If the Store “The Zone In Active Directory” (this is only available if DNS Server is a Domain Controller) check box is cleared, the server creates a primary master zone database file on the local drive. This is a simple text file that is compliant with most non-Windows DNS server implementations.To delegate a zone means to assign authority over portions of your DNS namespace to subdomains within this namespace. A zone delegation occurs when the responsibility for the resource records of a subdomain is passed from the owner of the parent domain to the owner of the subdomain.
The Forwarders tab of the DNS server properties dialog box allows you to forward DNS queries received by the local DNS server to upstream DNS servers, called forwarders. This tab also allows you to disable recursion for select queries (as specified by domain).
“A Composite Solution With Just One Click” – Certification Guaranteed 37 Microsoft 70-293 Exam
Reference:Dan Holme, and Orin Thomas, MCSA/MCSE Self-Paced Training Kit: Upgrading Your Certification to Microsoft Windows Server 2003: Managing, Maintaining, Planning, and Implementing a Microsoft Windows Server 2003 Environment: Exams 70-292 and 70-296, Microsoft Press, Redmond, Washington, 2004, Chapter 7 and 8.
J. C. Mackin, Ian McLean, MCSA/MCSE self-paced training kit (exam 70-291): Implementing, Managing, and Maintaining a Microsoft Windows Server 2003 Network Infrastructure, Microsoft Press, Redmond, Washington, 2004, Chapter 5.
Craig Zacker, MCSE Self-Paced Training Kit (Exam 70-293): Planning and Maintaining a Microsoft Windows Server 2003 Network Infrastructure, Microsoft Press, Redmond, Washington, 2004, p. 4: