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To help you successfully master the exam objectives presented in this chapter, complete the following tasks.
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Configure a DNS Server
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Use this exercise to practice deploying DNS servers manually (without Dcpromo) and to practice configuring conditional forwarding.
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Practice In a test network, deploy two DNS servers outside of an Active Directory environment. Configure zones for each server with domain names of your choice. Configure both servers with conditional forwarding so that each server forwards queries to the other server when appropriate. Test the configuration.
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Configure Name Resolution for Clients
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Perform this practice to become more familiar with client update behavior. To prepare for this practice, you need to enable dynamic updates in the primary zones hosted on each DNS server.
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Practice Using the same test described in the previous practice, configure a DNS client to register its own host records with one of the DNS servers without specifying a primary DNS suffix for the client computer.
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The practice tests on this book s companion CD offer many options. For example, you can test yourself on just one exam objective, or you can test yourself on all the 70-642 certification exam content. You can set up the test so that it closely simulates the experience of taking a certification exam, or you can set it up in study mode so that you can look at the correct answers and explanations after you answer each question.
MORE INFO
Practice tests
For details about all the practice test options available, see the How to Use the Practice Tests section in this book s Introduction.
3
Configuring a DNS Zone Infrastructure
Deploying a DNS server is a fairly simple procedure, especially on a domain controller. However, DNS is a multifeatured service, and to manage and troubleshoot it adequately you need to become familiar with configuring DNS zones. Zones are the databases in which DNS data is stored, and different types of zones have different features. Common to all zone types is the requirement that data be kept consistent among zones in a common namespace, and to achieve this goal you need to configure zone replication or zone transfers. A DNS zone infrastructure essentially consists of the various servers and hosted zones that communicate with one another in a way that ensures consistent name resolution. This chapter introduces you to the types of zones that make up a DNS infrastructure, the options for zone replications and transfers among them, and the configurable settings within zones that you need to understand in order to manage DNS effectively on your network.
Exam objectives in this chapter:
Configure DNS zones. Configure DNS records. Configure DNS replication.
Lessons in this chapter:
Lesson 1: Creating and Configuring Zones. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163 Lesson 2: Configuring Zone Replication and Transfers . . . . . . . . . . . . . . . . . . . . . . . . 192
3
Configuring a DNS Zone Infrastructure
Before You Begin
To complete the lessons in this chapter, you must have
Two networked computers running Windows Server 2008. The first computer must be a domain controller named Dcsrv1 in a domain named nwtraders.msft. Dcsrv1 must be assigned the static address 192.168.0.1/24 with the DNS server specified as the same address. Dcsrv1 includes the server roles Active Directory Domain Services and DNS Server. The second computer must be named Boston.nwtraders.msft and must be assigned the address 192.168.0.2/24. Its DNS server must be specified as 192.168.0.1. Finally, Boston must be joined to the Nwtraders.msft domain.
Real World
JC Mackin DNS Manager is the main administration tool for DNS servers, but if you need to manage DNS for your job, it s a good idea to become familiar with some other DNS tools as well. Of all the alternate tools available, the Dnscmd command-line tool is the most important and the most powerful. By typing dnscmd at a command prompt, you can see all 40 or so of its subcommands. Some of the most important of these include dnscmd /clear cache, which clears the server cache; dnscmd /enumdirectorypartitions, which shows the application directory partitions available on the local server; and dnscmd /info (which provides a basic overview of the DNS server configuration). If your network includes Active Directory integrated zones, you should also review tools for managing Active Directory replication. If you want to test replication on a domain controller, type dcdiag /test:replications. If you want to show replication partners, type repadmin /showrepl. Finally, if you want to force replication with another domain controller, use the Active Directory Sites and Services console to browse to the NTDS settings beneath your server, right-click the connection object in the details pane, and click Replicate Now.
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