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Microsoft Press mcts training kit 70 - 642 configuring windows server 2008 network infrastructure p4

1. Một máy chủ DNS đầu tiên cố gắng giải quyết một truy vấn bằng cách sử dụng các bản ghi tài nguyên được lưu trữ trong một khu vực địa phương cấu hình. 2. Nếu một máy chủ DNS không thể giải quyết một truy vấn bằng cách sử dụng vùng dữ liệu, nó cố gắng để trả lời các truy vấn bằng cách sử dụng những thông tin lưu trữ. | 176 Chapter 3 Configuring a DNS Zone Infrastructure NOTE Enabling transfers to secondary zones Note that a secondary zone will not be recognized as a valid name server until it contains a valid copy of zone data. For the secondary zone to obtain this data you must first enable zone transfers to that server by using the Zone Transfers tab in the zone properties dialog box. This tab is discussed in more detail in Lesson 2 Configuring Zone Replication and Transfers. After you create the record a line such as the following appears in the standard zone file @ NS dns1.lucernepublishing.com. In this record the @ symbol represents the zone defined by the SOA record in the same zone file. The complete entry then effectively maps the lucernepublishing.com domain to a DNS server named dns1.lucernepublishing.com. Creating Resource Records Beyond the SOA and NS records some other resource records are also created automatically. For example if you choose to install a new DNS server when promoting a server to a domain controller many SRV records for AD DS services are automatically created in the locally hosted zone. In addition through dynamic updates many DNS clients automatically register host A or AAAA and pointer PTR records in a zone by default. Even though many resource records are created automatically in a production environment you usually need to create some resource records manually as well. Such records might include Mail Exchanger MX records for mail servers Alias CNAME records for Web servers or application servers and host records for servers or clients that cannot perform their own updates. To add a resource record for a zone manually right-click the zone icon in the DNS Manager console and then choose the type of resource record you want to create from the shortcut menu. Figure 3-12 demonstrates the creation of a new MX record. After you make your selection from the shortcut menu a new dialog box appears in which you can specify the name of the record and the .