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Chapter 8.3. Domain Name System (DNS) > Dynamic DNS - Pg. 386

Domain Name System (DNS) 386 SRV Records SRV records are used, among other things, to locate Domain Controllers and the various servers that participate in an AD environment. The RFC covering the functionality of SRV records is still in draft form as of this writing, but can be found at For more information, see Chapter 4.2, "DNS and Active Directory." Dynamic DNS Dynamic DNS (DDNS) automates the process of A and PTR record creation and deletion and works in tandem with DHCP. Updates are always made on the primary name server in a standard zone. In a zone that has been integrated with AD, any Domain Controller running the DNS service can process a record update. On a Windows 2000 DNS client, the dynamic update process follows this sequence: 1. The client makes a query to its configured name server to retrieve the SOA record for the zone in which it is a member. It uses this record to identify the primary server it needs to contact and the zone it needs to register a record in. The client sends an assertion message, which serves to ascertain whether or not a record already exists for the client. If the client has changed its name or IP address since it last registered, a negative response will be received. If the client receives a response that the record does not exist, the client will respond with an official update request to add the record. If the record already exists with all the same data, 2. 3.