Your network contains an Active Directory domain named contoso.com.
The properties of the contoso.com DNS zone are configured as shown in the exhibit. (Click
the Exhibit button.)

You need to update all service location (SRV) records for a domain controller in the domain.
What should you do?

A.
Restart the Netlogon service.

B.
Restart the DNS Client service.

C.
Run sc.exe and specify the triggerinfo parameter.

D.
Run ipconfig.exe and specify the /registerdns parameter.

Explanation:
MCTS 70-640 Cert Guide: Windows Server 2008 Active Directory, Configuring (Pearson IT
Certification, 2010) page 62
The SRV resource records for a domain controller are important in enabling clients to locate
the domain controller. The Netlogon service on domain controllers registers this resource
record whenever a domain controller is restarted. You can also re-register a domain
controller’s SRV resource records by restarting this service from the Services branch of
Server Manager or by typing net start netlogon. An exam question might ask you how to
troubleshoot the nonregistration of SRV resource records.