Your network contains an Active Directory domainnamed contoso.com.
The propertiesof the contoso.com DNS zoneare configured as shown in the exhibit:

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:
Reference:
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.
http://en.wikipedia.org/wiki/SRV_record
SRV record
A Service record (SRV record) is a specification ofdata in the Domain Name System defining the location, i.e.
the hostname and port number, of servers for specified services.