Your network contains an Active Directory domain named adatum.com.
The domain contains three domain controllers.
The domain controllers are configured as shown in the following table.
DC3 loses network connectivity due to a hardware failure.
You plan to remove DC3 from the domain.
You log on to DC3.
You need to identify which service location (SRV) records are registered by DC3.
What should you do?
A.
Open the %windir%\system32\dns\backup\adatum.com.dns file.
B.
Run ipconfig /displaydn*.
C.
Run dcdiag /test:dns,
D.
Open the %windir%\system32\config\netlogon.dns file.
Explanation:
The netlogon.dns file contains all registrations.
it’s not the best way but it’s a possible way.
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http://support.microsoft.com/kb/816587/en-us
How to verify that SRV DNS records have been created for a domain controller
The SRV record is a Domain Name System (DNS) resource record that is used to identify computers that host
specific services. SRV resource records are used tolocate domain controllers for Active Directory. To verify
SRV locator resource records for a domain controller, use one of the following methods.
DNS Manager
After you install Active Directory on a server running the Microsoft DNS service, you can use the DNS
Management Console to verify that the appropriate zones and resource records are created for each DNS
zone.
Active Directory creates its SRV records in the following folders, where Domain_Name is the name of your
domain:
Forward Lookup Zones/Domain_Name/_msdcs/dc/_sites/Default-First-Site-Name/_tcp Forward Lookup Zones/
Domain_Name/_msdcs/dc/_tcp
In these locations, an SRV record should appear forthe following services:
_kerberos
_ldap
Netlogon.dns
If you are using non-Microsoft DNS servers to support Active Directory, you can verify SRV locator resource
records by viewing Netlogon.dns. Netlogon.dns is located in the %systemroot%\System32\Config
folder. You can use a text editor, such as Microsoft Notepad, to view this file.
The first record in the file is the domain controller’s Lightweight Directory Access Protocol (LDAP) SRV record.
This record should appear similar to the following:
_ldap._tcp.Domain_Name
Nslookup
Nslookup is a command-line tool that displays information you can use to diagnose Domain Name System
(DNS) infrastructure.
To use Nslookup to verify the SRV records, follow these steps:
On your DNS, click Start, and then click Run.
In the Open box, type cmd.
Type nslookup, and then press ENTER.
Type set type=all, and then press ENTER.
Type _ldap._tcp.dc._msdcs.Domain_Name, where Domain_Name is the name of your domain, and then
press ENTER.
Nslookup returns one or more SRV service location records