Exam 70-742 topic 1 question 47 discussion

https://technet.microsoft.com/en-us/library/dd728017(v=ws.10).aspx dcdiag.exe /test:DNS /DnsRecordRegistration This command verifies registration of the following resource records in DNS: -alias (CNAME): the globally unique identifier (GUID)-based resource record that locates a replication partner -host (A): the host resource record that contains the IP address of the domain controller -LDAP SRV: the service (SRV) resource records that locate LDAP servers -GC SRV: the service (SRV) resource records that locate global catalog servers -PDC SRV: the service (SRV) resource records that locate primary domain controller (PDC) emulator operations masters dcdiag.exe /test:DNS Verifying dynamic update If the basic DNS test shows that resource records do not exist in DNS, use the dynamic update test to determine why the Net Logon service did not register the resource records automatically. To verify that the Active Directory domain zone is configured to accept secure dynamic updates and to perform registration of a test record (_dcdiag_test_record), use the following procedure. The test record is deleted automatically after the test.

The reason E does not work is because the correct command is : dcdiag.exe /DnsRecordRegistration and not what's listed. But yeah, both B and C work and should be the correct answers in this question.

C:\Users\Administrator>dcdiag.exe /test:DnsRecordRegistration Test not found. Please re-enter a valid test name. C:\Users\Administrator>dcdiag.exe /test:Dns Directory Server Diagnosis Performing initial setup: Trying to find home server... <more>