Two administrators update the same Active Directory user account at the same time while connected to two different domain controllers. What method does Active Directory replication use to determine what changes to make in the event of a conflict?

Two administrators update the same Active Directory user account at the same time while connected to two different domain controllers. What method does Active Directory replication use to determine what changes to make in the event of a conflict?

• USN - Update Sequence Number
• SID - Security Identifier
• Email to Administrator with links to available choices
• RID - Relative Identifier               

EXPLANATION

Active Directory replication does not depend on time to determine what changes need to be propagated. It relies instead on the use of update sequence numbers (USNs) that are assigned by a counter that is local to each domain controller. Because these USN counters are local, it is easy to ensure that they are reliable and never "run backward" (that is, decrease in value). The trade-off is that it is meaningless to compare a USN assigned on one domain controller to a USN assigned on a different domain controller.
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https://technet.microsoft.com/en-us/library/cc961798.aspx">https://technet.microsoft.com/en-...