MSCA 70-291 Windows Server 2003 Exam Prep

Answer - B - The PDC Emulator performs time-synchronization duties.

Key Takeaway: The PDC emulator synchronizes the time on all domain controllers throughout the domain. It gets its clock set to the clock on an arbitrary domain controller in the parent domain. However, the PDC emulator in the parent domain should be configured to synchronize with an external time source. You can synchronize the time on the PDC emulator with an external server by executing the net time command.