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Under the Platform Administration GUI, if an NTP server isn't specified, what will the Cisco Unified CallManager cluster use for a time source?
Correct Answer: B
Explanation/Reference: Cisco Unified Communications System 8.x SRND pg.3-33 Unified CM automatically synchronizes the NTP time of all subscribers in the cluster to the publisher. During installation, each subscriber is automatically configured to point to an NTP server running on the publisher. The publisher considers itself to be a master server and provides time for the cluster based on its internal hardware clock unless it is configured to synchronize from an external server.