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多項(xiàng)選擇題

Which two statements are true regarding the use of NTP clock synchronization?()

A. The Junos OS supports client, server, and symmetric modes of NTP operation.
B. Synchronized time on all network devices makes log messages more useful for troubleshooting.
C. Authentication methods are not supported.
D. The Junos OS must be used as the primary time reference.

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