NCK
System Clock
If this message is to be used to automatically reset/correct system clocks, it is recommended that the system or administrative personnel initiating the NMQ with the NCK segment have the authority to correct the clock (system date and time) for the other systems on the network. This is important in order to avoid the obvious confusion of multiple systems attempting to resynchronize each other's clocks.
If this message is used only to gather information on the various system's clocks, it is still important for an administrative procedure to be worked out to avoid conflicts when resetting clocks.
RRequiredOOptionalCConditionalWWithdrawn|#Date/Time*Backward compat.+Filler
1
3