The current operational mode of the SNTP client. A SET
of this object will cause the SNTP client to change
operational modes. A SET request MUST have only 1 bit
set since is not possible to operate in multiple modes
simultaneously. SETs of this object are further limited
to values supported by the device as specified by
etsysSntpClientSupportedMode. Maintaining the value of this
object across agent reboots is REQUIRED.