Which NTP command configures the local devices as an NTP reference clock source?
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A. B. C. D.C
The correct answer is C. NTP Master.
NTP stands for Network Time Protocol and is used to synchronize the time of devices on a network. NTP uses a hierarchical system of time sources, with each level of the hierarchy being referred to as a stratum. A device that obtains its time directly from an atomic clock is a stratum 0 device, while a device that receives its time from a stratum 1 device is a stratum 2 device, and so on.
To configure a local device as an NTP reference clock source, you need to configure it as an NTP Master. An NTP Master is a device that provides its own time as a reference for other devices on the network. By default, a device that is configured as an NTP client will look to external NTP servers for time synchronization. However, if a device is configured as an NTP Master, other devices on the network can synchronize their time with it.
To configure a device as an NTP Master, you would use the following command:
phpntp master <stratum> The <stratum> parameter specifies the stratum level of the NTP Master. A stratum 1 NTP Master obtains its time from a highly accurate time source, such as an atomic clock. A stratum 2 NTP Master obtains its time from a stratum 1 NTP Master, and so on. In general, it is recommended that you do not configure a device as a stratum 1 NTP Master unless you have access to a highly accurate time source.
In summary, to configure a local device as an NTP reference clock source, you would use the NTP Master command with a specified stratum level.