[Question] How do we setup an authoritative NTP server with a Site ID?

[m4mohdali 7]

Q). What command can you enter to configure the switch as an authoritative ntp server with site id : 15122473?

A. Switch(config)#ntp master 3

B. Switch(config)#ntp peer IP 193.168.2.2

C. Switch(config)#ntp server IP 193.168.22

D. Switch(config)#ntp source IP 193.168.2.2

 

The correct answer selected is A. Can somebody please explain this?

[wimwam 186]

An Authoritative NTP Server can distribute time even when it is not synchronized to an existing time server. To configure a Cisco device as an Authoritative NTP Server, use the ntp master [stratum] command.