Cisco CCNA 200-301 Practice Question

The correct command is ntp server 192.168.1.100. This command configures the router to synchronize its clock with the external NTP server at 192.168.1.100. By default, once the router is synchronized, it will act as an NTP server and provide time synchronization to internal devices that are configured to use it as their NTP server. The ntp master command is not necessary here; it is used when there is no external NTP server available and the router needs to act as a time source using its own internal clock, which could lead to less accurate timekeeping. The ntp peer command establishes a symmetric relationship with another NTP device, which is not required in this scenario. The ntp broadcast command is used for broadcasting NTP messages, but clients would need to be configured to receive these broadcasts, making it less suitable for precise time synchronization requirements.