Which command is used to request changes in the NTP daemon's state after querying it?

Which command is used to request changes in the NTP daemon's state after querying it?

• A. ntpdc
• B. ntpd
• C. ntpq
• D. ntpdate

Answer: (A)

ntpdc is the administrative control tool used to send commands to the running NTP daemon and change its behavior after you’ve checked its status. The daemon (ntpd) runs in the background, while a querying tool like ntpq only asks ntpd for information about peers, associations, and variables. ntpdate, on the other hand, simply sets the local clock from a remote server and doesn’t interact with ntpd’s state. So when you need to modify how ntpd operates—adjusting configuration, reconfiguring peers, or issuing other control actions—you use the control utility ntpdc.

ntpdc is the administrative control tool used to send commands to the running NTP daemon and change its behavior after you’ve checked its status. The daemon (ntpd) runs in the background, while a querying tool like ntpq only asks ntpd for information about peers, associations, and variables. ntpdate, on the other hand, simply sets the local clock from a remote server and doesn’t interact with ntpd’s state. So when you need to modify how ntpd operates—adjusting configuration, reconfiguring peers, or issuing other control actions—you use the control utility ntpdc.