Which command queries the ntpd daemon about its current state and requests changes in that state?

Which command queries the ntpd daemon about its current state and requests changes in that state?

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

Answer: (D)

The command used to manage ntpd by querying its current state and issuing changes is ntpdc. It’s the control utility designed to talk to ntpd, retrieve status information, and apply administrative changes to the daemon’s behavior. The other options serve different roles: ntpd is the daemon itself, not a management tool; ntpq is a query utility that reports status but doesn’t modify state; and ntpdate is a simple time-setting tool that syncs the clock without interacting with ntpd’s state or configuration.

The command used to manage ntpd by querying its current state and issuing changes is ntpdc. It’s the control utility designed to talk to ntpd, retrieve status information, and apply administrative changes to the daemon’s behavior. The other options serve different roles: ntpd is the daemon itself, not a management tool; ntpq is a query utility that reports status but doesn’t modify state; and ntpdate is a simple time-setting tool that syncs the clock without interacting with ntpd’s state or configuration.