NTP is a network protocol used to synchronize computer clocks with an NTP server. Which of the following statements about NTP is false? A$.$ NTP is a network layer protocol in the TCP$/$IP protocol suite. B$.$ NTP packets are transmitted through UDP.C$.$ The master time server directly synchronizes with the standard reference clock through cables or radio signals. D$.$ The stratum indicates the hierarchy for clock synchronization. The value $1$ indicates the highest clock precision.