An Internet standard protocol (built on top of TCP/IP) that assures accurate synchronization to the
millisecond of computer clock times in a network of computers. Which of the following statement is true
for NTP Stratum Levels?

A.
A stratum-3 server gets its time over a network link, via NTP, from a stratum-2 server, and so
on

B.
A stratum-2 server is directly linked (not over a network path) to a reliable source of UTC time
such as GPS, WWV, or CDMA transmissions

C.
Stratum-0 servers are used on the network; they are not directly connected to computers which
then operate as stratum-1 servers

D.
Stratum-1 time server is linked over a network path to a reliable source of UTC time such as
GPS, WWV, or CDMA transmissions