Which two statements about Cisco IOS XR NTP configuration are true? (Choose two.)
A.
A network device can obtain NTP time information in three ways: polling the NTP server,
listening to NTP broadcasts, and listening to NTP multicasts.
B.
NTP authentication supports MD5, SHA1, or SHA2.
C.
Client mode is a peer-to-peer mode.
D.
The two types of poll-based NTP associations are client mode and symmetric active
mode.
E.
The Cisco IOS-XR implementation of NTP supports stratum 1 service.
F.
In client mode, clients can dynamically learn the NTP sever IP address by listening to the
NTP server broadcasts or multicasts.