Refer to the exhibit. A network engineer is testing NTP authentication, and realizes that any device can synchronize time with this router and that NTP authentication is not enforced. Which option is likely the issue?
nTP authentication-key 10 md5 cisco123ntp trusted-key 10
A. Only SHA-1 is allowed as a hashing algorithm for NTP authentication.
B. The key must be configured in hashed format, not plain text.
C. NTP authentication needs to be specifically enabled.
D. The router must be rebooted before NTP can update.
