Final answer:
Kerberos, a security protocol that relies on time stamps for authentication, will be affected if NTP is not working correctly.
Step-by-step explanation:
If NTP (Network Time Protocol) is not working correctly, the security protocol that will be affected is Kerberos. This protocol relies on time stamps for the authentication process, meaning that accurate synchronization of system clocks across the network is crucial. If NTP fails, time discrepancies can lead to authentication errors and potential security breaches as Kerberos tickets will have incorrect time stamps, rendering them invalid or making them susceptible to replay attacks.
Kerberos is a network authentication protocol that requires synchronized clocks between the client and the authentication server. If there is a significant time skew or if NTP is not functioning properly, it can lead to authentication failures in Kerberos.