Which two security features are available when implementing NTP? (Choose two.)

NTP supports an encrypted authentication mechanism, typically using MD5 or SHA-1, to verify the identity of NTP servers and prevent unauthorized time sources from providing incorrect time. This ensures that time synchronization messages are authentic and haven't been tampered with. Additionally, NTP allows for an access list-based restriction scheme, where administrators can define which IP addresses or networks are permitted to query or synchronize with the NTP server. This helps control access to the NTP service and mitigate denial-of-service attacks. Symmetric server passwords are not a standard NTP security feature; NTP uses authentication keys. Clock offset authentication is not a recognized NTP security feature. Broadcast association mode is an operational mode, not a security feature.