What NTP stratum level is a server that is connected directly to an authoritative time source? Stratum 0 Stratum 1 Stratum 14 Stratum 15. Which two security features are available when implementing NTP? (Choose two) encrypted authentication mechanism clock offset authentication broadcast association mode access list based restriction scheme symmetric server passwords. Which two mechanisms are available to secure NTP? (Choose two) IP prefix list-based IPsec TACACS-based authentication IP access list-based Encrypted authentication. Why would a log file contain a * next to the date? The network device is not configured to use NTP time stamps for logging. The network device was unable to reach the NTP server when the log messages were recorded. The network device is not configured to use NTP The network device was receiving NTP time when the log messages were recorded.