NTP Clock Synchronization

AB

NTP (Network Time Protocol) is used to synchronize time between network devices. Here are the two true statements regarding the use of NTP clock synchronization:

A. The Junos OS supports client, server, and symmetric modes of NTP operation: The Junos OS supports different modes of NTP operation, which include client mode, server mode, and symmetric mode. In client mode, the device synchronizes its clock to the NTP server. In server mode, the device acts as an NTP server and synchronizes its clock with the NTP clients. In symmetric mode, the devices act both as clients and servers, and synchronize their clocks with each other.

B. Synchronized time on all network devices makes log messages more useful for troubleshooting: If all network devices have synchronized time, it makes log messages more useful for troubleshooting. When troubleshooting network issues, the log messages can provide valuable information. If the time on all devices is synchronized, it helps in correlating the log messages and identifying the sequence of events leading up to the issue.

C. Authentication methods are not supported: This statement is false. NTP authentication is supported in Junos OS. NTP authentication is used to verify the authenticity of NTP packets and prevent spoofing attacks.

D. The Junos OS must be used as the primary time reference: This statement is also false. The Junos OS can synchronize its clock with any NTP server. It is not necessary to use Junos OS as the primary time reference.