Implementing and Operating Cisco Security Core Technologies (SCOR) — Question 312

A network engineer has configured a NTP server on a Cisco ASA. The ASA has IP reachability to the NTP server and is not filtering any traffic. The show ntp association detail command indicates that the configured NTP server is unsynchronized and has a stratum of 16. What is the cause of this issue?

Answer options

• A. An access list entry for UDP port 123 on the outside interface is missing.
• B. Resynchronization of NTP is not forced.
• C. NTP is not configured to use a working server.
• D. An access list entry for UDP port 123 on the inside interface is missing.

Correct answer: C

Explanation

The correct answer is C because a stratum of 16 indicates that the NTP server is not reachable or not functioning properly, which means the ASA is not configured to connect to a valid NTP server. Options A and D are incorrect since they relate to access lists, which are not the issue in this case, and B is not relevant as the problem lies in the server configuration, not in resynchronization.