JN0-106 Operational Monitoring and Maintenance Practice Question
A network engineer needs to analyze NTP synchronization status and offset. Which command provides detailed NTP peer information including delay, offset, and jitter?
⚠ Common exam trap
The trap here is that candidates familiar with Cisco IOS may expect 'show ntp peer' to work, but Junos uses 'show ntp associations' for the same detailed peer information, while 'show ntp peer' is not a valid command.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
show ntp associations
The 'show ntp associations' command displays detailed NTP peer information, including delay, offset, and jitter, which are essential for analyzing synchronization status. This command lists all configured NTP peers and their current state, providing the specific metrics needed to assess clock accuracy and stability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
show ntp statistics
Why it's wrong here
The Junos operational command 'show ntp statistics' provides packet-level counters such as packets sent, received, dropped, and last update times, but it does not break down the synchronization state per NTP peer. This makes it useful for diagnosing packet loss or rate issues, yet it lacks the per-peer offset, jitter, and delay values needed to analyze the overall synchronization hierarchy.
- ✓
show ntp associations
Why this is correct
'show ntp associations' is the correct command because it displays a row for each configured NTP peer, including its address, stratum, delay, offset, and jitter. Junos also marks the currently synchronized peer with an asterisk (*) and the local clock with 'o', giving the engineer an immediate, per-peer snapshot of the NTP synchronization status.
- ✗
show ntp status
Why it's wrong here
While 'show ntp status' does reveal whether the local system is synchronized, along with the stratum and the reference peer, it only offers a single global summary. It lacks the detailed per-peer metrics (delay, offset, jitter) for all candidate peers, so it cannot support a thorough analysis of how NTP synchronization is behaving across multiple associations.
- ✗
show ntp peer
Why it's wrong here
The command 'show ntp peer' is not a valid Junos operational command; Junos uses the syntax 'show ntp associations' and 'show ntp status' for NTP inspection. Entering 'show ntp peer' will produce a CLI parse error, so it cannot provide any NTP synchronization information.
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