| NTP Server | Grade
(Mode) |
| 128.2.1.21 | A- |
| AC-NTP1.NET.CMU.EDU |
30-day Grade History
| A- |
A- |
A- |
A- |
A- |
B |
B+ |
A- |
A |
A |
A |
A |
A- |
A |
B+ |
B+ |
B+ |
A- |
A- |
A- |
A- |
B+ |
B+ |
A- |
A- |
A- |
B+ |
B+ |
A |
— |
30-day Clock Offset History
+3ms
-3ms
30-day Clock Jitter History
8ms
30-day Round-trip Delay History
32ms
30-day Round-trip Delay Standard Deviation History
6ms
30-day Availability History
100%