Internet Timekeeping Around the Globe
DELAWARE UNIV NEWARK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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This paper describes a massive survey of Network Time Protocol NTP servers and clients in order to discover statistics of time and frequency errors, as well as determine the health and welfare of the NTP synchronization subnet operating in the global Internet. Among the conclusions of the survey are that most NTP clocks are within 21 ms of their synchronization sources and all are within 29 ms on average. However, additional errors up to one-half the roundtrip delay are possible, but relatively rare. There is, however, a disturbing incidence of improperly operating sewers and misguided server configurations.
- Computer Programming and Software
- Electricity and Magnetism
- Radio Communications