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IETF RFC 1128
[ACTIVE]

Measured performance of the Network Time Protocol in the Internet system

Metadata

Publisher
IETF
Doc Type
Specification
Pages
1
Abstract
This paper describes a series of experiments involving over 100,000 hosts of the Internet system and located in the U.S., Europe and the Pacific. The experiments are designed to evaluate the availability, accuracy and reliability of international standard time distribution using the DARPA/NSF Internet and the Network Time Protocol (NTP), which is specified in RFC-1119. NTP is designed specifically for use in a large, diverse internet system operating at speeds from mundane to lightwave. In NTP a distributed subnet of time servers operating in a self-organizing, hierarchical, master-slave configuration exchange precision timestamps in order to synchronize subnet clocks to each other and national time standards via wire or radio. The experiments are designed to locate Internet hosts and gateways that provide time by one of three time distribution protocols and evaluate the accuracy of their indications. For those hosts that support NTP, the experiments determine the distribution of errors and other statistics over paths spanning major portions of the globe. Finally, the experiments evaluate the accuracy and reliability of precision timekeeping using NTP and typical Internet paths involving DARPA, NSFNET and other agency networks. The experiments demonstrate that timekeeping accuracy throughout most portions of the Internet can be ordinarily maintained to within a few tens of milliseconds, even in cases of failure or disruption of clocks, time servers or networks. This memo does not specify a standard.
Publication Date
1989-10-01
Status Note
Unknown
DOI
10.17487/RFC1128
Link
https://doi.org/10.17487/RFC1128
Author(s)
Professor David L. Mills
Latest version of IETF RFC 1128

Document Versions — IETF RFC 1128

  • ▶ IETF RFC 1128 (1989-10-01)
    THIS DOC [ACTIVE] [LATEST VERSION]
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IETF RFC 1128, Measured performance of the Network Time Protocol in the Internet system. Available at https://doi.org/10.17487/RFC1128
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IETF RFC 1128, Measured performance of the Network Time Protocol in the Internet system. Available at https://doi.org/10.17487/RFC1128

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IETF RFC 1128, Measured performance of the Network Time Protocol in the Internet system. Available at https://doi.org/10.17487/RFC1128
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<span class="citation"><cite>IETF RFC 1128</cite>, Measured performance of the Network Time Protocol in the Internet system. Available at <a href="https://doi.org/10.17487/RFC1128" target="_blank" rel="noopener">https://doi.org/10.17487/RFC1128</a></span>

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IETF RFC 1128, Measured performance of the Network Time Protocol in the Internet system
doi: 10.17487/RFC1128
url: https://doi.org/10.17487/RFC1128
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<cite id="bib-rfc1128">IETF RFC 1128</cite>, Measured performance of the Network Time Protocol in the Internet system
<span class="doi">10.17487/RFC1128</span>
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