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Request for Comments number 29

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RFC0029 Response to RFC 28


RFC0029   Response to RFC 28    R.E. Kahn [ January 1970 ] ( TXT = 790 bytes)(Also RFC0028)

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Network Working Group                                   Robert Kahn
RFC-29                                                  BBN
                                                        19 January 1970





This note is in response to Bill English's Request for Comments:  28.

A "millisecond" clock should be satisfactory for most network measurements.
Round-trip message transit times typically should be at least on the
order of tens to hundreds of milliseconds.  The IMP contains a 16-bit
hardware clock which is incremented every 100 microseconds to allow for
timing of internal events within the IMP, as for example, during tracing.
However, most measurements are made using a 25.6 ms. software clock.














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L. Roberts, ARPA
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