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RFC 0029

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.














DISTRIBUTION:

A. Bhushan, MIT
S. Carr. Utah
G. Cole, SDS
S. Crocker, UCLA
K. Fry, MITRE
J. Heafner, RAND
B. Kahn, BBN
T. O'Sullivan, Raytheon
L. Roberts, ARPA
P. Rovner, LL
R. Stoughton, UCSB

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