Browse Prior Art Database

Response to RFC 28 (RFC0029)

IP.com Disclosure Number: IPCOM000003486D
Original Publication Date: 1970-Jan-19
Included in the Prior Art Database: 2001-Oct-17
Document File: 1 page(s) / 1K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R.E. Kahn: AUTHOR

Abstract

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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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