Browse Prior Art Database

Views on issues relevant to data sharing on computer networks (RFC0146) Disclosure Number: IPCOM000002288D
Original Publication Date: 1971-May-12
Included in the Prior Art Database: 2000-Sep-12
Document File: 4 page(s) / 9K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P.M. Karp: AUTHOR [+3]

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 32% of the total text.

Network Working, Group P.M. Karp, MITRE

Request for Comments #146 D.B. McKay, IBM

NIC 6742 D.C. Wood, MITRE

12 May 1971

Categories: D.4, D.7

Obsoletes: none

Updates: none

Views on Issues Relevant to Data Sharing

on Computer Networks


The formation of a committee to address the problems of achieving

data sharing on the ARPA Network, as suggested by Arie Shoshani

(RFC #140) is desirable at this point of network development. We

concur with Shoshani's ideas (presented in an introductory paper

to the network data sharing meeting, scheduled for Tuesday, May 18)

and believe that purpose of the committee should be -

a) to classify the issues involved and to propose various


b) to integrate the hitherto independent network activities

that address problems in the area of data sharing, and;

c) to set up and coordinate appropriate experiments to test

the services developed and to evaluate alternative


This position paper is intended to augment Shoshani's as a basis

for discussion at the data sharing meeting. No attempt is made

to discuss specific means of implementation since many approaches

to data handling problems are possible and have been proposed.

Rather, our viewpoint on what the committee's role should be in

giving some cohesion to various existing implementations is


Our Views

One approach to achieving data sharing on the ARPA Network can

be thought of as having three stages, which roughly correspond to

the modes of use or operation. Within each stage are various levels

of development required to get to the next stage. This development

is not necessarily sequential. A description of the three stages


Stage 1: Data handling services are provided at various Hosts.

The user talks directly to the serving Host (via TELNET

or by addressing a known socket) to explicitly access

the service. This mode of operation corresponds to

Bhushan's category of "direct" usage (RFC #114). The

data services provided by the serving Host range from

simple ones, such as White's file transfer system (RFC #122)

to sophisticated systems such as the CCA's data machine

(NIC 5791 and 6706).

Stage 2: The user has access to an intermediate process or data

control facility* that routes his requests for a particular

data service to the serving system. The user must explicitly

identify the data services to the used. This mode of

operation corresponds to Bhushan's category of "indirect"

access. The data control facility provides the necessary

control commands, data transformations, and accessing

methods. A single request would include the use of several

interacting services. ...