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171dotBE heeft zijn naam verbonden aan één van de vele belangrijke protocollen waar het Internet gebruik van maakt. RFC 171, het Data Transfert Protocol. De eerste pagina publiceren we hier onder. Het complete document kan u HIER nalezen.

Network Working Group                                                                                                                                                           Abhay Bhushan
Request for Comments: 171                                                                                                                                                                       MIT
NIC 6793                                                                                                                                                                                        Bob Braden
Categories: D.4, D.5, and D.7                                                                                                                                                                  UCLA
Updates: 114                                                                                                                                                                                Will Crowther
Obsolete: None                                                                                                                                                                          Alex McKenzie
BBN
Eric Harslem
John Heafner
Rand
John Melvin
Dick Watson
SRI
Bob Sundberg
HARVARD
Jim White
UCSB
23 June 1971

THE DATA TRANSFER PROTOCOL

I. INTRODUCTION

A common protocol is desirable for data transfer in such diverse applications as remote job entry, file transfer, network mail system, graphics, remote program execution, and communication with block data terminals (such as printers, card, paper tape, and magnetic tape equipment, especially in context of terminal IMPs). Although it would be possible to include some or even all of the above
applications in an all-inclusive file transfer protocol, a separation between data transfer and application functions would provide flexibility in implementation, and reduce complexity. Separating the data transfer function would also reduce proliferation of programs and protocols.

We have therefore defined a low-level data transfer protocol (DTP) to be used for transfer of data in file transfer, remote job entry, and other applications protocols. This paper concerns itself solely with the data transfer protocol. A companion paper (RFC 172) describes file transfer protocol.

II. DISCUSSION

The data transfer protocol (DTP) serves three basic functions. It provides for convenient separation of NCP messages into “logical”  blocks (transactions, units, records, groups, and files), it allows for the separation of data and control information, and it includes some error control mechanisms.