RFC 264 (rfc264) - Page 1 of 9

The Data Transfer Protocol

Alternative Format: Original Text Document
Next >
Network Working Group                                         A. Bhushan
Request for Comments: 264                                            MIT
NIC: 7812                                                      B. Braden
                                                                    UCLA
                                                             W. Crowther
                                                                     BBN
                                                              E. Harslem
                                                              J. Heafner
                                                                    Rand
                                                             A. McKenzie
                                                                     BBN
                                                               J. Melvin
                                                                     SRI
                                                             B. Sundberg
                                                                 Harvard
                                                               D. Watson
                                                                     SRI
                                                                J. White
                                                                    UCSB
                                                        15 November 1971


                       THE DATA TRANSFER PROTOCOL

   This paper is a revision of RFC 171, NIC 6793.  The changes to RFC
   171 are given below.  The protocol is then restated for your
   convenience.

CHANGES TO RFC 171

   1) The sequence number field is changed to 16 bits in the error (Type
      B5) transactions, thus resolving the ambiguity in the previous
      specification.  In addition, the information separators (Type B4)
      transactions shall also contain a 16-bit sequence number field.

   2) The modes available (Type B3) transactions shall define only the
      modes available for receive, instead of both receive and send.  In
      simplex connections modes available transactions should not be
      sent as they are meaningless.  In full-duplex connections, the
      modes available transactions are still required.

   3) The code assignments for "End Code" in information separators and
      for "function" in abort transactions have been changed to reflect
      a numerical order rather than "bit-coding".

   4) Minor editorial changes.





Bhushan, et. al.
Next >