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Octet Sequences for Upper-Layer OSI to Support Basic Communications Applications (RFC1698)

IP.com Disclosure Number: IPCOM000002536D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 38 page(s) / 63K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. Furniss: AUTHOR

Abstract

This document states particular octet sequences that comprise the OSI upper-layer protocols (Session, Presentation and ACSE) when used to support applications with "basic communications requirements". These include OSI application protocols such as X.400 P7 and Directory Access Protocol, and "migrant" protocols, originally defined for use over other transports.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 4% of the total text.

Network Working Group P. Furniss

Request for Comments: 1698 Consultant

Category: Informational October 1994

Octet Sequences for Upper-Layer OSI

to Support Basic Communications Applications

Status of this Memo

This memo provides information for the Internet community. This memo

does not specify an Internet standard of any kind. Distribution of

this memo is unlimited.

Abstract

This document states particular octet sequences that comprise the OSI

upper-layer protocols (Session, Presentation and ACSE) when used to

support applications with "basic communications requirements". These

include OSI application protocols such as X.400 P7 and Directory

Access Protocol, and "migrant" protocols, originally defined for use

over other transports.

As well as the octet sequences which are the supporting layer headers

(and trailers) around the application data, this document includes

some tutorial material on the OSI upper layers.

An implementation that sends the octet sequences given here, and

interprets the equivalent protocol received, will be able to

interwork with an implementation based on the base standard, when

both are being used to support an appropriate application protocol.

Table of Contents

1. Introduction ...................................................2

2. General ........................................................3

2.1 Subdivisions of "basic communication applications" ...........3

2.2 Conformance and interworking .................................5

2.3 Relationship to other documents ..............................5

3. Contexts and titles ............................................6

3.1 The concepts of abstract and transfer syntax .................6

3.2 Use of presentation context by cookbook applications..........7

3.3 Processing Presentation-context-definition-list ..............8

3.4 Application context ..........................................9

3.5 APtitles and AEqualifiers ....................................9

4. What has to be sent and received ..............................10

4.1 Sequence of OSI protocol data units used ....................10

4.2 Which OSI fields are used ...................................12

4.3 Encoding methods and length fields ..........................14

4.3.1 Session items .............................................14

4.3.2 ASN.1/BER items (Presentation and ACSE) ...................14

4.4 BER Encoding of values for primitive datatypes ..............15

4.5 Unnece...