4851903 05997872T1 INTERNATIONAL ISO/IEC STANDARD 8473-4 First edition 1995-03-15 Information technology Protocol for providing the connectionless-mode network service: Provision of the underlying service by a subnetwork that provides the OSl data link service Technologies de I'information -- Protocole de fourniture du service de réseau en mode sans connexion: Fourniture du service sous-jacent par un sous-reseau fournissant le service de liaison de données Osi IEC Reference number ISO/IEC 8473-4:1995(E) tion 4851903 0599788138 ISO/IEC 8473-4:1995(E) CONTENTS Page 1 Scope 2 Normative references 1 2.1 Identical Recommendations I International Standards 1 2.2 Paired Recommendations I International Standards identic 1 2.3 Additional references . 1 3 Definitions 2 3.1 Reference model definitions . 2 3.2 Network layer architecture definitions... 2 3.3 Network layer addressing definitions .. 2 3.4 Data link service definitions ... 2 4 Abbreviations. 2 5 Subnetwork dependent convergence function. 3 5.1 General model.... 3 5.2 Subnetwork user data... 3 5.3 Subnetwork dependent convergence functions used with subnetworks that provide the OsI data link service.. 3 Annex A - PICS proforma .. 6 A.1 Introduction... 6 A.2 Abbreviations and special symbols... 6 A.3 Instructions for completing the PICS proforma... 6 A.4 Identification.. 8 A.5 Major capabilities.. 9 A.6 Subnetwork dependent convergence functions for use with subnetworks that provide the OsI connectionless Data Link service.... 9 A.7 Subnetwork dependent convergence functions for use with subnetworks that provide the OSI connection-mode Data Link service ... 9 @ ISO/IEC 1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii CopYRIGHTInternational Organization for Standardization 48519030599789074 @ ISO/IEC ISO/IEC 8473-4:1995(E) Foreword ISO (the International Organization for Standardization) and IEC (the Inter- national Electrotechnical Commission) form the specialized system for worldwide standardization.Nationalbodiesthat aremembersofISOorIECparticipateinthe developmentofInternational Standardsthroughtechnicalcommitteesestablished by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee,ISO/IECJTC1.DraftInternationalStandards adoptedbythe joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. mittee ISO/IEC JTC 1, Information technology, Subcommittee SC 6, Telecom- munications and information exchange between systems, in collaboration with ITU-T. The identical text is published as ITU-T Recommendation X.623. ISO/IEC 8473 consists of the following parts, under the general title Information technology - Protocol for providing the connectionless-mode network service: -Part I: Protocol specification Part 2: Provision of the underlying service by an ISO/IEC 8802 subnetwork -Part 3: Provision of the underlying service by an X.25 subnetwork Part 4: Provision of the underlying service by a subnetwork that provides the OSI data link service Annex A forms an integral part of this part of ISO/IEC 8473. ii COPYRIGHTInt l organization for Standardization