STD.IS0 8602-ENGL 1995 48519030694718117 INTERNATIONAL ISO/IEC STANDARD 8602 First edition 1995-04-15 AMENDMENT 1 1996-12-15 Information technology - Protocol for providing the Osl connectionless-mode transport service AMENDMENT 1: Addition of connectionless mode multicast capability Technologies de I'information Protocole pour la fourniture du service de transport OSIen mode sans connexion AMENDEMENT1:Addition d'une capacitemultidestinataire en mode sans connexion Organization for Standardization (ISO) Copyright License number IHS/IcC/1996. Not for resale. No part of these Iso documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of Iso (Case postale 56, 1211 Geneva 20, Switzerland, Fax +41227341079),IHSortheISOLicensor'smembers. IEC Reference number ISO/IEC 8602:1995/Amd.1:1996(E) Copyright International Organization for Standardization Not for Resale STD.IS0 8602-ENGL 1995 ES0 6Tzh90 E06TSh ISO/IEC 8602:1995/Amd.1:1996(E) Foreword ISO (the International Organization for Standardization) and IEC (the Inter- national Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established 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/IEC JTC 1. Draft International Standards adopted by the 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. Amendment 1 to International Standard ISO/IEC 8602:1995 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Sub- committee SC 6, Telecommunications and information exchange between systems, in collaboration with ITU-T. The identical text is published as ITU-T Rec. X.234/Amd.1. ISO/IEC 1996 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 micro- film, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 · CH-1211 Geneve 20- Switzerland Printed in Switzerland Not for Resale STD.IS0 8602-ENGL 1995 48519030694720875 ISO/IEC ISO/IEC 8602:1995/Amd.1:1996(E) Introduction This amendment to ITU-T Rec. X.234 (1994) 1ISO/IEC 8602:1995 provides the capability to the connectionless-mode Transport protocol to support multicast PDU transfer when used in conjunction with the multicast services of the connectionless-mode Network service. The protocol for providing the connectionless-mode Transport service is contained entirely in ITU-T Rec. X.234 1ISO/IEC 8602. ITU-T Rec. X.234 I ISO/IEC 8602 restricts the connectionless-mode Transport to the case of exchanging TPDUs between one sending TS-user and one receiving TS-user, Subnetwork standards exist which support the transfer of a SDU from one entity to a number of other entities in a single logical operation. Work is on-going to develop the Transport service via multicast capabilities of the Network service if they are available. With the current ITU-T Rec. X.234 IISO/IEC 8602, no Transport layer capabilities are described to utilize such multicast Network services. This amendment defines additional assumptions concerning the services optionally provided by the Network layer and addsnonewfunctionsof itsown. ii Copyright International Organization for Standardizatior Not for Resale