IEC International ISO Standard IEEE ISO/IEC/IEEE 8802-1DC Telecommunications and exchange First edition between information technology 2025-09 systems - Requirements for local and metropolitan area networks - Part 1DC: Quality of service provision by network systems Telécommunications et échange entre systemes informatiques Exigencespourlesreseauxlocauxetmetropolitains- Partie1DC:Qualite des services fournis par les systemes de reseau Referencenumber ISO/IEC/IEEE8802-1DC:2025(en) IEEE 2024 IS0/IEC/IEEE8802-1DC:2025(en) COPYRIGHTPROTECTEDDOCUMENT IEEE2024 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from IEEE at the address below Institute of Electrical and Electronics Engineers, Inc 3 Park Avenue, NewYork NY10016-5997,USA Email: [email protected] Website: www.ieee.org Published in Switzerland @IEEE2024-All rights reserved ii IS0/IEC/IEEE8802-1DC:2025(en) Foreword Iso (the International Organization for Standardization) and IEC (the International 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. The procedures used to develop this document and those intended for its further maintenance are described in the Iso/IEc Directives, Part 1. In particular, the different approval criteria needed for the different types ofdocument should benoted. IEEE Standards documents are developed within IEEE Societies and subcommittees of IEEE Standards Association (IEEE SA) Board of Governors. IEEE develops its standards through an accredited consensus development process, which brings together volunteers representing varied viewpoints and interests to achievethe final product. IEEE standards are documents developed by volunteers with scientific, academic, and industry-based expertise in technical working groups. Volunteers are not necessarily members of IEEE or IEEE SA and participate without compensation from IEEE.While IEEE administers the process and establishes rules to promote fairness in the consensus development process, IEEE does not independently evaluate, test, or verify the accuracy of any of the information or the soundness of any judgments contained in its standards. Iso and IEC draw attention tothepossibility that the implementation ofthis document may involve theuse of (a)patent(s).IsO and IECtakenopositionconcerningthe evidence,validity or applicabilityofany claimed patent rights in respect thereof. As of the date of publication of this document, IsO and IEc had not received notice of (a)patent(s)which maybe required to implement this document.However,implementers are cautioned that this may not represent the latest information, which may be obtained from the patent database available at www.iso.org/patents and https://patents.iec.ch. Iso and IEC shall not be held responsibleforidentifyinganyorall suchpatentrights. Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. Foran explanation of thevoluntary natureof standards,themeaning of Iso specifictermsand expressions related to conformity assessment, as well as information about Iso's adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.htm) In the IEC, see www.iec.ch/underst