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Full Description

Scope

This standard defines Ethernet local area, access and metropolitan area networks. Ethernet is specified at selected speeds of operation; and uses a common media access control (MAC) specification and management information base (MIB). The Carrier Sense Multiple Access with Collision Detection (CSMA/CD) MAC protocol specifies shared medium (half duplex) operation, as well as full duplex operation. Speed specific Media Independent Interfaces (MIIs) provide an architectural and optional implementation interface to selected Physical Layer entities (PHY). The Physical Layer encodes frames for transmission and decodes received frames with the modulation specified for the speed of operation, transmission medium and supported link length. Other specified capabilities include: control and management protocols, and the provision of power over selected twisted pair PHY types.

Abstract

Revision Standard - Superseded. Ethernet local area network operation is specified for selected speeds of operation from 1 Mb/s to 400 Gb/s using a common media access control (MAC) specification and management information base (MIB). The Carrier Sense Multiple Access with Collision Detection (CSMA/CD) MAC protocol specifies shared medium (half duplex) operation, as well as full duplex operation. Speed specific Media Independent Interfaces (MIIs) allow use of selected Physical Layer devices (PHY) for operation over coaxial, twisted pair or fiber optic cables, or electrical backplanes. System considerations for multisegment shared access networks describe the use of Repeaters that are defined for operational speeds up to 1000 Mb/s. Local Area Network (LAN) operation is supported at all speeds. Other specified capabilities include: various PHY types for access networks, PHYs suitable for metropolitan area network applications, and the provision of power over selected twisted pair PHY types.
 

Document History

  1. IEEE 802.3-2022


    IEEE Standard for Ethernet

    • Most Recent
  2. IEEE 802.3-2018

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    IEEE Standard for Ethernet

    • Historical Version
  3. IEEE 802.3-2015


    IEEE Standard for Ethernet

    • Historical Version
  4. IEEE 802.3-2012


    IEEE Standard for Ethernet

    • Historical Version
  5. IEEE 802.3-2008


    IEEE Standard for Information technology--Telecommunications and information exchange between systems--Local and metropolitan area networks--Specific requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications

    • Historical Version
  6. IEEE 802.3-2005


    IEEE Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications

    • Historical Version
  7. IEEE 802.3-2002


    Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications

    • Historical Version
  8. IEEE 802.3-2002


    IEEE Standard for Information technology-Telecommunications and information exchange between systems-Local and metropolitan area networks-Specific requirements Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications

    • Historical Version
  9. IEEE 802.3-2000


    IEEE Standard for Information Technology - LAN/MAN - Specific Requirements - Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications

    • Historical Version
  10. IEEE 802.3-1998


    IEEE Standards for Information technology¿¿¿Telecommunications and information exchange between systems¿¿¿Local and metropolitan area networks-Specific requirements-Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications

    • Historical Version
  11. IEEE 802.3-1985


    IEEE Standards for Local Area Networks: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications

    • Historical Version
 

Amendments, rulings, supplements, and errata

  1. IEEE 802.3df-2024


    IEEE Standard for Ethernet Amendment 9: Media Access Control Parameters for 800 Gb/s and Physical Layers and Management Parameters for 400 Gb/s and 800 Gb/s Operation

  2. IEEE 802.3cy-2023


    IEEE Standard for Ethernet Amendment 8: Physical Layer Specifications and Management Parameters for 25 Gb/s - Electrical Automotive Ethernet

  3. IEEE 802.3cz-2023


    IEEE Standard for Ethernet Amendment 7: Physical Layer Specifications and Management Parameters for Multi-Gigabit Glass Optical Fiber Automotive Ethernet

  4. IEEE 802.3cx-2023


    IEEE Standard for Ethernet Amendment 6: Media Access Control (MAC) Service Interface and Management Parameters to Support Improved Precision Time Protocol (PTP) Timestamping Accuracy

  5. IEEE 802.3de-2022


    IEEE Standard for Ethernet - Amendment 5: Enhancements to the MAC Merge and Time Synchronization Service Interface for Point-to-Point 10 Mb/s Single Pair Ethernet

  6. IEEE 802.3db-2022


    IEEE Standard for Ethernet - Amendment 3: Physical Layer Specifications and Management Parameters for 100 Gb/s, 200 Gb/s, and 400 Gb/s Operation over Optical Fiber using 100 Gb/s Signaling

  7. IEEE 802.3dd-2022


    IEEE Standard for Ethernet Amendment 1: Power over Data Lines of Single Pair Ethernet

  8. IEEE 802.3cs-2022


    IEEE Standard for Ethernet Amendment 2: Physical Layers and Management Parameters for Increased-Reach Point-to-Multipoint Ethernet Optical Subscriber Access (Super-PON)

  9. IEEE 802.3ck-2022


    IEEE Standard for Ethernet Amendment 4: Physical Layer Specifications and Management Parameters for 100 Gb/s, 200 Gb/s, and 400 Gb/s Electrical Interfaces Based on 100 Gb/s Signaling

  10. IEEE 802.3cp-2021


    IEEE Standard for Ethernet -- Amendment 14: Bidirectional 10 Gb/s, 25 Gb/s, and 50 Gb/s Optical Access PHYs

  11. IEEE 802.3cv-2021


    IEEE Standard for Ethernet Amendment 12: Maintenance #15: Power over Ethernet

  12. IEEE 802.3ct-2021


    IEEE Standard for Ethernet Amendment 13: Physical Layers and Management Parameters for 100 Gb/s Operation over DWDM Systems

  13. IEEE 802.3cu-2021


    IEEE Standard for Ethernet - Amendment 11: Physical Layers and Management Parameters for 100 Gb/s and 400 Gb/s Operation over Single-Mode Fiber at 100 Gb/s per Wavelength

  14. IEEE 802.3cr-2021


    IEEE Standard for Ethernet Amendment 10: Maintenance #14: Isolation

  15. IEEE 802.3ca-2020

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    IEEE Standard for Ethernet Amendment 9: Physical Layer Specifications and Management Parameters for 25 Gb/s and 50 Gb/s Passive Optical Networks

  16. IEEE 802.3ch-2020


    IEEE Standard for Ethernet--Amendment 8:Physical Layer Specifications and Management Parameters for 2.5 Gb/s, 5 Gb/s, and 10 Gb/s Automotive Electrical Ethernet

  17. IEEE 802.3cq-2020


    IEEE Standard for Ethernet Amendment 6: Maintenance #13: Power over Ethernet over 2 pairs

  18. IEEE 802.3cm-2020


    IEEE Standard for Ethernet -- Amendment 7: Physical Layer and Management Parameters for 400 Gb/s over Multimode Fiber

  19. IEEE 802.3cn-2019


    IEEE Standard for Ethernet - Amendment 4: Physical Layers and Management Parameters for 50Gb/s, 200Gb/s, and 400Gb/s Operation over Single-Mode Fiber

  20. IEEE 802.3cg-2019


    IEEE Standard for Ethernet - Amendment 5: Physical Layer Specifications and Management Parameters for 10 Mb/s Operation and Associated Power Delivery over a Single Balanced Pair of Conductors

  21. IEEE 802.3cd-2018


    IEEE Standard for Ethernet - Amendment 3: Media Access Control Parameters for 50 Gb/s and Physical Layers and Management Parameters for 50 Gb/s, 100 Gb/s, and 200 Gb/s Operation

  22. IEEE 802.3bt-2018


    IEEE Standard for Ethernet Amendment 2: Physical Layer and Management Parameters for Power over Ethernet over 4 pairs

  23. IEEE 802.3cb-2018


    IEEE Standard for Ethernet - Amendment 1:Physical Layer Specifications and Management Parameters for 2.5 Gb/s and 5 Gb/s Operation over Backplane