IEEE 802


  • It deals with LAN(local area networks) & MAN (metropolitan area networks)
  • 802 is its basic standard ie IEEE 802 work at DLL and Physical Layer

It divide DLL into two sub layers

  • LLC (Logical Link Control)
  • MAC Address

The physical and data-link components of networking are covered by the 22 parts that make up IEEE 802. The IEEE 802 LAN/MAN Standards Committee, or LMSC, creates and updates the family of standards. The abbreviation IEEE means Institute of Electrical and Electronics Engineers.

802ChannelNetworking concepts.
802.1BridgingLAN/MAN bridging and management.
802.2Logical Link (LLC)Disbanded
802.3EthernetThe 802 specification’s “granddaddy.” Provides asynchronous networking utilising “carrier sense, multiple access with collision detect” (CSMA/CD) across coax, twisted-pair copper and optical fibre medium. Current speeds vary from 10 Mbps to 10 Gbps. Check on the regularly used list of  802.3 technologies.
 802.4Token BusDisbanded
 802.5Token Ring MAC LayerDisbanded
 802.6MAN Distributed queue dual bus (DQDB)Superseded. Revision of 802.1D. Superseded by 802.1D-2004.
 802.7Broadband LAN using Coaxial CableDisbanded
 802.8Fiber OpticDisbanded
 802.9Integrated Services LANDisbanded
802.10Interoperable LAN securityDisbanded
802.11Wi-FiWireless LAN Media Access Control and Physical Layer specification. 802.11a, b, g, etc. are amendments to the original 802.11 standard. Products that implement 802.11 standards must pass tests and are referred to as “Wi-Fi certified.”
802.11aSpecifies a PHY that operates in the 5 Ghz U-NII band in the US — initially 5.15-5.35 AND 5.725-5.85 — since expanded to additional frequenciesUses Orthogonal Frequency-Division MultiplexingEnhanced data speed to 54 MbpsRatified after 802.11b
802.11bEnhancement to 802.11 that added higher data rate modes to the DSSS (Direct Sequence Spread Spectrum) already defined in the original 802.11 standard
802.11dEnhancement to 802.11a and 802.11b that allows for global roamingParticulars can be set at MAC layer
802.11eEnhancement to 802.11 that includes quality of service (QoS) featuresFacilitates prioritization of data, voice and video transmissions
802.11gExtends the maximum data rate of WLAN devices that operate in the 2.4 GHz band, in a fashion that permits interoperation with 802.11b devicesUses OFDM Modulation (Orthogonal FDM)Operates at up to 54 megabits per second (Mbps), with fall-back speeds that include the “b” speeds
802.11hEnhancement to 802.11a that resolves interference issues Dynamic frequency selection (DFS)Transmit power control (TPC)
802.11iEnhancement to 802.11 that offers additional security for WLAN applications Defines stronger encryption, authentication and key exchange, as well as options for key caching and pre-authentication
802.11jJapanese regulatory extensions to 802.11a specification. Frequency range 4.9 GHz to 5.0 GHz
802.11kRadio resource measurements for networks using 802.11 family specifications
802.11mMaintenance of 802.11 family specificationsCorrections and amendments to existing documentation
802.11nHigher-speed standards.
802.11xMisused “generic” term for 802.11 family specifications
802.12Demand PriorityDisbanded
802.13Not usedNot used
802.14Cable modemsDisbanded
802.15Wireless Personal Area NetworksCommunications specification that was approved in early 2002 by the IEEE for wireless personal area networks (WPANs).
802.15.1BluetoothShort range (10 m) wireless technology for cordless mouse, keyboard and wireless headphones at 2.4 GHz.
802.15.3aUWBShort-range, high-bandwidth “ultra wideband” link
802.15.4ZigBeeShort-range wireless sensor networks
802.15.5Mesh NetworkExtension of network coverage without increasing the transmit power or the receiver sensitivityEnhanced reliability via route redundancyEasier network configuration  – Better device battery life
802.16Wireless Metropolitan Area NetworksHibernating. This includes Fixed and Mobile Broadband Wireless Access techniques that are used to establish Wireless Metropolitan Area Networks. Connects Base Stations to the Internet utilising OFDM in unlicensed (900 MHz, 2.4, 5.8 GHz) or licenced (700 MHz, 2.5 – 3.6 GHz) frequency bands. Products that use 802.16 standards may be tested for WiMAX certification.
802.17Resilient Packet RingDisbanded
802.18Radio Regulatory TAGSupports IEEE 802 LMSC and IEEE 802 wireless Working Groups. Actively participates in and monitors radio regulatory matters.
802.19CoexistenceMakes standards for coexistence between different wireless standards for unlicensed devices.
802.20Mobile Broadband Wireless AccessDisbanded
802.21Media Independent HandoffHibernating. Enables optimization of upper layer services. This covers IoT and changeover services — especially between IEEE 802 networks.
802.22Wireless Regional Area NetworkHibernating. Creates a standard to enable spectrum sharing.
802.23Emergency Services Working GroupDisbanded
802.24Vertical Applications Technical Advisory Group (TAG)Focused on application categories which employ IEEE 802Standards, or use numerous work groups. For these, 802.24 operates as a point of contact with other groups focusing on other IEEE 802 standards. 802.24 can also act as a resource for learning the IEEE 802 standards by publishing white papers and other resources.

Broadcast network have single communication channel that is shared by all the users on network.

LayerCommunication Channel
Physical LayerRepeater Hub Multiplexing
Data Link LayerBridge Switch
Network LayerRouter Subnet Switch
Transport LayerGateway
ApplicationFTP | SMTP etc
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