Who is IEEE 802 Family?

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Dec 2, 2000

IEEE is the abbreviation of 'Institute of Electrical and Electronic Engineers'. This organization was introduced in February 1980. That's why, 802 means the '1980 and 2nd month'. IEEE is the largest professional organization in the world and is extremely influential with regard to setting standards. The 802 committee of the IEEE, for example, has developed a series of standards for LANs and WANs. The IEEE standards govern lower-layer protocols and interaction with transmission media. These standards have been recognized and reissued by the ISO as the ISO 802 standards. Twelve subcommittees oversee the 802 standards. (Recently, the thirteenth committee has been proposed for the development of the most popular 100BaseX standard). Lets have an outlook on the 802 standards according to the OSI Model.

IEEE 802.2
IEEE 802.3
IEEE 802.4
IEEE 802.5
IEEE 802.6
IEEE 802.9
IEEE 802.11
IEEE 802.12

IEEE 802.2

The IEEE 802.2 standard defines an LLC (Logical Link Control sublayer of Data Link layer of the OSI Model) that is used by other lower-layer protocols. Because these lower-layer protocols can use a single LLC protocol layer, Network layer protocols can be designed independently of both the network's Physical layer and MAC (Media Access Control sublayer of Data Link layer of the OSI model) implementations. The LLC appends to packets a header that identifies the upper layer protocols associated with the frame. This header also declares the processes that are the source and destination of each packet.

IEEE 802.3

The IEEE 802.3 standard defines a network derived from the Ethernet network originally developed by Digital, Intel, and Xerox. This standard defines characteristics related to the MAC sublayer of the Data Link layer and the OSI Physical layer. With one minor distinction -- frame type -- IEEE 802.3 Ethernet functions identically to DIX Ethernet v.2. These two standards can even coexist on the same cabling system, although devices using one standard cannot communicate directly with devices using the other. The MAC sublayer uses a type of connection access called 'Carrier Sense Multiple Access with Collision Detection' (CSMA/CD). This technique reduces the incidence of collision by having each device listen to the network to determine whether it's quiet ("carrier sensing"); a device attempts to transmits only when the network is quiescent. This reduces but doesn't eliminate collisions because signals take some time to propagate through the network. As devices transmit, they continue to listen

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