IEEE 802.3 is a collection of IEEE standards defining the physical layer and the media access control (MAC) sublayer of the data link layer of wired Ethernet. This is generally a LAN technology with some WAN applications. Physical connections are made between nodes and/or infrastructure devices (hubs, switches, routers) by various types of copper or fiber cable. The Institute of Electrical and Electronics Engineers or IEEE (pronounced as eye-triple-ee) is an international non-profit, professional organization incorporated in the State of New York, United States. ... The physical layer is level one in the seven level OSI model of computer networking. ... media access control is where people try to access a control to the media. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Ethernet is a large and diverse family of frame-based computer networking technologies for local area networks (LANs). ... Local area network scheme A local area network (LAN) is a computer network covering a local area, like a home, office, or group of buildings. ... Wan is a Chinese abbreviation for the province of Anhui in China. ... 4 port NETGEAR ethernet hub An Ethernet hub or concentrator is a device for connecting multiple twisted pair or fibre optic Ethernet devices together, making them act as a single segment. ... A modular network switch with 3 network modules (a total of 24 Ethernet and 14 Fast Ethernet ports) and one power supply. ... A D-Link Wi-Fi NAT router, popular for home and small office networks A router is a computer networking device that forwards data packets across a network toward their destinations, through a process known as routing. ... A bundle of optical fibers. ...

802.3 is a technology that can support the IEEE 802.1 network architecture. IEEE 802. ...

The maximum packet size is 1518 bytes, although to allow the Q-tag for Virtual LAN and priority data in 802.3ac it is extended to 1522 bytes. If the upper layer protocol submits a PDU (Protocol data unit) less than 64 bytes, 802.3 will pad the data field to achieve the minimum 64 bytes. A packet is the fundamental unit of information carriage in all modern computer networks that use packet switching. ... A virtual LAN, commonly known as a vLAN or as a VLAN, is a logically-independent network. ... In telecommunications, the term protocol data unit (PDU) has the following meanings: Information that is delivered as a unit among peer entities of a network and that may contain control information, address information, or data. ... A byte is commonly used as a unit of storage measurement in computers, regardless of the type of data being stored. ...

Although it is not technically correct, the terms "packet" and "frame" are used interchangeably. The ISO/IEC 8802-3 ANSI/IEEE 802.3 Standards refer to MAC sub-layer frames consisting of the Destination Address, Source Address, Length/Type, data, and FCS fields. The Preamble and SFD are (usually) considered a header to the MAC Frame. This header plus the MAC Frame constitute a "Packet". A packet is the fundamental unit of information carriage in all modern computer networks that use packet switching. ... In telecommunications, a frame is a packet which has been encoded for transmission over a particular link. ... A frame check sequence (FCS) refers to the extra checksum characters added to a Frame in a communication protocol for error detection and correction. ... Start Frame Delimiter (SFD) refers to the 8-byte preambles last octet of an ethernet frame. ...

The original Ethernet is called "Experimental Ethernet" today. It was developed by Robert Metcalfe in 1972 (patented in 1978) and was based in part on the wireless ALOHAnet protocol. It is not in use anywhere, but is thought to be the only Ethernet by some purists. The first "Ethernet" that was generally used outside Xerox was the DIX Ethernet. However, as DIX Ethernet was derived from Experimental Ethernet, and as many standards have been developed that are based on DIX Ethernet, the technical community has accepted the term Ethernet for all of them. Therefore, the term "Ethernet" can be used to name networks using any of the following standardized media and functions: Robert Metcalfe (born 1946 in Brooklyn, New York) is an American technology pioneer who invented Ethernet, founded 3Com and formulated Metcalfes Law. ... ALOHAnet was a pioneering computer networking system developed at the University of Hawaii. ...

What is defined in earlier IEEE 802.3 standards is often confused for what is used in practice: most network frames you will find on an Ethernet will be DIX frames, since the Internet protocol suite will use this format, with the type field set to the corresponding IETF protocol type. IEEE 802.3x-1997 allows the 16-bit field after the MAC addresses to be used as a type field or a length field, so that DIX frames are also valid 802.3 frames in 802.3x-1997 and later versions of the IEEE 802.3 Ethernet standard. A megabit per second (mbps or mbit/s) is a unit of data transmission equal to 1,000 kilobits per second or 1,000,000 bits per second. ... The Internet protocol suite is the set of communications protocols that implement the protocol stack on which the Internet and most commercial networks run. ... 10BASE5 vampire tap Medium Attachment Unit (Transceiver) 10BASE5 (also known as thicknet) is the original full spec variant of Ethernet cable, using RG-8 (Radio Grade - 8) coaxial cable. ... 10BASE2 cable showing BNC Connector end. ... 10Broad36 is an obsolete standard for carrying 10 Mbit/s Ethernet signals over standard 75 ohm CATV cable over a 3600 meter range. ... (Redirected from 1BASE5) StarLAN was the first implementation of Ethernet computer networking on twisted pair wiring. ... 10BASE-T cable 10BASE-T cable and jackll 10BASE-T is an implementation of Ethernet which allows stations to be attached via twisted pair cable. ... (Redirected from 10BASE-F) Ethernet is a frame-based computer networking technology for local area networks (LANs). ... 100BASE-TX is the predominant form of Fast Ethernet, providing 100 Mbit/s Ethernet. ... (Redirected from 100BASE-T4) Ethernet is a frame-based computer networking technology for local area networks (LANs). ... 100BASE-FX is a version of fast ethernet over optical fiber. ... Autonegotiation (formerly NWay) is an Ethernet procedure for the automatic handshaking of two directly networked interfaces connected by identical parameters. ... -1... The 1000Base-X uses fibre-optic - both 1000Base-SX and 1000Base-LX use two pairs of fibre-optic. ... 1000BASE-T or IEEE 802. ... IEEE 802. ... A virtual LAN, commonly known as a VLAN, is a logically segmented network mapped over physical hardware. ... Link aggregation is a computer networking term which describes using multiple Ethernet network cables/ports in parallel to increase the link speed beyond the limits of any one single cable or port. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... A PoE injector (PSE) puts power into the cable and a PoE power splitter (PD) draws power from the cable. ... Ethernet in the First Mile, also known as IEEE 802. ... A 10-gigabit Ethernet protocol using 4-laned copper InfiniBand connectors. ... 10GBASE-T is a standard proposed by the IEEE 802 committee to provide 10 Gigabit/second connections over conventional unshielded twisted pair cables. ... A backplane is a circuit board (usually a printed circuit board) that connects several connectors in parallel to each other, so that each pin of each connector is linked to the same relative pin of all the other connectors, forming a computer bus. ... Close-up photo of one side of a motherboard PCB, showing conductive traces, vias and solder points for through-hole components on the opposite side. ... 10 gigabit Ethernet or 10GbE is the most recent (as of 2006) and fastest of the Ethernet standards. ... Congestion is a state of excessive accumulation or overfilling or overcrowding. ... A PoE injector (PSE) puts power into the cable and a PoE power splitter (PD) draws power from the cable. ... The Internet protocol suite is the set of communications protocols that implement the protocol stack on which the Internet and most commercial networks run. ...

See also

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• IEEE 802
• IEEE 802.1, the network architecture
• IEEE 802.11, the corresponding set of Wireless Ethernet standards

IEEE 802 refers to a family of IEEE standards about local area networks and metropolitan area networks. ... IEEE 802. ... IEEE 802. ...

References

This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL. The Free On-line Dictionary of Computing (FOLDOC) is an online, searchable encyclopedic dictionary of computing subjects. ... GNU logo (similar in appearance to a gnu) The GNU Free Documentation License (GNU FDL or simply GFDL) is a copyleft license for free content, designed by the Free Software Foundation (FSF) for the GNU project. ...

External links

• http://www.ieee802.org/3/ -- The IEEE 802.3 Working Group
• Get IEEE 802.3 LAN/MAN CSMA/CD Access Method -- Download 802.3 specifications.