Ethernet is a family of wired computer networking technologies commonly used in local area networks, metropolitan area networks and wide area networks .
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Ethernet is a family of wired computer networking technologies commonly used in local area networks, metropolitan area networks and wide area networks .
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Ethernet has since been refined to support higher bit rates, a greater number of nodes, and longer link distances, but retains much backward compatibility.
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Over time, Ethernet has largely replaced competing wired LAN technologies such as Token Ring, FDDI and ARCNET.
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Original 10BASE5 Ethernet uses coaxial cable as a shared medium, while the newer Ethernet variants use twisted pair and fiber optic links in conjunction with switches.
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The Ethernet standards include several wiring and signaling variants of the OSI physical layer.
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Per the OSI model, Ethernet provides services up to and including the data link layer.
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Ethernet is widely used in homes and industry, and interworks well with wireless Wi-Fi technologies.
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Ethernet initially competed with Token Ring and other proprietary protocols.
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Ethernet was able to adapt to market needs and with 10BASE2, shift to inexpensive thin coaxial cable and from 1990, to the now-ubiquitous twisted pair with 10BASE-T.
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Since then, Ethernet technology has evolved to meet new bandwidth and market requirements.
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Ethernet has evolved to include higher bandwidth, improved medium access control methods, and different physical media.
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Ethernet establishes link-level connections, which can be defined using both the destination and source addresses.
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Ethernet frames are said to be self-identifying, because of the EtherType field.
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Ethernet was originally based on the idea of computers communicating over a shared coaxial cable acting as a broadcast transmission medium.
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Original Ethernet's shared coaxial cable traversed a building or campus to every attached machine.
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Bandwidth advantages, the improved isolation of devices from each other, the ability to easily mix different speeds of devices and the elimination of the chaining limits inherent in non-switched Ethernet have made switched Ethernet the dominant network technology.
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In 2016, Ethernet replaced InfiniBand as the most popular system interconnect of TOP500 supercomputers.
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Fiber optic variants of Ethernet are very popular in larger networks, offering high performance, better electrical isolation and longer distance .
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Notably, Ethernet packets have no time-to-live field, leading to possible problems in the presence of a switching loop.
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