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Ethernet has continued to evolve from the 10BASE2 flavor capable of speeds up to 185 Mbps to the newest 10GigE (10 Gigabit Ethernet) capable of speeds up to 10 Gbps. Since 1985, IEEE has continued to upgrade the 802.3 standards to provide faster speeds without changing the underlying frame structure. This feature, among others, has made Ethernet the choice for LAN implementations worldwide. Today we review Ethernet technologies and operation at both the data link and physical layer.

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