Fast Ethernet covers any of a number of 100Mbps Ethernet specifications. Fast Ethernet offers a speed increase of 10 times over that of the 10BaseT Ethernet specification, while preserving frame format, MAC (Medium Access Control) mechanisms, and MTU (Maximum Transmission Unit). Such similarities allow the use of existing 10BaseT applications and network management tools on Fast Ethernet networks. The protocol is based on an extension to the IEEE (Institute of Electrical and Electronics Engineers) 802.3 specification.
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