In computer networking, Fast Ethernet physical layers carry traffic at the nominal rate of 100 Mbit/s. The prior Ethernet speed was 10 Mbit/s. Of the Fast Ethernet physical layers, 100BASE-TX is by far the most common.
Fast Ethernet was introduced in 1995 as the IEEE 802.3u standard[1] and remained the fastest version of Ethernet for three years before the introduction of Gigabit Ethernet.[2] The acronym GE/FE is sometimes used for devices supporting both standards.[3]