Thursday, March 11, 2010


Fast Ethernet / 100BASE-T / 802.3u
Fast Ethernet is also referred to as 100BASE-T or 802.3u and is a communications protocol that enables computers on a local-area network to share information with one another at rates of 100 million bits per second instead of the standard 10 million BPS. Fast Ethernet works over Category 5 twisted-pair wiring.
There are two available types of 100BASE-T standards. The first standard known as 100BASE-T utilizes CSMA/CD. The second standard, known as 100VG-AnyLAN or 802.12, is similar to the other standard; however, it utilizes a different type of Ethernet frame to send its data.
100BASE-T is available in three different types of cable technologies:
100BASE-T4 = Utilizes four pairs of telephone-grade twisted-pair wire and is used for networks that need a low-quality twisted-pair on a 100-Mbps Ethernet.
100BASE-TX = Developed by ANSI 100BASE-TX is also known as 100BASE-X, 100BASE-TX uses two wire data grade twisted-pair wire
100BASE-FX = Developed by ANSI, 100BASE-FX utilizes 2 stands of fiber cable.

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