100Base-T - Computer Definition
An IEEE standard (802.3u, 1995) similar to 10Base-T, 100Base-T translates to 100 Mbps (theoretical transmission rate), Baseband (one transmission at a time over a single, shared channel), over Twisted pair media.The maximum segment length between the 100Base-T hub and the attached device (e.g., workstation or printer) originally was specified at 100 meters or less over four pairs of Cat 3 unshielded twisted pair (UTP). The predominant version is 100Base-TX, which extends the distance to 350 meters over two pairs of Cat 5e.The 100Base-T hub is a wire hub that serves as a multiport repeater, as well as a central point of interconnection. 100Base-T uses the 4B5B line coding technique. See also 4B/5B, baseband, Cat 3, Cat 5e, channel, Ethernet, IEEE, hub, repeater, standard, transmission rate, and UTP.
An Ethernet standard that transmits at 100 Mbps. Introduced in 1995 and officially the IEEE 802.3u standard, it is a 100 Mbps version of 10Base-T (10 Mbps Ethernet). Like 10Base-T, 100Base-T is a shared media LAN when used with a hub (all nodes share the 100 Mbps) and 100 Mbps between each pair of nodes when used with a switch. All modern Ethernet devices are at least 10/100, supporting both 100Base-T and 10Base-T (see 10/100 adapter). 100Base-T, 100Base-T4 and 100Base-TX 100Base-T uses two pairs of wires in Category 5 UTP cable, while 100Base-TX requires two pairs in Category 6 cable. 100Base-T4 uses all four wire pairs in older Category 3 cables. See 10Base-T and 100Base-FX.