100BaseT <networking> Any of several {Fast Ethernet} 100 {MBps} {CSMA/CD} standards for {twisted pair} cables, including: 100BaseTx (100 Mbps over two-pair {Cat5} or better cable), 100BaseT4 (100 Mbps over four-pair {Cat3} or better cable), 100BaseT2 (in committee; 100 Mbps over two-pair Cat3 or better cable). All are standards (or planned standards) under {IEEE} {802.3}. (1997-01-07)