Any of several Fast Ethernet 100 MBpsCSMA/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 committee100 Mbps over two-pair Cat3 or better cable).All are standards (or planned standards) under IEEE802.3.(1997-01-07)