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 committee 100 Mbps over two-pair Cat3 or better cable). All are standards (or planned standards) under IEEE802.3. (1997-01-07)