10Base100 is not a standard Ethernet term; it appears to be a confusion of two different standards: 10Base-T and 100Base-TX. 10Base-T refers to Ethernet that transmits data at 10 Mbps over twisted pair cables, while 100Base-TX operates at 100 Mbps. Both standards use similar cabling but differ in speed and signaling. In networking, accurate terminology is important to avoid confusion between the various Ethernet standards.