<P> Ethernet over twisted pair technologies use twisted - pair cables for the physical layer of an Ethernet computer network . They are a subset of all Ethernet physical layers . </P> <P> Early Ethernet had used various grades of coaxial cable, but in 1984, StarLAN showed the potential of simple unshielded twisted pair . This led to the development of 10BASE - T and its successors 100BASE - TX, 1000BASE - T and 10GBASE - T, supporting speeds of 10, 100 Mbit / s and 1 and 10 Gbit / s respectively . </P> <P> All these standards use 8P8C connectors, and the cables from Cat 3 to Cat 8 have four pairs of wires; though 10BASE - T and 100BASE - TX only use two of the pairs . </P> <P> The Institute of Electrical and Electronics Engineers (IEEE) standards association ratified several versions of the technology . The first two early designs were StarLAN, standardized in 1986, at one megabit per second, and LattisNet, developed in January 1987, at 10 megabit per second . Both were developed before the 10BASE - T standard (published in 1990 as IEEE 802.3 i) and used different signalling, so they were not directly compatible with it . </P>

When used for ethernet unshielded twisted pair uses what type of connector