Cat cables ( or Category cables) serve as the foundation for configuring ethernet networks. They allow for interconnection of servers, computers, routers, and switches. Each category consists of a set of twisted pair copper wires which differ in the amount of twists per inch, the number of pairs, and shielding. Twisting reduces crosstalk and electromagnetic interference, improving clarity of the signals sent. These cables are inexpensive and reliable, used in both residential and business networking. Cat cables advanced support multiple speeds of ethernet with older Cat3 cables supporting 10 Mbps and surpassing 10 Gbps with advanced Cat6a and Cat8.