Cat 6 is a type of Ethernet cable used for networking and internet connections. It supports high-speed data transmission, capable of handling frequencies up to 250 MHz. This makes it suitable for applications like streaming video, online gaming, and large file transfers. The Cat 6 cable can transmit data at speeds of up to 10 Gbps over short distances, typically up to 55 meters. It is an improvement over its predecessor, Cat 5e, offering better performance and reduced interference, making it a popular choice for both home and business networks.