Ethernet cables are the core transmission medium that connects network devices. Their main function is to stably transmit network signals and adapt to different types of network speeds and scene requirements. The common network cable grades are divided from low to high according to transmission performance, with core differences in network speed, bandwidth, and anti-interference ability: Cat5e: a cost-effective choice, supporting 1Gbps network speed, 100MHz bandwidth, and better anti-interference ability than Cat5, preferred for home and ordinary office use. Cat6: Performance upgrade, supporting 1Gbps (up to 55 meters) or 10Gbps (up to 5 meters), bandwidth of 250MHz, with an internal cross skeleton to reduce interference, suitable for high-definition audio and video, e-sports and other scenarios with high network speed requirements. Cat6a: Enhanced version of Cat6, supporting 10Gbps network speed (up to 100 meters), bandwidth of 500MHz, stronger anti-interference ability, suitable for enterprise computer rooms, large apartments, and whole house high-speed networking. Cat8 is a high-end Ethernet cable that has been recognized by mainstream standards, is compatible with RJ45 interfaces, supports 25G-40Gbps ultra high speed short-range transmission, and is designed specifically for data centers and other scenarios.