In the evolution of twisted-pair cabling, CAT8 (Category 8 cable) represents the highest performance grade in current copper cable standards, specifically designed for short-distance, ultra-high bandwidth scenarios such as data centers and supercomputing centers. Compared to CAT7’s 1000MHz bandwidth and 100Gbps short-distance speed, CAT8 achieves stable 25Gbps/40Gbps transmission through doubled bandwidth and stricter parameter optimization, emerging as a "core competitor" between copper cables and optical fibers in short-distance applications. Below is a comprehensive analysis of CAT8’s parameter characteristics from dimensions including transmission performance, structural innovation, electrical parameters, and link design.