线缆长度 vs 性能
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线缆长度与可达到的最大速度或功率传输之间的权衡。
较长线缆遭受更多信号衰减。USB4在40 Gbps下无源传输限制在约0.8米；HDMI 2.1在3米以上开始降级；以太网Cat6a在100米内保持10 Gbps。有源线缆和光纤变体以更高成本延长可用长度。