Description Cisco QDD-4ZQ100-CU1M Compatible 1m (3ft) 400G QSFP-DD to 4X100G QSFP56 Passive DAC Breakout Cable offers a 30AWG high-density copper link optimized for Cisco networking platforms. It facilitates the distribution of a 400Gbps port into four 100Gbps QSFP56 lanes, ensuring high signal integrity for adjacent rack connectivity. This cable provides a power-efficient and cost-effective solution for Cisco-based high-speed data center fabrics.