The 400G QSFP-DD to 2x200G QSFP56 DAC is a high-bandwidth breakout direct attach copper cable designed to split one 400G QSFP-DD port into two 200G QSFP56 connections. It is commonly used in data centers, AI clusters, high-performance computing, and switch-to-switch network connections where 400G uplinks need to be divided into two 200G links.
