Turn a single 400G uplink into four 100G connections without adding optics, patch panels, or extra conversion layers. This 3 m active copper breakout cable is designed for Arista-compatible environments that need clean, short-reach fan-out between switches, servers, and aggregation points. The QSFP-DD to 4 x QSFP format is a practical choice for teams standardizing on 100G access while preserving 400G uplink capacity at the spine or core. Active copper helps maintain signal integrity across the cable run, making it a strong fit for dense racks where direct attach is preferred over optical transceivers. For infrastructure teams, the value is control: fewer components to source, fewer failure points to manage, and a direct path from 400G aggregation to four 100G endpoints. That makes this cable especially useful in environments where port economics matter and predictable short-distance connectivity is worth more than over-specifying the link.