50G QSFP28 DAC (Direct-attach Cable) cable assembly offers a cost-effective way to establish 505 link connectivity between devices using QSFP28. The 50G QSFP28 passive copper cable is designed for 50Gb/s high-speed interconnecting networking applications such as data centers and high-performance computing (HPC), storage networks, etc. It is fully compliant with QSFP28 Multi-Source Agreement (MSA). AscentOptics could provide high performance 50G QSFP28 passive copper cables (length range from 0.5 meter to 5 meters) that is widely used for short-distance connections and offers a 50 Gigabit link between QSFP28 ports of switches inside racks and adjacent racks.