The NVIDIA/Mellanox QSFP-4SFP25G-CU1M Compatible QSFP28 to 4x 25G SFP28 Direct Attach Cable utilizes passive copper technology, ensuring reliable connectivity without the need for additional power. This cable provides a cost-effective solution for interconnecting equipment within a close range, such as telecom operator equipment rooms or data centers. It offers a seamless connection between a 100G QSFP28 port and four 25G SFP28 ports, meeting the requirements of industry standards IEEE 802.3bj, SFF-8402, and SFF-8665.