ETU-LINK 100G QSFP28 DAC is a direct attach copper cable that operates at a speed of 100Gbps. It is packaged in the QSFP28 form factor and consists of four channels, with each channel transmitting at a rate of 25Gbps. The 100G QSFP28 DAC is a high-bandwidth, low-latency, and low-power solution designed for connecting devices in data centers and servers.