This Dell Networking Cable, 100GbE QSFP28 to QSFP28, Passive Copper Direct Attach Cable is used to link your fiber networking devices for high-speed, long-distance connectivity. This 5 m cable features an QSFP28 connector at one end and QSFP28 connector at the other end. This product is compatible with the following systems:- Dell Networking S6100- Dell Networking Z9100- PowerEdge C4140- PowerEdge C6420- PowerEdge R640- PowerEdge R740- PowerEdge R740XD- PowerEdge R940