The 40G Passive QSFP+ Twinaxial Direct Attach Cable is a high performance, high bandwidth and cost-effective connection solution that supports 40G Gigabit Ethernet. The 40G Passive QSFP+ Twinaxial Direct Attach Cable is designed to support high-density connections for switches with 40G interface, much faster than SFP+. There are three cable models, including the DEM-CB100QXS (one meter) and the DEM-CB300QXS (three meter). The DEM-CB100QXS-4XS QSFP+ to 4X SFP+ one-meter cable features a QSFP+ connector on one end, and four SFP+ connectors on the other end, allowing it to connect to up to four 10G servers. The 40G Passive QSFP+ Twinaxial Direct Attach Cable is certified to be compatible with D-Link products to provide you best performance and reliability.