The 40G Passive QSFP+ Twinaxial Direct Attach Cable is a high performance, highbandwidth and cost-effective connection solution that supports 40G Gigabit Ethernet.The 40G Passive QSFP+ Twinaxial Direct Attach Cable is designed to support high-densityconnections for switches with 40G interface, much faster than SFP+. There are three cablemodels, 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 onone end, and four SFP+ connectors on the other end, allowing it to connect to up to four 10Gservers. The 40G Passive QSFP+ Twinaxial Direct Attach Cable is certified to be compatible