The NETGEAR 40G QSFP+ to 40G QSFP+ 1-Meter Passive DAC Cable (AXLC761) is compatible with select Managed Switches such as M4500-32C (CSM4532), M4500-48XF8C (XSM4556) and M4300-96X (APM402XL port cards). With its passive QSFP+ connectors on both ends, the AXLC761 replaces QSFP+ fiber transceivers for low-latency, energy-efficient and transparent 40G short run (1 meter or 3.28 feet).