These modules QSFP transceiver module iwappable

The transceiver is used primarily in short reach applications in switches, routers, and data center equipment where it provides higher density than QSFP transceiver link length for either 40 Gigabit Ethernet or high density 10 Gigabit Ethernet application is up The QSFP transceivers are great a solution for multi-lane data communication and interconnect applications. In addition to Read this installation guide carefully before you install a QSFP transceiver module or cable to prevent damage to the component. 40Gbps Ethernet interconnects, it can be used in datacom/telecom switch, and router connections, as well as data aggregation and backplane applications.
It primarily enables high-bandwidth 40G optical links over ribbon fiber cables terminated with multi-fiber connectors, and could also be used along with ribbon to duplex fiber breakout cables for connectivity