The Flex System CN4052S 2-port 10Gb Virtual Fabric Adapters are part of the VFA 5.2 family of System x and Flex System adapters. Each physical 10 GbE port can be divided into four virtual NIC (vNIC) devices per port (for a total of 8 for the CN4052S), with flexible bandwidth allocation. These adapters also feature RDMA over Converged Ethernet (RoCE) capability, and support iSCSI, and FCoE protocols with the addition of a Features on Demand (FoD) license upgrade.