The ATTO FastFrame 4 N422 is a dual-port Ethernet SmartNIC. It supports 25 Gigabit Ethernet and 10 Gigabit Ethernet protocols, with data transfer rates up to 25 Gbps per port. This expansion module features two SFP28 connectors and utilizes a PCIe 3.0 x8 interface. It comes in a low-profile form factor and includes both full and half-height brackets. The SmartNIC supports RDMA over Converged Ethernet (RoCE) and various hardware/software offloads, including LRO, LSO, TSO, RSS, and TSS.