The IBM EC2S adapter is a cutting-edge network interface card designed to meet the high-speed networking requirements of modern data centers and enterprise environments. This PCIe 3.0 compliant adapter features two ports capable of delivering up to 10 Gbps of bandwidth each, providing a high-throughput, low-latency solution for network traffic. The EC2S supports both Ethernet networking and RDMA over Converged Ethernet (RoCE), allowing for highly efficient data transfers with reduced CPU overhead. RDMA (Remote Direct Memory Access) enables direct memory access from the memory of one computer into that of another without involving either one's operating system. This capability makes it particularly suitable for high-performance computing, storage, and networking applications. The adapter is also compatible with both SR (short reach) optical connections and direct-attach copper (Cu), offering flexibility in connecting to different types of network infrastructure. Its advanced features such as Quality of Service (QoS), VLAN tagging, and jumbo frames support, make it an ideal choice for businesses looking to optimize their network performances and reduce operational costs.