关键词：网络接口卡；NIC；网络协议栈
摘 要：As the main gateway for network traffic to a server, the network interface card (NIC) is an ideal place to incorporate diverse network functionality, such as traffic control, protocol offloading, and virtualization. However, the slow evolution and inherent inflexibility of NIC hardware have failed to support evolving protocols, emerging applications, and rapidly changing system/network architectures. The traditional software approach to this problem—implementing NIC features in the host network stack—is unable to meet increasingly challenging performance requirements.