Network Security Access Control System (NAC) by QI-ANXIN ensures terminal trustworthiness, security, and compliance. It leverages QI-ANXIN's technical advantages in terminal control and threat defense, along with extensive practical experience in large-scale terminal governance. NAC is designed to manage and control network access, ensuring that only authorized and compliant devices can connect to the network. It provides comprehensive security measures to protect against unauthorized access and potential threats, maintaining the integrity and security of the network infrastructure.