Network Access Control (NAC) is a security solution that controls and manages access to a network based on predefined security policies. It ensures that only authorized devices and users can connect to the network, and it can enforce compliance with security requirements such as antivirus software, encryption, and security patches. NAC solutions help protect against unauthorized access and potential security threats by continuously monitoring and assessing devices attempting to access the network. Learn more: https://en.wikipedia.org/wiki/NAC