What is Network Access Control?

Network Access Control (NAC) is an approach to computer security that attempts to unify endpoint security technology (such as antivirus, host intrusion prevention, and vulnerability assessment), user or system authentication, and network security enforcement. NAC examines the state of a connected device to ensure it meets pre-defined security policies before granting network access. It is commonly used to prevent non-compliant devices from accessing a network, thereby reducing the risk of malware infections and data breaches.