What is Network Access Control (NAC)?

Network Access Control (NAC) is an approach to computer security that aims to secure a network by enforcing policies for devices before they are allowed to access the network. NAC solutions typically involve authentication, authorization, and posture assessment. This ensures that only compliant and trusted devices can gain access, reducing the risk of security threats from compromised or non-compliant endpoints. NAC is commonly used to control access based on user roles, device type, and security state, like antivirus status and patch levels.