What is the purpose of Network Access Control (NAC)?

Network Access Control (NAC) functions primarily to keep unauthorized users or devices from accessing a private network. It does this by enforcing security policies that determine which devices can connect based on their compliance with security requirements, such as updated antivirus software and operating system patches. NAC can evaluate the security posture of devices attempting to join the network and either grant them access or isolate them based on predetermined criteria.

This approach helps in maintaining a secure network environment by ensuring that only compliant and trusted devices are allowed access, thereby reducing the risk of security breaches, malware infections, and data leaks. NAC is an essential component in modern network security since it provides a systematic and automated way of managing device access dynamically.