Network Access Control (NAC) is a security approach that regulates which devices and users can connect to a network. It checks factors such as device identity, user credentials, security status, and access policies before granting connectivity. Based on these checks, NAC can allow, restrict, or isolate devices, helping organizations control network access and reduce exposure to unauthorized or potentially compromised endpoints.
For example, a company can require employees’ laptops to meet security requirements before they can access internal systems, while placing unknown devices on a restricted network. This helps prevent unauthorized access and limits security risks. NAC is commonly used in corporate networks, healthcare environments, educational institutions, industrial facilities, and other organizations managing many connected devices.
