The Network Gatekeeper: How NAC Enforces Security

How does a network ensure that only safe and authorized devices are allowed to connect? That's the job of Network Access Control (NAC). This article explains how NAC acts as a digital bouncer for a network. Before granting access, a NAC system checks a device's security posture to make sure it complies with security policies, such as having up-to-date antivirus software and the correct configurations. This is a key concept in enterprise security, ensuring that personal laptops, IoT devices, and guest phones don't introduce vulnerabilities into a secure corporate environment.