What is a primary benefit of employing Network Access Control (NAC)?

Preventing unauthorized device access to the network is indeed a primary benefit of employing Network Access Control (NAC). NAC solutions are designed specifically to enforce security policies by restricting access to network resources based on the device's compliance with security standards. This helps to ensure that only authenticated and authorized devices can connect to the network, thereby minimizing the risk of security breaches. By controlling which devices are able to access the network, organizations can significantly increase their overall security posture and protect sensitive data from potential threats posed by unauthorized devices.

While other options may represent advantages that can be associated with NAC, such as enhanced visibility, improved performance, or centralized management, the core function of a NAC solution fundamentally revolves around controlling and preventing unauthorized access, which is essential for maintaining network security.