Network access control (NAC) is a security approach that enforces policies to control and manage access to network resources. It ensures that only authorized and compliant devices can connect to the network. NAC can be implemented through various technologies, such as the following:
802.1X Authentication: It provides port-based authentication, requiring users or devices to authenticate before accessing the network.
Network Admission Control (NAC) Systems: They enforce security policies by verifying the compliance and health status of devices before granting access.
Endpoint Security Solutions: They assess the security posture of devices and enforce security policies, such as antivirus and firewall requirements, before allowing network access.
Network Segmentation and VLANs: Network segmentation and VLANs separate network traffic based on security requirements, allowing for granular access control and isolation of different groups or types of devices.