Network Access Control (NAC) is a computer security strategy integrating endpoint security technologies, user authentication, and network security enforcement. It utilizes protocols to establish policies for securing initial device access to network nodes. NAC may include automatic remediation, fixing non-compliant nodes before granting access. This integration spans network infrastructure, ensuring secure system operation before interoperability. The 802.1X standard represents a basic NAC form. The primary goal is to control network access through policies, encompassing pre-admission endpoint security checks and post-admission controls on user and device network activities.