NAC, or Network Access Control, is a security technology used to regulate and manage access to computer networks. It refers to a set of protocols, policies, and practices implemented to ensure that only authorized devices and users can connect to a network, thereby enhancing network security.
NAC operates by enforcing security policies at the network perimeter, before allowing devices to connect. This technology usually involves a combination of hardware and software components working together to authenticate, authorize, and evaluate devices and users attempting to access the network. It employs various techniques such as authentication servers, firewalls, and endpoint security agents to protect the network from unauthorized access.
NAC allows organizations to define granular access levels, ensuring that only devices and users with the necessary privileges gain access to specific resources, applications, or segments of the network. It enables IT administrators to enforce security policies, restrict access to vulnerable or infected devices, and monitor network activity. This technology also facilitates compliance with industry regulations by providing visibility into network users, their actions, and the devices they are using.
In summary, NAC is a network security technology that permits organizations to control and manage access to their networks. By implementing NAC, businesses can enhance their network's protection against unauthorized access, mitigate security risks, and maintain compliance with applicable regulations.
