What does Network Access Control do? from fieldengineer's blog

network access controlis a tool for defining and implementing rules. These rules specify which users and devices can access the network through a set of protocols and policies. In most cases, the NAC system is designed to prohibit unauthorized and unsupported devices from accessing the network. Based on many factors, such as system status or role-based variables, NAC allows you to deny or allow access to the network. Network access control is a centralized endpoint security method that emphasizes network visibility and restricted access management through policy enforcement. Across all users and devices. NAC is designed to perform as the name suggests to control network access. Network access management aims to restrict unauthorized devices or users from entering the corporate private network. Consistent with corporate networks, network access control provides visibility, access control, and security. Network access control can help organizations identify and implement strict controls to manage access, meet security standards, reduce manual labor, and prevent data leakage. How does NAC work? Network access control is a tool for defining and implementing rules. These rules specify which users and devices can access the network through a set of protocols and policies. In most cases, the NAC system is designed to prohibit unauthorized and unsupported devices from accessing the network. Based on many factors, such as system status or role-based variables, NAC allows you to deny or allow access to the network. NAC helps to identify task-based network access policies within the enterprise and implement them. Therefore, NAC must be configured so that employees can only access the data needed to complete their job functions. NAC is a two-stage process: authentication and authorization. If any stage fails, it will lock and isolate the device or user. The NAC system will prompt the user to enter credentials during authentication to verify their identity as an authorized user. Enterprises can use various forms of authentication, such as user name or password, PIN, biometric scanning, etc., and then NAC approves access based on local access policies after authentication. If the user or computer is authorized by the access policy, then grant access. If it is not, access is denied.