The 802.1x authentication mechanisms can be employed to limit IP-based IoT device access to a network. Note though that not all IoT devices rely on the provisioning of an IP address. While it cannot accommodate all IoT device types, implementing 802.1x is a component of a good access control strategy able to address many use cases.
Enabling 802.1x authentication requires an access device and an authentication server. The access device is typically an access point and the authentication server can take the form of a RADIUS or some Authentication, Authorization, and Accounting (AAA) server.
