Abstract: A system and method authenticating a client device transmitting a request to access a network that includes an authentication server to implement an authentication protocol for access to the network, and an authenticator to transmit identity credentials of the client device using the authentication protocol to the authentication server to perform authentication of the client device at the authentication server. The authenticator downloads credentials of the authenticated client device from the authentication server, determines, during a re-authentication period, whether the authentication server is available, and performs re-authentication of the client device using the downloaded credentials when the authentication server is determined not to be available.

Abstract: A system and device for determining authenticity of a client device transmitting a request to access a network that includes an authenticator to adjust authentication parameters for authentication requests to access a network from a client device, and access switches positioned within the authentication, each of the plurality of switches having an associated port for receiving the authentication requests. The authenticator monitors authentication requests received from the client device, determines whether a number of the monitored authentication requests that are failed authentication requests, and determines mobility of the client device during the monitored authentication requests. Authenticity of the client device is determined based on one of the determined number of failed authentication requests and the determined mobility of the client device.