If the “Alerts” tab in an access tracker entry shows the following error message: “Access denied by policy”, what could be a possible cause for authentication failure?
A. Configuration of the Enforcement Policy.
B. An error in the role mapping policy.
C. Failure to select an appropriate authentication method for the authentication request.
D. Implementation of a firewall policy on ClearPass.
E. Failure to find an appropriate service to process the authentication request.
A is correct