Question 950
An access controller accepts a staff user from RADIUS but assigns the guest role because the expected role attribute is absent. Which first diagnostic check is most useful before changing the network?
Explanation
Correct Answer
This check collects evidence at the layer implicated by the symptom: successful authentication alone does not guarantee the intended network authorization attributes. Examine the evidence before choosing the corrective change.
Incorrect Answers
This would be a reasonable check when a lab's headless sensors cannot run an 802.1X supplicant, and technicians propose allowing every unknown MAC to bypass access control, but is less direct for the issue at hand: successful authentication alone does not guarantee the intended network authorization attributes.
This would be a reasonable check when a campus AAA deployment has two RADIUS servers, but requests continue timing out because both hostnames resolve to the same failed address, but is less direct for the issue at hand: successful authentication alone does not guarantee the intended network authorization attributes.
This would be a reasonable check when a client presents a valid EAP-TLS certificate but its EKU or identity mapping does not meet the enterprise admission rule, but is less direct for the issue at hand: successful authentication alone does not guarantee the intended network authorization attributes.