Question 830
A medical device uses MAB but receives an unrestricted production VLAN because a default authorization rule is too broad. Which observed result BEST confirms that the security requirement is met?
Explanation
Correct Answer
An enrolled printer communicates only with approved print services while an unknown MAC does not gain employee privileges. This is an observable acceptance condition, rather than an assumption that enabling a feature alone proves security. MAB relies on spoofable MAC identity and should be treated as lower-assurance admission, not an equivalent replacement for EAP-TLS. Situation: A medical device uses MAB but receives an unrestricted production VLAN because a default authorization rule is too broad.
Incorrect Answers
A device that fails posture moves to remediation or disconnects under the updated policy without requiring a full network restart. This outcome tests CoA session reauthorization by Cisco ISE and is not sufficient proof of the stated requirement. Here the relevant validation is: An enrolled printer communicates only with approved print services while an unknown MAC does not gain employee privileges. Situation: A medical device uses MAB but receives an unrestricted production VLAN because a default authorization rule is too broad.
A supported supplicant joins the assigned network only after successful authentication and policy assignment. This outcome tests 802.1X port-based access with Cisco ISE and is not sufficient proof of the stated requirement. Here the relevant validation is: An enrolled printer communicates only with approved print services while an unknown MAC does not gain employee privileges. Situation: A medical device uses MAB but receives an unrestricted production VLAN because a default authorization rule is too broad.
Correlated suspicious activity creates a reviewable incident and only authorized containment actions execute under tested automation. This outcome tests SIEM and SOAR workflow distinction and is not sufficient proof of the stated requirement. Here the relevant validation is: An enrolled printer communicates only with approved print services while an unknown MAC does not gain employee privileges. Situation: A medical device uses MAB but receives an unrestricted production VLAN because a default authorization rule is too broad.


