Question 80
A customer has stale machine account certificates with expired owners. What observation would best confirm the intended security outcome?
Explanation
Correct Answer
A retired certificate fails authentication and replacement remains valid. This answer directly addresses the described constraint. Key and certificate hygiene prevents service interruption and untrusted identity reuse. Successful validation requires: A retired certificate fails authentication and replacement remains valid.
Incorrect Answers
That relates to a different issue: A service exposes its administrative interface to every network segment. Limiting reachability reduces opportunities for credential and service abuse. That is not a direct remedy for the requested outcome: A retired certificate fails authentication and replacement remains valid. The relevant evidence is: A retired certificate fails authentication and replacement remains valid.
It would address a production app stores an API key in a publicly readable deployment manifest. The relevant reason in that case is: Secret revocation is necessary after disclosure; merely hiding a file is insufficient. Here the required success condition is a retired certificate fails authentication and replacement remains valid. The relevant evidence is: A retired certificate fails authentication and replacement remains valid.
This result applies to a different case: An endpoint runs an exploitable version of a server component with an available vendor fix. Correcting the vulnerable version addresses the observed root cause. It does not establish the present requirement, where a retired certificate fails authentication and replacement remains valid. The relevant evidence is: A retired certificate fails authentication and replacement remains valid.