Exam PT0-002 topic 1 question 349 discussion

Reversal is worse case compared to known as in reversal the the environment is known AND the target will never be informed of how and when the test will be conducted. Problem is its not in the book but you have to read the OSSTM v3 manual, the pdf link is in the book but the link is dead. If you search it, its on GitHub. Here is an extract on Reversal , The Analyst engages the target with full knowledge of its processes and operational security, but the target knows nothing of what, how, or when the Analyst will be testing. The true nature of this test is to audit the preparedness of the target to unknown variables and vectors of agitation. The breadth and depth depends upon the quality of the information provided to the Analyst and the Analyst’s applicable knowledge and creativity.

I think B this time. Worst conditions. D is not worst

It would come down to your definition of worst case. If worst condition is the hacker has all knowledge and information then the answer would be D. If its a fragile system then the answer would be B. The Reversal testing methodology is typically used to simulate testing under the worst or most adverse conditions. This approach involves intentionally reversing the expected conditions to see how a system performs under stress or in failure scenarios, making it ideal for assessing system resilience in challenging situations. B. Reversal: Tests the reversal of changes or operations, often focusing on rollbacks or error corrections. D. Known Environment Testing: Operates with full knowledge of the system’s architecture, tools, and software, simulating a scenario where testers have complete information.

Known environment testing can simulate a worst-case scenario, where an attacker has gained access to sensitive information or insider knowledge about the target, and can exploit it to launch more sophisticated or targeted attacks. A known environment testing can also help identify the most critical or high-risk areas of the target, and provide recommendations for improving its security posture. The other options are not OSSTM testing methodologies that should be used to test under the worst conditions.

I would go with D. Known environment simulates worst case scenario for the target system.