Testing must validate segmentation and scope-reduction controls. Which statement is true?

Testing must validate segmentation and scope-reduction controls. Which statement is true?

• A. Not Required
• B. Only For New Systems
• C. Only If Segmentation Exists
• D. Must Be Tested

Answer: (D)

Segmentation and scope reduction must be validated through testing to prove they actually work. If you use network segmentation to limit the Cardholder Data Environment (CDE), you’re not done by simply configuring devices—you have to confirm those controls keep the CDE isolated. A penetration test is used to verify there are no misconfigurations, bypasses, or pathways that could allow access from non-secure parts of the network into the CDE. This validation is required at least annually and after any significant change to the segmentation controls, ensuring the reduced scope remains accurate over time. That’s why “Must Be Tested” is the best answer. The other options imply testing is optional, limited to new systems, or only applicable if segmentation exists, which isn’t correct: testing segmentation controls is a mandatory part of validating PCI scope reduction whenever segmentation is used, and it isn’t restricted to new systems or to the existence of segmentation alone.

Segmentation and scope reduction must be validated through testing to prove they actually work. If you use network segmentation to limit the Cardholder Data Environment (CDE), you’re not done by simply configuring devices—you have to confirm those controls keep the CDE isolated. A penetration test is used to verify there are no misconfigurations, bypasses, or pathways that could allow access from non-secure parts of the network into the CDE. This validation is required at least annually and after any significant change to the segmentation controls, ensuring the reduced scope remains accurate over time.

That’s why “Must Be Tested” is the best answer. The other options imply testing is optional, limited to new systems, or only applicable if segmentation exists, which isn’t correct: testing segmentation controls is a mandatory part of validating PCI scope reduction whenever segmentation is used, and it isn’t restricted to new systems or to the existence of segmentation alone.