What is the purpose of network segmentation in PCI DSS?
A.To increase network speed
B.To isolate the CDE from other networks, reducing the number of systems in scope for PCI DSS and limiting potential attack paths to cardholder data
C.To create separate networks for each department
D.To comply with local network regulations
Why B is correct
Network segmentation isolates the CDE from other network segments, reducing the scope of PCI DSS compliance by limiting the systems that must meet PCI DSS requirements and reducing attack vectors.
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Where this fits in the PCI DSS exam
Scoping Segmentation
Covers scoping segmentation concepts and practices within PCI DSS.
This question belongs to the "Build & Maintain a Secure Network" domain, which makes up about 20% of the PCI DSS exam.
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When does a third-party service provider's environment become part of the organization's PCI DSS scope?