What is the primary function of network segmentation?

The primary function of network segmentation is to isolate system components storing cardholder data from those that do not. This practice is crucial in enhancing security measures within a network by creating distinct segments. By isolating sensitive data environments, such as those that handle cardholder data, organizations can reduce their attack surface and limit unauthorized access to sensitive information.

Segmentation allows security measures to be focused on areas with sensitive data, ensuring that systems that do not handle this data operate within a less restricted environment. This separation not only helps in mitigating risks but also aids compliance with standards such as the PCI DSS, which promotes protecting cardholder data through appropriate security measures. By effectively segmenting the network, organizations can ensure that access controls, monitoring, and compliance audits are tailored specifically to the elements that process and store cardholder information, thereby enhancing overall data security.