What is the first requirement of PCI DSS?

The first requirement of PCI DSS is to "Build and Maintain a Secure Network and Systems." This foundational component sets the stage for establishing a secure environment for processing, storing, or transmitting cardholder data.

Part of this requirement emphasizes the importance of implementing robust network security measures, such as firewalls and secure systems configurations. These protections are critical for defending against unauthorized access to sensitive information. Building a secure network establishes the necessary groundwork to ensure that all subsequent requirements, like access control and regular security testing, can be effectively implemented in a secure manner.

While all options play crucial roles within the broader PCI DSS framework, the initial step of creating a secure network is essential. It is impossible to successfully implement further security measures without first establishing a solid foundation of security.