Which of the following is a component that provides security in PCI DSS compliance?

The implementation of firewalls is a critical component for ensuring security in PCI DSS compliance. Firewalls are designed to protect networks by controlling incoming and outgoing traffic based on predetermined security rules. They serve as a boundary between a trusted internal network and untrusted external networks, effectively preventing unauthorized access to sensitive data, especially payment card information.

In the context of PCI DSS, ensuring that firewalls are properly configured and maintained is essential for safeguarding cardholder data and maintaining the overall security posture of the organization. This aligns with the PCI DSS requirement to restrict access to all systems and to maintain a secure network environment.

While regular employee training, entry logs, and performance assessments are important security practices and may support compliance indirectly, they do not create the same level of direct protection against external threats as firewalls do. Firewalls are a fundamental line of defense against cyberattacks, making them a key component of a comprehensive security strategy in achieving and maintaining PCI DSS compliance.