Which system is focused on verifying user identities and controlling their access to systems and resources?

The correct answer highlights Identity and Access Management (IAM) as a critical system that focuses on verifying user identities and controlling access to various systems and resources. IAM encompasses a variety of tools and processes that manage digital identities and the policies associated with them. This includes authentication methods (like passwords, biometrics, and multi-factor authentication) as well as authorization processes that determine what resources a user can access and what actions they can perform.

IAM is essential for ensuring that the right individuals have appropriate access to technology resources, significantly contributing to organizational security and compliance with regulations.

In contrast, the other options, while related to access and identity in different ways, do not encompass the full scope of IAM. For instance, network access control is more about managing access at the network level, operation access management may refer to controlling access specifically for operational systems, and role-based access systems involve assigning permissions based on user roles, which is just one aspect of the broader IAM framework. Thus, IAM serves as the comprehensive solution that incorporates identity verification, access control, and management of user permissions across all systems.