What does a CASB primarily help organizations manage in relation to cloud applications?

A Cloud Access Security Broker (CASB) plays a critical role in helping organizations manage user access controls in relation to cloud applications. This is a vital aspect of cybersecurity, especially as businesses increasingly adopt cloud services. A CASB acts as an intermediary between users and cloud service providers, enforcing security policies and ensuring that access to cloud applications is appropriately managed.

By implementing user access controls, a CASB can provide visibility into user activities, enforce authentication policies (such as multi-factor authentication), and ensure that only authorized users can access specific cloud resources. This includes managing permissions, monitoring user behavior, and identifying anomalies that could indicate a security threat.

This focus on managing user access is essential because, with the vast number of cloud applications available, organizations must ensure that their users have the appropriate access rights considering the sensitivity of the data and compliance requirements.

In contrast, network infrastructure, physical security, and data storage solutions are broader categories that, while important, are not the primary focus of a CASB. CASBs specifically target the nuances of securing cloud applications through user access management, making it the best answer in this context.