What does Sitecore's Role-Based Access Control (RBAC) do?

Sitecore's Role-Based Access Control (RBAC) is a critical feature that enhances security and user management within the Sitecore environment. It specifically enables the platform to control user access rights based on the roles assigned to different users. This means that users can have specific permissions that dictate what they can view, edit, delete, or publish within the Sitecore ecosystem.

By assigning roles, administrators can effectively manage and restrict access to sensitive content, ensuring that only authorized personnel can make changes or view certain sections of the website. This is particularly important in larger organizations where different teams or individuals have varying responsibilities and levels of access to the content management system.

The other choices represent different functionalities that Sitecore might have, but they do not pertain to the core function of RBAC. For instance, managing content delivery through a CDN is focused on how content is distributed across the web, optimizations for site speed pertain to performance improvements, and facilitating item versioning is about managing different versions of content rather than controlling user access.