Which of the following practices for secure server configuration uses RBAC (Role-Based Access Control) to limit user access to a host?

Using Role-Based Access Control (RBAC) as part of secure server configuration is effectively encapsulated in the practice of host lockdown. This approach focuses on restricting access to a server based on the roles assigned to users. With RBAC, administrators can ensure that only authorized individuals have access to specific resources and functionalities, thereby minimizing the risk of unauthorized access or alterations to the server's configuration.

Host lockdown typically involves configuring the server to only allow designated users or roles to perform certain actions, which could include accessing sensitive files, running specific applications, or managing server settings. By implementing RBAC during the lockdown process, organizations can finely tune access controls, ensuring that users can perform their tasks without exposing the server to unnecessary risks.

In contrast, while host patching refers to the process of updating server software to fix vulnerabilities, it does not directly relate to user access control. Host hardening involves applying security measures to reduce vulnerabilities and may include RBAC, but it is a broader practice that encompasses more than just access control. Host mapping usually involves understanding the relationships and dependencies between different servers or systems and does not focus on user role management. Therefore, host lockdown is the practice most directly associated with utilizing RBAC to control and limit user access effectively.