Which concept is essential for securing a WLAN against unauthorized access?

Role-Based Access Control (RBAC) is essential for securing a WLAN against unauthorized access because it allows administrators to define specific permissions and access rights based on the roles assigned to different users or devices. By implementing RBAC, organizations can ensure that only authorized users can connect to the network and access certain resources. This minimizes the risk of unauthorized access that could lead to data breaches or other security incidents.

With RBAC, access policies can be granular and customizable, enabling organizations to manage user permissions effectively. For instance, employees may have access to sensitive data relevant to their roles, while guests or temporary users can be restricted from accessing critical network components, ensuring that the WLAN remains secure.

Other options, while relevant to network management, do not serve as the core mechanism for securing the WLAN. Signal Attenuation Management addresses the physical aspects of the network signal but does not prevent unauthorized access. Open Network Configuration refers to unprotected wireless networks that invite unauthorized connections, which is the opposite of security. Standardized Network Naming helps with organization and ease of access but does not inherently enhance security measures.