Which of the following is true about WPA and WPA2?

WPA (Wi-Fi Protected Access) and WPA2 are both security protocols designed to protect wireless networks. The statement that they can require authentication servers is accurate because both WPA and WPA2 are capable of utilizing different methods of authentication, including the use of an authentication server.

In enterprise environments, WPA and WPA2 typically use a protocol called RADIUS (Remote Authentication Dial-In User Service) for user authentication. This allows for a more secure and scalable way to manage access to the network, particularly in larger organizations where multiple users access the network. RADIUS servers can handle various authentication methods, such as EAP (Extensible Authentication Protocol), providing a robust framework for validating user credentials before granting access to the network.

The other statements do not align with the characteristics of WPA and WPA2. They do require an authentication server in some scenarios, specifically in enterprise uses, and they are known to be more secure than WEP (Wired Equivalent Privacy), which is considered outdated and vulnerable. While WPA and WPA2 have faced vulnerabilities over time, they are generally still in use, particularly with WPA2 being regarded as more secure than its predecessors.