What is WPA-2 Enterprise primarily characterized by?

WPA-2 Enterprise is primarily distinguished by its use of the IEEE 802.1X framework for authentication and the requirement for a RADIUS server to handle user credentials and dynamic key generation. This configuration provides a more secure environment than its counterparts, ensuring that each user is authenticated individually against a centralized database, which is typically stored on the RADIUS server.

The implementation of WPA-2 Enterprise significantly enhances security by making it possible to use unique encryption keys for different sessions or users, reducing the risk of unauthorized access. This setup allows granular access control and improved management of network resources, making it suitable for larger enterprises where security is a paramount concern.

The other options describe different aspects of wireless security methods but do not encapsulate the specific characteristics of WPA-2 Enterprise as effectively as the correct choice.