• WPA2 with AES
• WPA2 with TKIP
• WEP
• WPA

The correct answer is: WPA2 with AES

Explanation: For encryption, both IEEE 802.11i and WPA2 use the Advanced Encryption Standard (AES). The most powerful encryption protocol currently available is AES. WPA2 doesn’t employ TKIP (Temporal Key Integrity Protocol). TKIP is used by WPA. WPA is more secure than WEP, however it is not as secure as WPA2 (AES).