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

The correct answer is: WPA2 with AES

Explanation: Both IEEE 802.11i and WPA2 use the Advanced Encryption Standard (AES) for encryption. AES is the most strong encryption protocol currently available. WPA2 does not employ TKIP (Temporal Key Integrity Protocol). WPA is the one who uses the TKIP protocol. WPA is superior to WEP in terms of encryption, however it falls short of WPA2 (AES).