Which two wireless s

Which two wireless security statements are true？（）

• AA TACACS+ server is required to implement 802.1x.
• BMIC protects against man-in-the-middle and replay attacks.
• CThe 802.1x standard provides encryption services for wireless clients.
• DThe AES （symmetric block cipher） is specified in the IEEE 802.11i specification.
• EThe IEEE 802.11i specification uses RC4 as its encryption mechanism.
• FWPA requires TKIP and AES as encryption methods.