Which two statements about the Wired Equivalent Privacy （WEP） encryption mechanism are true？ （）
- Athe two methods of authentication using the WEP encryption are open and shared key
- Bthe 802.11 standard defines WEP security using 128-bit keys
- CWEP can provide stronger authentication through the use of LEAP， PEAP， or EAP-FAST
- DWEP is a scalable encryption solution that uses static keys for authentication
- EWEP security provides only one-way authentication
- FWEPv2 offers improved encryption by replacing the RC4 encryption mechanism with the AES （symmetric block cipher） mechanism