Which two statements about the Wired Equivalent Privacy （WEP） encryption mechanism are true？ （）

• A、the two methods of authentication using the WEP encryption are open and shared key
• B、the 802.11 standard defines WEP security using 128-bit keys
• C、WEP can provide stronger authentication through the use of LEAP， PEAP， or EAP-FAST
• D、WEP is a scalable encryption solution that uses static keys for authentication
• E、WEP security provides only one-way authentication
• F、WEPv2 offers improved encryption by replacing the RC4 encryption mechanism with the AES （symmetric block cipher） mechanism