Final answer:
WEP uses the RC4 encryption standard for confidentiality.
Step-by-step explanation:
The encryption standard used by WEP (Wired Equivalent Privacy) for confidentiality is RC4.
RC4 (Rivest Cipher 4) is a stream cipher that is widely used in wireless networks for securing data transmission.
Other encryption standards such as AES (Advanced Encryption Standard), 3DES (Triple Data Encryption Standard), and RC5 (Rivest Cipher 5) are not used by WEP.