Which cipher is supported for wireless encryption only under the WPA2 standard?

AES (Advanced Encryption Standard) is the strong encryption cipher used exclusively with WPA2 for wireless security. WPA2 mandates AES, specifically AES-CCMP, for robust data protection. RC4 is an older, weaker cipher used with WEP and WPA (WPA1), making it less secure and not supported by WPA2. SHA (Secure Hash Algorithm) is a hashing function, not an encryption cipher, used for integrity checks, not data confidentiality. AES256 is a specific key length for AES, but AES itself is the cipher supported by WPA2; AES-CCMP typically uses AES-128.