Which of the following encryption modes are possible in WEP? Each correct answer represents a complete solution. Choose all that apply.

WEP supports 128-bit encryption using a 104-bit secret key combined with a 24-bit initialization vector (IV), providing a stronger - though still cryptographically weak - configuration than the original 40-bit mode.

256-bit encryption is not defined anywhere in the WEP standard; WEP only specifies 40-bit and 104-bit key lengths, commonly marketed as 64-bit and 128-bit respectively.

WEP's original mode uses a 40-bit key combined with a 24-bit IV (totaling 64 bits); this was the first key length defined in the 802.11 standard and remains a valid selectable encryption mode.

The WEP standard allows devices to operate with encryption disabled entirely, making no encryption a valid (though obviously insecure) configuration option.