CWNA Wireless Network Administrator

Answer - C - The size of the static key used in 128-bit WEP encryption schemes is 104 bits.

Key Takeaway: WEP uses the stream cipher RC4 for confidentiality and the CRC-32 checksum for integrity. A 128-bit WEP key is almost always entered by users as a string of 26 hexadecimal characters. Each character represents four bits of the key. 26 digits of four bits each give 104 bits, and adding the 24-bit IV produces the final 128-bit WEP key.