CompTIA Security+ Question E-98

A security administrator must implement a wireless encryption system to secure mobile devices’ communication. Some users have mobile devices which only support 56-bit encryption. Which of the following wireless encryption methods should be implemented?

A. RC4
B. AES
C. MD5
D. TKIP

Answer: A

Explanation:
RC4 is popular with wireless and WEP/WPA encryption. It is a streaming cipher that works with key sizes between 40 and 2048 bits, and it is used in SSL and TLS.