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

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.