Due to hardware limitation, a technician must implement a wireless encryption algorithm that uses
the RC4 protocol. Which of the following is a wireless encryption solution that the technician
should implement while ensuring the STRONGEST level of security?

A.
WPA2-AES

B.
802.11ac

C.
WPA-TKIP

D.
WEP

Explanation:
WPA-TKIP uses the RC4 cipher.
TKIP and the related WPA standard implement three new security features to address security
problems encountered in WEP protected networks. First, TKIP implements a key mixing function
that combines the secret root key with the initialization vector before passing it to the RC4
initialization. WEP, in comparison, merely concatenated the initialization vector to the root key, and
passed this value to the RC4 routine. This permitted the vast majority of the RC4 based WEP
related key attacks. Second, WPA implements a sequence counter to protect against replay
attacks. Packets received out of order will be rejected by the access point. Finally, TKIP
implements a 64-bit Message Integrity Check (MIC)
To be able to run on legacy WEP hardware with minor upgrades, TKIP uses RC4 as its cipher.
TKIP also provides a rekeying mechanism. TKIP ensures that every data packet is sent with a
unique encryption key.