What TKIP features prevent attacks against the known weaknesses of WEP? (Choose 3)

A.
32 bit ICV (CRC 32)

B.
Sequence counters

C.
Michael

D.
RC5 stream cipher

E.
Block cipher support

F.
Increased IV length

Explanation:
TKIP uses a per – MPDUTKIP sequence counter (TSC)to sequence the MPDUs it sends. An 802.11 station drops all MPDUs that are received out of order. Sequencing is designed to defeat replay and reinjection attacks that are used against WEP Pg 75
TKIP uses a stronger data integrity check known as the Message Integrity Code (MIC) to mitigate known forgery attacks against WEP. The MIC is often referred to by its nickname of Michael. The MIC can be used to defeat bit – fl ipping attacks, fragmentationattacks, redirection, and impersonation attacks

The length is increased to 48 bits. IV is used as a sequence counter for replay attacks

http://docs.google.com/viewer?a=v&q=cache:eO8fn_DSCsoJ:www.seas.gwu.edu/~cheng/388/Lec Notes/TKIP.pdf+TKIP+Increased+IV+length&hl=en&gl=in&pid=bl&srcid=ADGEEShXsRCHRbqWo MYmtUFepJL9e_f-iupNtcllv9_TQFaoBu5_L25lM5nVsU41mJs_bVK6X- 6XXkq9a2bgQmOwe1ZEsZD2ZF1UEA6KX7atxJoJtkNmpi_gorvxjb6fa5zti43NvHeW&sig=AHIEtb RQoe2By2tWUppkdG6URcW7-POu8w