CWAP-403 Exam Dumps | When a data frame is encrypted with WPA2, to which portion of the frame is the encryption applied?

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CWNP.CWAP-403.v2019-02-17.q29
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Question 26/29

When a data frame is encrypted with WPA2, to which portion of the frame is the encryption applied?

A. Frame body excluding the LLC

B. Frame body including the LLC

C. Frame body and MAC Header

D. The whole MPDU

Correct Answer: C

Recent Comments (The most recent comments are at the top.)

Kili - Feb 04, 2021

It should be B:

Slide 32 does show it is only the frame body and LLC. Header is cleartext.
https://ieee802.org/16/liaison/docs/80211-05_0123r1.pdf

Also this document shows that LLC + Data is being framed at the MAC layer - so LLC (which is upwards) and all data is framed into an MSDU which is encrypted. But MAC Header + Trailer are added (and it becomes an MPDU).
https://mrncciew.com/2014/08/16/decrypt-wpa2-psk-using-wireshark/

This also shows that encryption happens at MAC layer so MAC header is cleartext.
https://serverfault.com/questions/587406/which-layer-of-the-osi-model-is-responsible-for-encryption-in-wlans

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