N10-005 Question #441: Real Exam Question with Answer & Explanation

The correct answer is D: Key rotation. WPA improved upon WEP primarily by introducing TKIP (Temporal Key Integrity Protocol), which dynamically rotates encryption keys per packet, eliminating WEP's static key weakness.

Question

A technician needs to install a new wireless encryption system. They are evaluating the feasibility of implementing WPA. WPA increases protection over WEP by implementing which of the following?

Options

AStrong RC4 encryption
BShared secret keys
CAES encryption
DKey rotation

Explanation

WPA improved upon WEP primarily by introducing TKIP (Temporal Key Integrity Protocol), which dynamically rotates encryption keys per packet, eliminating WEP's static key weakness.

Common mistakes.

A. Both WEP and WPA use the RC4 stream cipher; the improvement in WPA is not a stronger version of RC4 but rather how the key is derived and rotated via TKIP on top of RC4.
B. WEP also uses a shared secret key (PSK); the problem with WEP is that the shared key is static and reused, which TKIP's key rotation in WPA corrects.
C. AES encryption is a feature of WPA2 (using CCMP), not WPA - WPA itself still relies on RC4 paired with TKIP.

Concept tested. WPA TKIP key rotation improvement over WEP

Reference. https://www.wi-fi.org/discover-wi-fi/security

Community Discussion

No community discussion yet for this question.

Full N10-005 Practice