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?

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.

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.

AES encryption is a feature of WPA2 (using CCMP), not WPA - WPA itself still relies on RC4 paired with TKIP.

WPA uses TKIP to implement per-packet key rotation, meaning each data frame is encrypted with a unique derived key rather than the same static key used throughout a WEP session. This key rotation closes the cryptographic attack vectors that allowed WEP keys to be recovered by capturing enough ciphertext, which was the fundamental flaw WPA was designed to address.