Final answer:
WPA replaces WEP with the Temporal Key Integrity Protocol (TKIP), which includes improvements such as a per-packet key mixing function, a re-keying mechanism, and a Message Integrity Check (MIC) to provide more secure encryption.
Step-by-step explanation:
The Wi-Fi Protected Access (WPA) protocol replaces WEP with several improvements, including the Temporal Key Integrity Protocol (TKIP). TKIP is an encryption protocol that was introduced with WPA as an interim solution to replace WEP without requiring the replacement of legacy hardware. TKIP includes features like a per-packet key mixing function, a re-keying mechanism, and a Message Integrity Check (MIC), which is designed to provide more secure encryption than the older Wired Equivalent Privacy (WEP) standard. While WPA2, which uses the Advanced Encryption Standard (AES), eventually replaced WPA and TKIP for even higher security, TKIP was the main enhancement that WPA introduced over WEP.