As a network administrator, you have implemented WPA2 encryption in your corporate wireless network.

WPA2 uses the Counter Mode with Cipher Block Chaining Message Authentication Code Protocol (CCMP), which employs the Advanced Encryption Standard (AES) block cipher for data encryption. The integrity check mechanism within WPA2 that provides security against replay attacks is the Cipher Block Chaining Message Authentication Code (CBC-MAC). CBC-MAC is used to authenticate packets and ensure their integrity, preventing the data from being altered, spoofed, or resent by attackers.

References: The information is consistent with the security protocols defined in the IEEE 802.11i standard for WPA2, which includes the use of CBC-MAC for packet authentication and integrity checks as part of the CCMP1234.