Final answer:
WPA2 uses AES-CCMP 128-bit encryption to protect wireless networks, offering a strong level of security through the widely adopted Advanced Encryption Standard algorithm.
Step-by-step explanation:
The type of encryption used by WPA2 is B. AES-CCMP 128 bit. WPA2, which stands for Wi-Fi Protected Access 2, is a security protocol used to protect wireless networks. WPA2 uses the Advanced Encryption Standard (AES) with Counter Mode with Cipher Block Chaining Message Authentication Code Protocol (CCMP) for data protection. AES is a strong encryption algorithm used worldwide, and in the context of WPA2, it utilizes a 128-bit key size, providing a good balance between security and performance.