What feature distinguishes 802.11i in WiFi?

The distinguishing feature of 802.11i in WiFi is its implementation of strong encryption and integrity protection mechanisms. This standard was developed to enhance the security of wireless networks by introducing robust protocols that protect user data during transmission.

802.11i employs the Advanced Encryption Standard (AES) for data encryption, which is considered significantly more secure than previous standards. It also incorporates the Counter Mode with Cipher Block Chaining Message Authentication Code Protocol (CCMP) which not only encrypts the data but also provides integrity checks to ensure that the data has not been tampered with during transmission.

This focus on strong encryption and integrity protection sets 802.11i apart from previous WiFi security standards that either lacked adequate encryption or relied on weaker methods. Thus, the correct answer highlights the importance of robust security features in modern wireless communications, which are essential given the increasing number of cyber threats targeting unsecured networks.