Which of the following is a common technique used to secure a Wi-Fi network?

WPA2 encryption is a standard security protocol that provides a strong level of protection for wireless networks. It enhances the confidentiality of the data being transmitted over the Wi-Fi network by using Advanced Encryption Standard (AES), which is a robust encryption method. By implementing WPA2, users ensure that unauthorized individuals cannot easily gain access to the network or intercept the data being communicated.

In contrast to WPA2, utilizing public access or an unsecured Service Set Identifier (SSID) would leave the network vulnerable to unauthorized users and potential data breaches. Similarly, disabling MAC filtering would not provide an extra layer of security, meaning that any device could connect to the network without restrictions. Thus, choosing WPA2 encryption is essential for effectively securing a Wi-Fi network and safeguarding user information.