What kind of technology do VPNs often utilize for their functionality?

VPNs, or Virtual Private Networks, primarily utilize encryption technology to secure the data transmitted over the internet. By encrypting the data, VPNs create a secure tunnel for the information, ensuring that it cannot be intercepted or read by unauthorized parties. This encryption process is essential for protecting sensitive information such as passwords, personal data, and confidential communications while transmitting data over potentially insecure networks like public Wi-Fi.

While 3G/4G technology and wireless technology are related to how devices connect to the internet, they do not inherently provide the security benefits that encryption does. Battery technology, on the other hand, is entirely unrelated to network security and data transmission. Therefore, encryption technology is critical for VPNs as it underpins their capability to safeguard user data and maintain privacy online.