Problem Statement
What is a Virtual Private Network (VPN), and how does it secure data?
Explanation
A VPN creates an encrypted tunnel between the user’s device and a remote server over the public Internet. It masks the user’s IP address and secures data from eavesdroppers. VPNs are widely used for remote work, secure browsing, and bypassing geo-restrictions. In interviews, explain how VPNs use encryption and tunneling protocols like IPSec or OpenVPN to provide confidentiality and integrity.