Definition
A VPN or Virtual Private Network creates a secure, encrypted connection over a public network like the internet, effectively extending a private network to a remote user or site. It works by tunneling data packets through an encrypted "pipe" between the user's device and a VPN server, making it appear as if the user is directly connected to the private network. This technology is crucial for protecting sensitive data in transit, enabling secure remote access for employees, and maintaining privacy online. For instance, a remote worker can use a VPN to securely access company resources as if they were physically in the office. Unlike a proxy server which only reroutes traffic, a VPN encrypts all data passing through it. Understanding VPNs is essential for cybersecurity certifications like CompTIA Security+ and CySA+.