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What is a Virtual Private Network (VPN)?

A VPN creates an encrypted tunnel between a user's device and a remote server, so traffic traveling across an untrusted network, like public Wi-Fi or the internet, can't be read or tampered with by anyone in between.

The tunnel is established using protocols such as IPSec, OpenVPN, or WireGuard, which handle key exchange and encrypt every packet before it leaves the device.

  • Hides the user's real IP address from destination servers
  • Protects data on untrusted networks such as public Wi-Fi
  • Lets remote employees securely reach internal company resources

Organizations commonly deploy site-to-site VPNs to link offices together and remote-access VPNs so individual employees can connect to internal systems from home.

What is the main security benefit of a VPN?
Which VPN type connects two office locations together?

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