Let me start with the basics, defining that three-letter acronym, Virtual Private Network. I have a rule that one cannot use a TLA (Three Letter Acronym) unless they know what it is short for. VPN allows a more secure connection between two computers via a public network. Typically, this connection is made via encrypted packets using an agreed upon scheme. The exact method is not relevant for the most part, what is important is that it is one that is trusted.