A secure tunnel over an untrusted network is provided by which technology in the following?

A tool that provides an encrypted secure tunnel between two networks or between a customer device and a network is Virtual Private Network (VPN). To the internal organization network, enterprises use VPNs to allow secure connection of mobile devices like laptops and smart devices. Typically when you are in an organization a VPN will not be needed, but when you are working from a coffee shop or home then a VPN can give you a secure connection to organization servers and systems.