VPN - Virtual Private Networks
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Basically, a VPN is a private network that uses a public network (usually the Internet - in this case the Clubwifi Network) to connect remote sites or users together. Instead of using a dedicated, real-world connection such as leased line, a VPN uses "virtual" connections routed through the Internet from the company's private network to the remote site or employee. This allows users that need to access their business or corporate networks to do so in a safe and secure manner. Many remote business workers use this method to connect to their business servers for email, printers and file servers.
Internet
Public Wifi
Firewall
VPN Router
This diagram shows the basic method of using a VPN from a Public Wifi Network.