What you need to know about VPNs

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Content source

http://betanews.com/2015/12/21/what-you-need-to-know-about-vpns/

A virtual private network (VPN) brings additional security to anyone using a public network, such as the Internet. Using a variety of security methods, such as encryption, the VPN is able to safeguard any data transmitted across the network, which may be at risk if it simply used the underlying public network infrastructure.

VPNs are often employed when it would not be practical to use a physical private network, usually due to financial reasons. As businesses embrace mobile working and face increasing pressure to protect sensitive information, many are employing virtual private networks to improve their network security.

nothing new but a good start for beginners.