What is a VPN Connection ?

A virtual private network (VPN) is a method of computer 
networking--typically using the public internet--that allows users to 
privately share information between remote locations, or between a remote 
location and a business' home network. A VPN can provide secure information 
transport by authenticating users, and encrypting data to prevent unauthorized 
persons from reading the information transmitted.
The VPN can be used to send any kind of network traffic securely.

VPNs are frequently used by remote workers or companies with remote offices 
to share private data and network resources. VPNs may also allow users to 
bypass regional internet restrictions such as firewalls, and web filtering, 
by "tunneling" the network connection to a different region.
Technically, the VPN protocol encapsulates network data transfers using a 
secure cryptographic method between two or more networked devices which 
are not on the same private network, to keep the data private as it passes through 
the connecting nodes of a local or wide area network.