"The problem is that data sent over the Internet is not secure
since it can be sniffed (intercepted and analyzed) relatively
easily. In fact it is particularly vulnerable to sniffing when you
are connected to the Internet using a public wireless hotspot, or
using a wired connection at a hotel or conference center on a local
network that uses hubs instead of switches.
"The solution is to use a virtual private network, or VPN. Put
in simple terms a VPN secures your data by encrypting each packet
and wrapping it in an envelope which has its destination printed on
it. Anyone intercepting this envelope could see its intended
destination, but not the contents (because the contents is
encrypted.) Once the packet arrives at its destination it is
removed from the VPN envelope, decrypted, and then handled in the
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