Term Description
VPN VPN (Virtual Private Network) is a network of secure links over a public IP infrastructure. Technologies that fit in this category include PPTP (Point-to-Point Tunneling Protocol), L2TP (Layer 2 tunneling protocol) and IPSec.

Note that tunneling and VPN is not intended as a substitute for data encryption by itself. For a higher security level strong encryption should be used within the VPN.
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