VPN stands for Virtual Private Network. By using public media we are
establishing a private secure connection. To communicate through VPN we use PPTP
(Point to Point Tunneling Protocol) or L2TP (Layer2 Tunneling Protocol).
Most cases we use L2TP because this is more secure. The only one case that we
use PPTP is only when we are trying to use VPN through a NAT server, another reason to use is if don’t have windows clients that have capability to establish L2TP VPN
connection.
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