VPN

VPN: encapsulating the communication between the two PC’s in an encrypted tunnel that uses strong encryption methods.

IPsec (Internet Protocol Security), is a set of protocols define by the Internet Enginering Task Force (IETF) to provide IP security at the network layer.

IPSec based VPN made up of two parts:

• 1. IKE Internet Key Exchange protocol
• 2. ESP IPsec protocols

PPTP

L2TP

SSL-VPN