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The protocols that form a Virtual Private Network This lesson covers the protocols necessary for form a Virtual Public Network (VPN). These protocols include: Secure Socket Layer (SSL) VPN: web browser based VPN (HTTPS) Transport Layer Security (TLS): More common HTTPS Transport Layer Security 2 (TLS2): enhanced security, hashing checks Peer to Peer Tunneling Protocol (PPTP): Older dialup protocol, adds client on virtual node and has weak encryption. It is not recommended. Layer 2 Tunneling Protocol: Carries layer 2 traffic and has no encryption by itself but utilizes IPsec, RADIUS and TACAS +.