Answer: A - L2TP or Layer 2 Tunneling Protocol (L2TP) is the result of a partnership between Cisco and Microsoft. It was created to provide a more secure VPN protocol than PPTP. L2TP is a tunneling protocol like PPTP that allows users to access the common network remotely. Point-to-Point Tunneling Protocol (PPTP) was a network protocol that enabled the secure transfer of data from a remote client to a private enterprise server by creating a virtual private network (VPN) across TCP/IP-based data networks. It is not as secure as UDP/PPTP.
Key Takeaway: The PPP frame is encrypted with Microsoft Point-to-Point Encryption (MPPE) by using encryption keys generated from the MS-CHAPv2 or EAP-TLS authentication process. VPN clients are forced to use the MS-CHAPv2 or EAP-TLS authentication protocol to encrypt the payload of PPP frames. SSH is a network protocol that allows data to be exchanged using a secure channel between two networked devices. Point-to-Point Protocol, or PPP, is a data link protocol commonly used to establish a direct connection between two networking nodes. Hypertext Transfer Protocol Secure (HTTPS) is a combination of the Hypertext Transfer Protocol and a cryptographic protocol.
