Explain how a VPN is used to create an encrypted tunnel between the client and the RAS server.

What will be an ideal response?

To create this tunnel, the client first connects to the Internet by establishing a connection using a remote access protocol. Once connected to the Internet, the client establishes a second connection with the VPN server. The client and the VPN server agree on how the data will be encapsulated and encrypted across the virtual tunnel. Information can then be sent securely between the two computers because outsiders can't see into the tunnel.