Using Visio or another diagramming tool, create your own original diagram of the end$-$to$-$end cryptographic process of establishing a VPN connection. You may not submit a diagram that you find online. Be sure to diagram all aspects of the process, and be sure to focus on the secure symmetric key exchange, the authentication of VPN link endpoints, and the verification of both the source and integrity of transmitted data. Write a robust narrative description of the processes depicted.