Virtual Private Network (VPN) is a generic term that refers to the use of public or private networks to interconnect separated network users so that they may communicate as if on a private network. Which of the following is least likely to be implemented to support VPN? (Wentz QOTD)
A. Interconnect LAN segments over a packet-switched network as one single LAN.
B. Encapsulate a MAC frame in UDP to create an overlay network or tunnel.
C. Use a delivery protocol operating equal to or higher than the payload to create a tunnel.
D. Encapsulate IPsec traffic in tunnel mode using ESP to enforce end-to-end confidentiality.

Kindly be reminded that the suggested answer is for your reference only. It doesn’t matter whether you have the right or wrong answer. What really matters is your reasoning process and justifications.