Final answer:
A VPN is used to provide secure and private connections over public networks. The myths surrounding VPN are related to the subject of Computers and Technology. The legality of VPN usage depends on specific laws and regulations.
Step-by-step explanation:
a) The primary purpose of a VPN (Virtual Private Network) is to provide a secure and private connection over a public network, such as the internet. It allows users to access resources and services on a network as if they were directly connected to it, even when they are physically located elsewhere.
b) The subject associated with the myths surrounding VPN is Computers and Technology.
c) In the context of VPN, the law relates to issues such as data privacy, encryption regulations, surveillance, and use of VPN for illegal activities.
d) The statement that the use of VPN is prohibited by law is not universally true. VPN usage is legal in many countries, but there may be specific laws or regulations regarding its use in certain contexts. It's important to be familiar with local laws and regulations regarding VPN usage.