Aprovides a secure private tunnel from the user’s computer through the internet to another destination and is most often used to provide remote employees with secure access to a company network.

A Virtual private Network provides a secure private tunnel from the user’s computer through the internet to another destination and is most often used to provide remote employees with secure access to a company network.

When we use an internet service provider, we will leave trace whenever we conduct a web surfing that could be detected by a highly-skilled hacker or the provider itself. A virtual private network will obstruct that trace so it became almost impossible to be detected

Ithink its 3! hope it : -)