There are four types of VPN. Name them and give an example of when I should use that type. Do you think there will be the need for more types of VPN? Why?How does software defined networking affect the management of a VPN in comparison to traditional VPN management? Does it improve or does it not improve the management of aVPN?As threats and attacks are a continuing issue, what new technologies/methods do you think should be implemented to protect a VPN?