Which of the following statements is true about the VPN in Network security?

A) It typically creates a secure, encrypted virtual "tunnel" over the open internet

B) It is usually based on the IPsec( IP Security) or SSL (Secure Sockets Layer)

C) It is a type of device that helps to ensure that communication between a device and a network is secure.

D) All of the Above

Correct Answer : All of the Above

Explanation : The term VPN stands for Virtual Private Network. It is a type of network security-enhancing tool that can be either a software program or a hardware device. It usually authenticates the communication between a device and a network by creating a secure encrypted virtual "tunnel". In general, the software VPNs are considered as the most cost-effective, user friendly over the hardware VPNs.