What are the phases of setting up VPN connections?

There are three phases of setting up the VPN connections. These include authentication where the data packets are encapsulated to conceal their identity; tunneling, which is the process of providing a safe passage for the data to transfer from one point to the other; encryption, which actually transforms the data to an encrypted form so that when it is passed through the tunnel, no one is able to see or decipher it.

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