Discussion
Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?
Answer: C
Correct answer: VPN
A VPN builds a private network across a shared public one, tunnelling traffic so that it is private in transit and so that protocols the intervening network does not carry can be encapsulated within IP. IPSec is one suite used to secure such tunnels rather than the concept itself, and HDLC, cable and xDSL are link technologies.
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