Which statement best describes VPNs?

Which statement best describes VPNs?
A . VPN technology secures communication across trusted network boundaries.
B . VPNs can be defined as a technology used to secure communication across an untrusted network.
C . VPNs are best deployed on mobile and BYOD-based devices.
D . VPNs are logical networks that are dependent on the physical architecture.
E . VPNs are created at the transport layer of the OSI model.

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Answer: B