CISA Certified Information Systems Auditor – Question1999

The BEST reason for implementing a virtual private network (VPN) is that it:

A. eases the implementation of data encryption.
B. allows for public use of private networks.
C. enables use of existing hardware platforms.
D. allows for private use of public networks.

Correct Answer: D

Explanation:

Explanation:
Virtual private networks (VPNs) connect remote users over an insecure public network such as the Internet. The connection is virtual because it is temporary with no physical presence. VPN technology is cost-effective and highly flexible. A VPN creates an encrypted tunnel to securely pass data as follows:
Between two machines (host-host)
From a machine to a network (host-gateway)
From one network to another network (gateway-gateway)