Which of the following statements is not true?

A) A VPN uses both authentication and encryption.
B) A VPN uses a dedicated secure line.
C) The primary use of VPNs is to establish secure communications among business partners.
D) A VPN provides both confidentiality and integrity.

B) A VPN uses a dedicated secure line.

Explanation:

The main work of a VPN software is to create a secure network inside one that already exist for the purpose of carrying traffic through. Connecting directly to the internet may have some security concerns, especially for business, and hence the VPN uses a remove server to receive the information or traffic first. This means that these information or traffic passes through a VPN service that is fully encrypted all the time, to ensure that information is secure. It does not use any dedicated secure line.

solution:

this situation is called an ip conflict.

data from a server is sent in small bits called packets. in an ip conflict, some packets will end up in one computer while some other packets will end up in another computer.

so…overall none of the computers get the data as the original message or picture being sent by the server cannot be retrieved with only half the packets. so it will show up as an error.

thus the final answer is d.