Which of the following provides a secure tunnel for transmitting data through an insecure network such as the Internet?
A. Remote access portal
B. Virtual private network
C. Network access control system
D. DMZ
Answer: B
Explanation: A virtual private network provides a secure tunnel for transmitting data through an insecure network such as the Internet. A remote access portal provides access to one or more applications through a single centralized interface. Network access control systems can check if a remote access device meets predefined criteria.
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