Which of the following is a type of network in which an organization permits specific users (such as existing customers) to have access to its internal network through the Internet by building a virtual private network?

Which of the following is a type of network in which an organization permits specific users (such as existing customers) to have access to its internal network through the Internet by building a virtual private network?
A . Intranet.
B . Extranet.
C . Digital subscriber line.
D . Broadband.

Answer: B