What is “Virtual Private Network” ? (a) It is a private computer network of an organization where the remote users can transmit

What is “Virtual Private Network” ? 

(a) It is a private computer network of an organization where the remote users can transmit encrypted information through the server of the organization. 

(b) It is a computer network across a public internet that provides users access to their organization’s network while maintaining the security of the information transmitted. 

(c) It is a computer network in which users can access a shared pool of computing resources through a service provider. 

(d) None of the statements (a), (b) and (c) given above is correct description of Virtual Private Network.