The correct answer is: C. Extranet
An extranet is a private network that is extended to users outside the organization. It is a secure network that allows authorized users to access specific information and applications. Extranets are often used to share information with customers, suppliers, and partners.
An intranet is a private network that is used by an organization’s employees. It is a secure network that allows employees to access information and applications that are not available to the public. Intranets are often used to share documents, collaborate on projects, and communicate with each other.
The Internet is a global public network that connects computers all over the world. It is a network of networks that allows users to access information and resources from anywhere in the world. The Internet is made up of millions of smaller networks, including intranets and extranets.
An Externet is not a real term. It is a made-up word that is sometimes used to refer to an extranet.