Answer:
c) WANs can be as big as the Internet.
Explanation:
Wide Area Networks (WAN) are LAN and MAN computer networks interconnected with each other. Its nodes are separated by distances that can span entire continents. The members of those networks are not necessarily physically connected. They make use of microwave and satellite services to integrate their different nodes.
They are widely used by large companies that cover a lot of territory. They generally need to use virtual private networks (VPNs) to get the necessary privacy in data exchange. Another very frequent use is to offer web connection to clients of large Internet providers (ISP - Internet Service Provider).
Due to the breadth of their coverage they need to go through public networks, such as telephone networks, as well as rent transportation services to other private networks and use satellite connections to be able to carry information from one place to another.
