Which of the following links customers, suppliers, partners, or communities of interest to a corporate intranet over a shared infrastructure? Untrusted networks Intranets DMZs Extranet VPNs

Answer: Extranet

Explanation: An extranet is private networking unit that is responsible for providing the data/information to the people like customers, consumers, vendors, etc. It is the type of network service that can be assessed by the few people outside the organization and provides the information.

Other options are incorrect because untrusted network, intranet, VPN (virtual private network) and DMZ (demilitarized zone) are the networks that don't provide data about the organization to other people and deal only with business processes. Thus the correct option is extranet.