An NNTP virtual server allows you to administer newsgroup services by controlling authentication and client connections from a centralized location. Every computer running Exchange 2000 can host multiple NNTP virtual servers on each computer. Each NNTP virtual server can have its own configuration properties, such as bound IP addresses, port number, and authentication type, to administer collections of newsgroups with different needs. The NNTP virtual server works with the NNTP service that Windows 2000 provides to process messages and manage feeds between newsgroup hosts.
To learn more about NNTP virtual servers: