The best known example of a network is probably the internet. But there's also an intranet (a small network, where a firewall closes down for access from the outside) and an extranet (here you can get inside from the outside - First Class is sort of an extranet). The phone net is also a network btw., and some places the phone net is the basis for the internet.
Physically a network is built of nodes (machines) and communication ways (wires).
Network makes other services possible. One of them is email. Another one is news - these can be read by Google, in their fan for Groups, but there's also a special client and protocol for this.
Concept last updated: 10/09 2003.