Virtual private network A (VPN) is an overlay network in which some of the links between nodes are carried by open connections or virtual circuits in some larger network (e.g., the Internet) instead of by physical wires. Enterprise private network An is a network that a single organization builds to interconnect its office locations (e.g., production sites, head offices, remote offices, shops) so they can share computer resources. WAN technologies generally function at the lower three layers of the: the, the, and the. A WAN often makes use of transmission facilities provided by common carriers, such as telephone companies. ![]() A WAN uses a communications channel that combines many types of media such as telephone lines, cables, and air waves. Wide area network A (WAN) is a computer network that covers a large geographic area such as a city, country, or spans even intercontinental distances.
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