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Example of WAN

WAN, or Wide Area Network is a network of computers that are connected on a larger scale, hundreds and even thousands of miles apart. WAN's are helpful for national and international companies as it allows them to share files and other important information. Some WANs are public, but the majorities are private. WANs are also used to connect other smaller networks such as LANs.

Examples of WAN:

The Internet
http://en.wikipedia.org/wiki/Computer_network#Wide_area_network
http://www.tr.txstate.edu/ser-cat/sc-hosting-network/wan.html
http://www.cisl.ucar.edu/docs/asr97/wan.html
http://en.wikipedia.org/wiki/Wide_area_network

Image Example of WAN:

Gateway firewall it is located between the local area network (LAN) and wide area network. The LAN should be protected from attacks.

Norwegian army first lieutenant (1LT) erik paal bjoerke, conducts a test of the Local Area Network/Wide Area Network (LAN/WAN) system, at lager aulenbach, germany, during exercise combined endeavor 2003.

Comparison between a traditional WAN and VPN which is used.