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It's used to connect widely-separated groups of users. Example: You're the IT lead for a company that makes stuff for the army. You've got branch offices outside Fort Bragg, Fort Hood, Fort Riley and Fort Lewis--and they all need connectivity to an IBM Z/Server in Seattle. The internet won't work (although it is a WAN) because you're passing 5GB files and can't afford any dropouts, so you put two satellite dishes on the roof of each branch, point each at a different geostationary bird, and set up redundant lines of communication. Although i can't explain more on this topic here, please read this article to more about How a wan can be used - http://www.wanredundancy.org/resources/wan-routing/introduction-to-wide-area-networks/wide-area-network-wan.html

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16y ago

What else can I help you with?