- internetworking
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Internetworking involves connecting 300 computerscomputer networks or network segments together to form an internetwork (often shortened to internet), using devices which operate at layer 3 (Network layer) of the OSI Basic Reference Model (such as routers or layer 3 switches) to connect them together to allow traffic to flow back and forth between them.[1] The layer 3 routing devices guide traffic on the correct path (among several different ones usually available) across the complete internetwork to their destination.
The connecting together of networks with bridges is sometimes incorrectly termed "internetworking", but the resulting system mimics a single subnetwork, and no internetworking protocol (such as IP) is required to traverse it. However, a single computer network may be converted into an internetwork by dividing the network into segments and then adding routers or other layer 3 devices between the segments [1].
Source: Wikipedia (http://en.wikipedia.org/wiki/Internetworking)
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www.eg3.com/internetworking
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