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Networking is to link two or more computing devices together for the purpose of sharing data.

Networks can be categorized in several different ways. Local Area Networks (LANs) typically reach across a single premises. Wide Area Networks (WANs), reach across cities and countries among others. The Internet is the world's largest public WAN.

A network topology represents its layout. In bus networks, all of the computers communicate across one common cable, whereas in a star network, all data flows through one centralized device. Common types of network topologies include Bus, Star, Ring and Mesh.

The communication language used by computer devices is called the protocol. Networks often implement multiple protocols to support specific applications. Popular protocols include TCP/IP, the most common protocol found on the Internet and LAN networks.

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