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A wireless network is a computer network that uses wireless data connections between network nodes. The wireless network is a method by which households, telecommunications networks and commercial facilities avoid the costly process of introducing cables into a building or as a connection between several equipment locations. Wireless telecommunications networks are generally implemented and managed through radio communication. This implementation takes place at the physical level (layer) of the network structure of the OSI model.
Examples of wireless networks include cell phone networks, wireless local area networks (WLAN), wireless sensor networks, satellite communication networks and terrestrial microwave networks. Some examples of use include cell phones that are part of everyday wireless networks, allowing easy personal communications. Another example, Intercontinental network systems, use radio satellites to communicate around the world. Emergency services like the police use wireless networks to communicate effectively as well. Individuals and businesses use wireless networks to send and share data quickly, whether in a small office building or around the world.