![]() ![]() In the OSI model, these are defined at layers 1 and 2 - the physical layer and the data link layer.Ī widely adopted family of communication media used in local area network (LAN) technology is collectively known as Ethernet. The communication media used to link devices to form a computer network include electrical cable (HomePNA, power line communication, G.hn), optical fiber (fiber-optic communication), and radio waves (wireless networking). Nodes can include hosts such as personal computers, phones, servers as well as networking hardware. Network computer devices that originate, route and terminate the data are called network nodes. The connections (network links) between nodes are established using either cable media or wireless media. "In computer networks, networked computing devices pass data to each other along data connections. ![]()
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