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"This lesson describes both physical and logical organization of networks. Topologies described include bus, ring, star, and hybrid. This unit also covers TIA/EIA 568 structured cabling standards, which govern the installation of local area networks. In order to design, install, troubleshoot, and maintain networks, administrators must have a solid understanding of these topologies and cabling standards. Each computer on the network is connected to the other computers with cable (or some other medium, such as wireless using radio frequency signals). The physical arrangement of the cables connecting computers on a network is called thenetwork topology. "