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Bus topology, as shown in Figure 1.4, is used for end-point devices. For example, bus topology is used to chain a printer with a less critical device at the tail. It allows ad hoc modification of a network's structure. In the early 1990s, bus topology was common for connecting PCs to a LAN server using shielded coaxial cable. Details of coaxial cable will be discussed in Unit 2. But nowadays, most PC and LAN connections use star topology. Bus topology is used in cable TV distribution in residential blocks.
Figure 1.4 A bus topology connecting three stations (Forouzan 2007, 11)
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