Ring topology

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Ring topology, as shown in Figure 1.5, is robust, while it does not have the complexity of the full mesh topology. Hence it is used in core transmission backbone networks.

Figure 1.5 A ring topology connecting six stations (Forouzan 2007, 12)

A comparison of the different physical topologies is summarized in Table 1.2.

Table 1.2 A comparison of different physical topologies
	Mesh	Star	Bus	Ring
Advantages	Robust, data privacy	Less costly than mesh, easier fault identification and isolation	Ease of installation, cost-effective for long line of devices	Better reliability than bus
Disadvantages	Complex and costly for a large number of devices	Hub failure causing total network breakdown	Difficult fault isolation, path break causing isolation into two groups of devices	Path break does not cause isolation into a dual ring
Application examples	Switching backbone connecting the main computers	Local area network in offices	Coaxial cable TV in households or buildings	Long haul transmission backbone network connecting cities

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Ring topology