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star topology
1. Star topology - : A network topology that has network hubs at the center, with
2. • Star (hub and spoke) A star topology uses a separate cable for each computer that runs to a central cabling nexus called a hub or concentrator
3. Most of the networking protocols that call for twisted-pair cable, such as 10Base-T and 100Base-T Ethernet, use the star topology
4. The physical network is actually cabled using a star topology, and a special hub called a multistation access unit (MSAU) implements the logical ring by taking each incoming signal and transmitting it out through the next downstream port only (instead of through all of the other ports, like a star hub)
5. • Hierarchical star The hierarchical star topology is the most common method for expanding a star network beyond the capacity of its original hub
6. Some forms of Ethernet use a bus topology, in which each of the computers is cabled to the next one in a daisy-chain fashion, while the star topology, in which each computer is cabled to a central hub, is more prevalent today
7. Token Ring networks use a logical ring, but the computers are actually cabled using a star topology
8. A bus topology, for example, means that each computer is connected to the next one, in daisy-chain fashion, while in a star topology, each computer is connected to a central hub
9. This requires twice as many links as a standard star topology but still fewer than a full mesh
10. • Fault tolerant UTP networks use a star topology in which each computer has its own dedicated cable running to the hub
11. Figure 10-3 10Base-T networks used a hub to connect all the network nodes in a star topology
12. Figure 12-1 Token Ring networks appear to use a star topology, but data travels in the form of a ring