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Star-Bus Hybrid Topology

Modern networks combine the logical communications of a bus with the physical layout of a star, called the star-bus hybrid topology. This is also called the star-wired bus topology. In this network design, each finger radiating from the star is like a separate logical bus segment, but with only one or two computers attached. The segment is still terminated at both ends, but the advantage is that there are no exposed terminators. On each segment, one end is terminated in- side the hub or switch and the other is terminated at the device on the network.

Another advantage of the star-bus network design is that you can connect multiple hubs, switches, or routers to expand the network in many directions, as long as you follow standard network specifications for communications cable distances, the number of hubs or switches, and the number of devices attached. The connection between hubs or switches is a backbone that typically enables high-speed communications between the hubs or switches. A backbone is a high-capacity communications medium that joins networks and central network devices on the same floor in a building, on different floors, and across long distances.

Hubs, switches, and routers are available with built-in intelligence to help detect problems. Also, there are expansion opportunities for implementing high-speed networking. Because this is a popular network design, there is a wide range of equipment available for bus networks in the shape of a star.

Published on Mon 27 March 2006 by Adi Wagstaff in Networking with tag(s): star bus