Quick Reference Search Tool Webopedia Jobs Link to Us Advertising Tech Support Submit a URL Request a Term Report an Error Internet News Internet Investing Internet Technology Windows Internet Tech. There are four principal topologies used in LANs. All devices are connected to a central cable, called the bus or backbone .
Bus networks are relatively inexpensive and easy to install for small networks.
Ethernet systems use a bus topology. All devices are connected to one another in the shape of a closed loop, so that each device is connected directly to two other devices, one on either side of it. Ring topologies are relatively expensive and difficult to install, but they offer high bandwidth and can span large distances. All devices are connected to a central hub . Star networks are relatively easy to install and manage, but bottlenecks can occur because all data must pass through the hub.