In a star topology, each device has a dedicated point to point link only to a central controller, usually called a hub. These devices are not linked to each other. If one device wants to send data to another, it sends to the hub, which then relays the data to the other connected devices. In a star, each device needs only one link and one I/O Port to connect it to any number of other devices. This factor makes it easy to install and reconfigure. Far less cabling need to be housed and additions, moves and deletions involve only one connection between that device and the hub. However, reliability is low as hub failure disrupts the whole data transfer.
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