This topology is the variation of Star topology. This topology has a hierarchical flow of data.
In this, the various secondary hubs are connected to the central hub which contains the repeater. In this data flow from top to bottom i.e. from the central hub to secondary and then to the devices or from bottom to top i.e. devices to the secondary hub and then to the central hub. It is a multi-point connection and a non-robust topology because if the backbone fails the topology crashes.
Advantages of this topology :
* It allows more devices to be attached to a single central hub thus it decreases the distance that is traveled by the signal to come to the devices.
* It allows the network to get isolate and also prioritize from different computers.
Problems with this topology :
* If the central hub gets fails the entire system fails.
* The cost is high because of cabling.
