n this type of network, each workstation connected to the server using a concentrator. Each workstation are not interconnected. So every user who connects to the server will not be able to interact and do nothing before the server computer is turned on. When the server computer is turned off, then the entire network connections will be disconnected. When compared with the mesh system, this system has a level of complexity that is much simpler network so that the system becomes more economical, but the burden shouldered fairly heavy central hub. Thus the possibility of the level of damage or disruption of these larger central. Relationships between nodes will be done through a device called a concentrator. Each node is connected by cable to the concentrator. So, there is no relationship between the cable station. In the star topology, node additions do not interfere with the system that was working, just add cables from the node to the concentrator. Similarly, if one node disconnected the cable will not interfere with other nodes that are currently working.