It provides a cabling system which allows information and resources to be shared between many users.
Star networks use a central computer through which all messages are routed.
All workstations and peripherals are linked to the central host computer, which controls the activities of the network. Ring networks link all workstations together in a circular manner. Each member of the loop or ring can process data directly as well as share applications and data along the network. Bus networks use a single two-directional cable, capable of sending information between the two attached devices very quickly. There is no central computer which controls the network's activities.