The main functions of the hub are as follows:

The received signal is regenerated, shaped and amplified to expand the transmission distance of the network, and all nodes are concentrated on the node centered on it. Hub is a connecting device used in LAN, which has multiple ports and can connect multiple computers. In local area network, hub is often used as the center to connect all scattered workstations with servers to form a star-shaped local area network system. Features of the center:

In addition to interconnecting multiple terminals, the hub will not affect other nodes when the line of one node fails. Hub belongs to the basic equipment in data communication system. Like twisted-pair transmission media, it is a hardware device that needs no software support or little management software. Widely used in various occasions. Hub works in LAN environment like network card, and is applied to the first layer of OSI reference model, so it is also called physical layer device. The hubs are electrically interconnected. When the environment for maintaining LAN is logical bus or ring structure, a physical star or tree network structure can be established with the hub.