Shenzhen Pulink Technology Co., Ltd. ("TP-LINK" for short) is the world's leading supplier of network communication equipment. TP-LINK products cover Ethernet, wireless LAN, broadband access, and power line communications. In addition to the existing main core areas such as transmission, switching, and routing, it is gradually entering fields such as mobile Internet terminals, digital homes, and network security. Therefore TP-LINK is a company brand.

A hub, also called a multi-port repeater, only amplifies and broadcasts data signals. Note that there is a difference between broadcasting and forwarding. It is a physical layer device that does not perform any operations on the data stream and only amplifies electrical signals.

The router must be powerful, because with the router, there is the Internet. The router forwards data based on the IP address. It determines which port the data is forwarded from by querying the routing table.

There is also a device called a switch. A switch is more advanced than a hub. It forwards data based on the MAC address and the MAC address table. It works at the data link layer.

Hubs and switches are generally used to build LANs, but hubs are not a good device. A few hosts are fine. If there are too many hosts, hubs will cause the network to slow down. Because hosts connected to the same hub share the bandwidth, the more hosts there are, the smaller the bandwidth of each host. Switches are much better, and switches are recommended for component LANs.

What wardwu73 said is very unreliable. You can know the difference between routers, switches and hubs after you learn more about the functions of each device.