Router (Router) is a device that connects to various local area networks and wide area networks in the Internet. It automatically selects and sets routes according to the channel conditions, and sends signals in the best path and in order. The router is the hub of the Internet, the \"traffic police.\" At present, routers have been widely used in all walks of life, and various products of different grades have become the main force in realizing various backbone network internal connections, backbone network interconnections, and backbone network and Internet interconnection services.