The network switch is an information exchange module that undertakes the network access of terminal equipment. Up, you can connect the terminal equipment computer, network server and other switches. In series, it can be connected to produce high availability effects such as cascade and double machine thermal difference. In management, you can connect and manage out of band network switches according to the control panel. The details are as follows: 1. Left and right data connections. The network switch is connected up to the network switch or wireless router, and down to the computer, network server or external equipment. Generally, RJ45 network cable can be connected immediately, or SFP optical cable can be used. ① RJ45 network