1.Switch, "switch," is a network device for the transmission of electrical (optical) signals. It can provide an exclusive electrical signal path for any two network nodes of an access switch. The most common type of switch is an Ethernet switch. Other common switches include telephone voice switches and Fibre Channel switches.

2.Switching refers to the technology that sends the information to be transmitted to the corresponding route that meets the requirements according to the needs of both ends of the communication. Switches can be classified into WAN switches and LAN switches based on their working locations. The wide area switch is a device that completes the information exchange function in the communication system. It is applied in the data link layer. The switch has multiple ports, each with a bridge capability, that can connect to a LAN or a high-performance server or workstation. In fact, a switch is sometimes referred to as a multi-port bridge.

3.A network switch is a device that expands a network and provides more ports in a subnetwork to connect more computers. With the development of communication industry and the advancement of information technology in national economy, the market of network switch is rising steadily. It is cost-effective, highly flexible, relatively simple and easy to implement. Ethernet technology has become one of the most important LAN networking technology, network switch has become the most popular switch. 

4.Switch is the English name of the switch. This product is an upgrade from the original hub, and there is no big difference between it and the hub in appearance. Because both ends of the communication need to transmit information, and through the device or manual to transmit the information to meet the requirements of the standard of the corresponding router, this technology is the switch technology. In a broad sense, in the communication system for information exchange function of the equipment, is the switch.