What is a switch?


 A switch is a network device used to forward electrical signals. It can provide an exclusive electrical signal path for any two network nodes connected to the switch. The most common switch is an Ethernet switch. Other common ones are telephone voice switches, Fiber optic switches, etc. Exchange is a general term for technologies that send the information to be transmitted to the corresponding route that meets the requirements by manual or automatic equipment according to the needs of transmitting information at both ends of the communication.



Switches can be divided into wide area network switches and local area network switches according to different working positions. The wide-area switch `and is applied at the data link layer. The switch has multiple ports, each port has a bridging function, and can be connected to a local area network or a high-performance server or workstation. In fact, switches are sometimes called multi-port bridges.

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