Industrial switch is a special type of ethernet switch for common switches. In a broad sense, if it supports wide temperature, it can be called an industrial switch, but it is generally called a "fake industrial switch". In a narrow sense, an industrial switch needs to support certain dust-proof and waterproof functions in addition to wide temperature. It also needs to support industrial features such as POE power supply, fanless design, etc. Based on different application scenarios, even an industrial switch sometimes needs to support explosion-proof functions.