What is the midline of building a monitoring system with a webcam? Do you need any hardware equipment?

Network monitoring system needs to use network cable for line transmission, which is within 100M. If it is far away, optical fiber equipment may be needed. Although there is a device called "network HD video expander" on the market, it has not been out of the market for a long time, and it is absolutely no problem to use, and its stability has not been recognized. Switches will also be used, and gigabit switches may be used to converge to the back end because of the large scale. If you use optical fiber, you need an optical fiber transceiver!