(Optical fiber connectors (also known as fiber jumpers) refer to the fact that connector plugs are installed at both ends of the light to realize the flow connection of the optical path; the transceiver wavelengths of the optical modules at both ends of the fiber jumper must be the same, that is to say, the two ends of the optical fiber must be For optical modules of the same wavelength, the simple way to distinguish them is that the colors of the optical modules should be the same. Under normal circumstances, short-wave optical modules use multimode fibers (orange fibers), and long-wave optical modules use single-mode fibers (yellow fibers) to ensure the accuracy of data transmission.)