The SFP port is a built-in optical port of a Gigabit Ethernet switch, so it cannot be directly connected with a twisted pair or a jumper. It needs to be connected to an optical module first, and then it can be transmitted with an optical fiber patch cord. Fiber optic cabling is increasingly used to connect network switches and other datacom equipment, especially in long-distance and mission-critical applications. Traditionally, network switches have been connected using copper cables, but with the increasing demand for high-speed and reliable connectivity, fiber optic cables have. SFP transceiver modules are specific to the type of fiber being connected (either single mode or multimode).
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