The Cisco GLC-SX-MM 1000BASE-SX Ethernet transceiver is a Duplex SFP transceiver for optical communications, rated for distances up to 500m and a maximum bandwidth of 1Gbps. Cisco's industry-standard SFP is a hot-swappable input/output device that plugs into a Gigabit Ethernet port/slot, linking the port with the fiber-optic network. SFPs can be used and interchanged on a wide variety of Cisco products and can be intermixed in combinations of IEEE 802. The 1000BASE-SX SFP, compatible with the IEEE 802. In this article, we will review the features, advantages, and benefits of the GLC-SX-MM, which, in turn, can help businesses. This Cisco® GLC-SX-MM compatible SFP transceiver provides 1000Base-SX throughput up to 550m over multi-mode fiber (MMF) using a wavelength of 850nm via an LC connector. The "MM" stands for.