Cisco 1G SFP modules are high-performance, cost-effective transceiver modules for Gigabit Ethernet applications. They are compliant with the IEEE 802.3z 1000BASE-SX standard and support a maximum data rate of 1.25Gbps. These modules are hot-swappable and can be used with Cisco switches and routers. They are designed to provide reliable and cost-effective connectivity for short-range applications. The modules are available in a variety of form factors, including SFP, SFP+, XFP, and X2. They are also available in a variety of wavelengths, including 850nm, 1310nm, and 1550nm.