Cisco 25/50GBASE-SR SFP56 Module for MMF - For Data Networking, Optical Network - 1 x LC/PC 50Gbase-SR-S Network - Optical Fiber - 0 mil, 0 mil, 0 mil Wavelength - Multi-mode - 25 Gigabit Ethernet, 50 Gigabit Ethernet - 50GBase-SR-S0.10 km Maximum Distance: