Cisco Line Card - For Data Networking, Optical Network - 32 x 25GBase-X Expansion Slot, 16 x 50GBase-X Expansion Slot, 2 x 400GBase-X Expansion Slot - Optical Fiber25 Gigabit Ethernet, 50 Gigabit Ethernet, 400 Gigabit Ethernet - 25GBase-X, 400GBase-X - 400 Gbit/s - 50 x Expansion Slots: