The 4-port 10-Gigabit Ethernet switching module (WS-X6704-10GE) provides 4 switched, 10-Gigabit Ethernet ports. The four ports support hot-swappable 10GBASE-LR long-reach or 10GBASE-ER extended reach XenPak optical transceivers. The WS-X6704-10GE module has dual fabric channel interface and requires the Supervisor Engine 720.