2 high performance 2.5 -Gigabit LAN ports; 10/100/1000M/ 2.5G bps data rate auto negotiation operation; Supports 1-Lane 2.5 /5Gbps PCI Express Bus; Compatible with IEEE 802.3, IEEE 802.3 u, IEEE 802.3 ab; Supports Full Duplex flow control (IEEE 802.3 x); Supports jumbo frame to 16K byte