SFP slot, supports the following transceivers: Mini GBiC1000SX multi-mode, 1000LX single-mode, 1000BX single-mode WDMLayer 2 Features: IEEE 802.3x Flow Control - IEEE 802.1q VLANSupports receiver scaling (RSS, supports IPv4, IPv6 protocolsSupport 9K jumbo frame, support checksum offloadNetwork Type: 1000Base-/1000Base-LX, Main Controller: For I210ASBus card slot: mini PCIeTransmission medium: 1 x SFP fiber interfaceTransmission rate: 1000MbpsNetwork topology: IEEE802.3z 1000BASE-X Gigabit EthernetIEEE 802.3x Full Duplex and flow controlIEEE 802.3ad Link aggregation for parallel linksIEEE 802.1Q VLAN, IEEE 1588IEEE 802.3az - Energy Efficient Ethernet (EEE)Features: Support PXE, DPDK, , iSCSI, FCoE, Jumbo Frame, etc.Colour:blackMaterial:PCBPackage Contents:1 x Main Card1 x Card1 x CD1 x 10-Pin Cable1 x SATA Data Cable1 x Half Height BezelOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.