StarTech.com Dual Port Gigabit Network Server Adapter NIC Card 2 Port (ST1000SPEXDP) Add 2 Gigabit Ethernet ports from only a single PCIe slot in a full or low profile/small form factor (SFF) computer system, conserving expansion port availability Supports advance features such as Jumbo Frames and VLAN tagging for network optimization Backed by a StarTech.com 2-year warranty and free lifetime technical support Two 10/100/1000Mbps compatible RJ-45 Ethernet ports Jumbo Frame support On-chip 48KB Big Transmit/Receive Buffer Support Fully Compliant with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, and supports IEEE 802.1Q VLAN tagging, IEEE 802.1P Layer 2 Priority Encoding and IEEE 802.3x Full Duplex Flow Control Supports Microsoft NDIS5 Checksum Offload (IP, TCP, UDP) and Large send Offload