The PRO/1000 PT Quad Port Server Adapter from Dell enables you to access multiple network segments. The dedicated input/output (I/O) bandwidth of PCIe ensures priority performance on each port ??? without bus sharing ??? for Gigabit Ethernet connectivity in Category-5 networks. It supports both half and full duplex modes for 10/100Base-T and full duplex only at 1000 Mbps. The Intel PRO/1000 adapters fully support implicit and explicit VLANs. Additionally, the Server Adapter enables Intel?? I/O Acceleration Technology (Intel I/OAT) for fast I/O processing. This product has been tested and validated on Dell systems to ensure it will work with your computer. It is supported by Dell Technical Support when used with a Dell system.