The HP NC1020 Gigabit Server Adapter is a 32-bit, 33/66 MHz, single port, Ethernet adapter that delivers up to 1000 Mb/s Ethernet over twisted-pair (copper) Category 5 or better cabling. The NC1020 Gigabit Server Adapter has a fully integrated controller capable of auto-negotiating a link at 10, 100, or 1000 Mb/s. The network connection is made through an RJ-45 connector. LED indicators show the link and activity.