designed for versatility and performance, the dge-550t adapter provides the following:
operability in both 32-bit, 33 mhz and 64-bit, 66 mhz slot servers
universal bus support, 3.3v and 5v
ipv.4 checksum task off-loading for checksum generation and verification
compliance with ieee 802.3ab 1000base-t gigabit ethernet standards ,ieee 802.3u fast ethernet standards and ieee 802.3 ethernet standards
plug-and-play installation
support for 802.1q vlan capacity
adaptive inter frame spacing (ifs) capacity
auto-assignment of irq numbers and io address
full-duplex gigabit ethernet interface that delivers 2gbps aggregate bandwidth
one built-in rj-45 connector
support for gigabit ethernet over standard category 5 and 5e utp wiring for distances up to 100 meters
auto-negotiation to the highest available speed
four led indicators:
link/activity, full duplex, 1000mbps, 100mbps
driver↑

support for:
√ redhat linux 6.0/6.1 √ linux os kernel v2.0/2.2
√ windows nt 4.0 √ windows 2000
√ windows 98 √ novell netware 5.1 odi3.0

check http://www.dlink.com for newest release of drivers.