4-Port Server Network Adapter / Standards: *IEEE 802.3 Ethernet,*EEE 802.3u Fast Ethernet, *IEEE 802.3 NWay 10/100 Dual Speed / Auto-negotiation: *PCI local bus 2.1, 2.2 specification / Bus Support: Auto-sensing PCI, bus mastering / Supplied Current: Up to 500mA bus-power supplied per port / Ports: Four IEEE 802.3u auto-negotiation ports / Wiring Topology: Star / Protocol: CSMA/CD / Network Data Transfer: Rate (per port) *Ethernet:*10Mbps half-duplex*20Mbps full-duplex, * -Fast Ethernet:* 100Mbps half-duplex, *200Mbps full-duplex / Network Media:*10 Base-T: *2-pair UTP Cat. 3, 4, 5 (100m), * EIA/TIA-568 100-ohm shielded twisted-pair (STP)(100m) / * -100 Base-TX: * 2-pair UTP Cat. 5 (100m), * EIA/TIA-568 100-ohm shielded twisted-pair (STP)(100m) / IRQ:     Auto-assigned by driver, I/O: Auto-assigned by driver / Diagnostic LED Report: * -100Mbps (on) 10Mpbs, * -Full/Half duplex