Network Card Status

To find details about your network card

dmesg | grep eth0

Example:

eth0: Tigon3 [partno(BCM95721) rev 4201 PHY(5750)] (PCI Express) 10/100/1000Base-T Ethernet 00:19:xx:xx:xx:xx
eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] WireSpeed[1] TSOcap[1]
eth0: dma_rwctrl[76180000] dma_mask[64-bit]
tg3: eth0: Link is up at 100 Mbps, full duplex.
tg3: eth0: Flow control is off for TX and off for RX.
eth0: no IPv6 routers present