I hope this gives you enough info.

knoppix@Knoppix:~$ ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:14 errors:0 dropped:0 overruns:0 frame:0
TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)

knoppix@Knoppix:~$ netcardconfig
ifconfig eth0 192.168.2.101 netmask 255.255.255.0 broadcast 192.168.2.255 up
route add default gw 192.168.2.1
Setting Nameserver in /etc/resolv.conf to 192.168.2.1
Done.
knoppix@Knoppix:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:0B:6A1:F7:30
inet addr:192.168.2.101 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: fe80::20b:6aff:fed1:f730/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:2758 (2.6 KiB)
Interrupt:21 Base address:0xd800

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:14 errors:0 dropped:0 overruns:0 frame:0
TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)

knoppix@Knoppix:~$ lspci
00:00.0 Host bridge: ALi Corporation M1689 K8 Northbridge [Super K8 Single Chip]
00:01.0 PCI bridge: ALi Corporation AGP8X Controller
00:02.0 PCI bridge: ALi Corporation M5249 HTT to PCI Bridge
00:03.0 ISA bridge: ALi Corporation M1563 HyperTransport South Bridge (rev 70)
00:03.1 Bridge: ALi Corporation M7101 Power Management Controller [PMU]
00:04.0 Multimedia audio controller: ALi Corporation M5455 PCI AC-Link Controller Audio Device (rev 20)
00:0d.0 Ethernet controller: ALi Corporation ULi 1689,1573 integrated ethernet. (rev 40)
00:0e.0 IDE interface: ALi Corporation M5229 IDE (rev c7)
00:0e.1 Mass storage controller: ALi Corporation ULi 5289 SATA (rev 10)
00:0f.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
00:0f.1 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
00:0f.2 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
00:0f.3 USB Controller: ALi Corporation USB 2.0 Controller (rev 01)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Miscellaneous Control
01:00.0 VGA compatible controller: ATI Technologies Inc RV350 AR [Radeon 9600]
01:00.1 Display controller: ATI Technologies Inc RV350 AR [Radeon 9600] (Secondary)
knoppix@Knoppix:~$

According to windows XP the ethernet card should show Uli 5263.
I tried finding a driver for it but the only one i found needs something called tulip which i don't have in knoppix.
Any ideas?