After researching forum for my problem, it seems there is no particular
answer to it. I wanted to get work Knoppix 4.0.02 on my Sharp NoteBook
(AMD Sempron processor)
I am using ROUTETECH (i think it is router, it is connected to phone line and
it is connected to my PC though cable) which is produced in Korea,
I get nice internet connection in MS Windows environment.
Here is the IPCONFIGURATION in MS Windows:

IP address : 172.17.0.100
Subnet mask: 255.255.0.0
Default Gateway: 172.17.0.1
DHCP Server: 172.17.0.1
DNS Server 172.17.0.1

At start up line in Knoppix
About networking it says DHCP broadcasting for IP (backgrounding)
But after all, it didn't connect to internet. When I type some URL in Mozilla,
it says looking for www.* .

When I run a command ifconfig, it says

knoppix@2[knoppix]$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:400:75:41:1E
inet addr: 172.17.0.100 Bcast: 172.17.255.255
Mask : 255.255.0.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:11 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:2 dropped:0 overruns:0 carrier:2
collisions:0 txqueuelen:1000
RX bytes:1516 (1.4 kb) TX bytes:0 (0.0 KiB)

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:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes: 500 ( KiB) TX bytes: 500 ( KiB)

I don't know I have my network card is detected or not.
Please help me to solve this problem. I am quite a newbie to Linux and networking.
But I know some basics.

With Best Regards
Bataa