Sorry i am not clear about my connection. Let me make it in detail.
"I too have internet access w/ cable.
I too don't have to log into my ISP. I too am connected via Ethernet to a router which in turn is connected to a modem which in turn is connected to the ISP. And if I want to exchange files, use netmeeting, etc.,
w/ a friend across the internet, I don't have any problems either EXCEPT I'm limited in terms of performance on my downlink based on my friend’s performance on his uplink, and who is otherwise configured similarly. "
- In my cable net if i want to access the internet i need to log in to my isp with a specific username and password. The rest is same as u said. Now my friend is also using the same service ( which is 512 kbps internet connc ) but as we are using same ethernet we thought we can bypass the isp and make direct lan for data transfer. So hes not accross internet but hes in my lan. Thats why i expected greater data transfer speed from his machine to mine. And we can connect each other without even logging in my isp and the speed in which i am downloading file from him ( 3-4 mbps) is far greater than my isps internet download speed (80-100 kbps). So i figured its just working like a local lan and not internet.
I was saying all the information cause i thought they might be relevant in some way. But what i mean here since we are not logging in our isp during file transfer our internet access is disabled. So "this has nothing to do w/ any internet connection whatsoever and it’s a network connection on the same local network (in which case I could see the relevance of Ethernet)" - this is exactly whats going on i think. Otherwise i would never get that much download speed ( which i didnt get from internet ). Now the problem is my friend doesnt hav the same download speed at the same way, when i send him any file. ( his speed stays around 100 kbps whis is still greater than his internet speed ).
Now i went thorough some previous post in this forum about difference in speed over lan and most of them were talking about the NIC configurations. I dont know may be there are something wrong there.
I will ask my friend to do the speed test and then publish the result soon. But again as we are not required to access the internet while file transferring, i dont think we r limited to our internet speed.
Thanks eibgrad for trying to help me here and sorry if i didnt make much sense before