network issues

after reinstalling ubuntu my internet won't work properly.

the problem is that I get disconnected aftersome time on the net and I have to restart my net work to get back again.

I'd appreciate if I got help asp.


Thanks

How about some information about how you're connected up to the internet?

• How did you set your machine's IP address?
• What devices are between you and the internet?
• How many network interface cards (including wireless) are in your system?
• How did you connect to make that post? What are the settings on that machine?