How to connect 2 broadband at a time

This topic has been moved from the section Windows 7 to section Networking by Nikorr

Do you mean connecting 2 computers to a broadband modem using a hub? If so, you can't use both computers at the same time due to network address problems. You need to address the modem from the computer you are using

i have 8 units of pc but im using only one switch hub.i want to use 2 broadband router but the same isp, im confusing how to connect it to switch hub

If you have 8 computers then you need to replace your hub with a router and a switch.

This would give you modem>router>switch and will allow you to share the internet connection with the 8 computers.

Depending on your ISP the modem might be a combined modem/router - in which case replace the hub with a proper switch.