Many thanks! Its a good keyword to start my search!
I learned quickly that there is 2 systems:
1. Combining Bandwidth.
2. Load Balancing two connections.
Let assume that you have two 3Mb/sec. connections each capable to download at 300KB/sec.
With Combined Bandwidth you should be able to download one file at 600KB/sec.
With Load Balancing one single file will not exceed download speed of 300KB/sec. However you can download 2 files at 300KB/sec. or 4 files at 150KB/sec. etc.
source:
http://www.ezlan.net/loadbalance.html
Its interesting though I did not know!
So apparenlty the only solution for all is the load balancing, as the combined requires specific professional connection!!
I don't know I might have a cable connection faster than 100mbps actually...at work!
(not the wifi though, its really slow)
But then my device (ethernet card broadcom) is only 100mbps max!