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Suppose i am connected to two networks-

  1. DSL connection.

2.Mobile broadband.

Which one will be considered as the base one and will be used??

Because both do get connected at the same time..!!

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up vote 3 down vote accepted

The one with a 'better' gateway metric will be chosen. To find out which one it is, open terminal and type this:

route -n

I see that I have a gateway with metric         UG    0      0        0 eth0

So eth0 is my preferred adapter.

Another (probably easier) way to find out is to look at the route to Google's DNS server (

ip route get

This is my output: via dev eth0  src 

You can see that it is going via eth0. Try this on your machine and have a look at the results.

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Thanx a lot..!! This Question was storming my brains from long...!! Also,is there absolutely no way that the connection is shared by both connections?? So that bandwidth increases?? i read a post already here...but just asking that is there absolutely no way to do it?? – Nirmik May 19 '12 at 16:52
There is a way to do it, it's referred to as NIC Bonding (I think it has many other synonyms). I've never done it but there's a help page on the Ubuntu Help Wiki: – Mendhak May 19 '12 at 18:19
Thanx a lot..!! that was helpfull..!! :) – Nirmik May 19 '12 at 18:25

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