MAC address spoofing - conflict?

[penetrationtestmail () gmail com]

Hi,

Let's say you're wardriving, and you find an open network which has MAC address filtering enabled. There is one active 
client on the network. You insert BackTrack, start Kismet and find out the client's MAC address. Then, you change your 
MAC address to mimic the client's, and connect to the network.

What happens? Do you kick the other client off, or do both clients conflict with each other because their MAC addresses 
are the same? Or does something else happen? I'm sorry I can't check this at the moment, but I do not have a wireless 
network to test it on.

Thanks in advance,

Flail

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