Promiscuous mode use when network uses a switch (not hub)

acomberacomber Registered Users Posts: 3 ■□□□□□□□□□
I understand that it is possible for software to put a network card into promiscuous mode so that ALL packets received on the network interface are transmitted to the cpu rather than JUST packets destined for THIS computer.

And I can understand how this could be useful for packet sniffing, eg, to detect which clients are connecting to which servers, and all sorts of troubleshooting stuff like that.

But, what if the computers are connected via a switch. I am thinking about an ethernet network here. With a switch, it has its own 'intelligence' and will not send frames to computers for which the destination is not it. Is that correct?

So then how do you do packet sniffing on a network with a switch?


Sign In or Register to comment.