What DUPLEX am I running?

This is a discussion about What DUPLEX am I running? in the Windows Networking category; I am running Windows XP and am looking for a command or a place that will show me what duplex my NIC is using. I have it set to auto negotiate and would like to make sure it is negotiating correctly.

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I am running Windows XP and am looking for a command or a place that will show me what duplex my NIC is using. I have it set to auto negotiate and would like to make sure it is negotiating correctly.
 
Maybe even a small app that will tell me?
 
Any ideas?

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Oct 5
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Well, if you can see the back of the PC, there's usually a light on the NIC that shows when it's in full-duplex mode (or it could also be one light that has a different colour for full-duplex mode)
 
Your NIC driver may also have an applet that allows you to see what mode the card is running in too.
 
Rgds
AndyF