Shadow wrote:
> I have a wireless PCI card based on a ralink RT61 chipset in
> an old PC. It is connected to an antenna on top of my roof. There are
> no ralink software or drivers on that PC.
>
> So what does the card do ?

Sit there absorbing a small amount of electricity. :-)

Without drivers, its doing nothing. However are you /sure/ there are no
drivers? If its a Windows PC it may have builtin drivers for the card.
In which case it's probably active, trying to find an AP to connect to.

> Does it transmit its MAC address ?

If you activate it in infrastructure mode, then it'll periodically send
out broadcasts which will contain its MAC.

> Wandering about security issues ....

If security is an issue, disable or remove the card.