Matt wrote:

> I have a question about sniffing on networks. I know that it is possible
> to sniff on a wired network, even without an IP address, and i know it is
> possible to sniff on an unencrypted or encrypted wireless network, but is
> it possible for someone to have cracked my WEP key, sit on my network and
> sniff
> or communicate on my network w/o an IP address? Using a wireless IDS
> (kismet), i can see that my access point has packets going through the
> air,
> even though my laptop is turned off. I checked in my linksys web-based
> management page and there are no other MAC addresses assigned. someone
> could be using a static IP, but can they be listening or communicating w/o
> an IP address?

Yes, it is possible for someone to intercept your signal, without you
knowing about it and it's also possible to break WEP.