See Who's on My Wireless Network

What's a good way (better than airport utility) to view who is on my AEBS's wireless network, and kick them off?

I used the Airport Utility to see who was on my wireless network (image attached below) and I saw their was one other person besides me, in the pane I was looking at would it be showing a computers connected via ethernet and computers connected via WIFI or just WIFI?

Don't use an AEBS for my router, but if you've set up WPA2 encryption, there won't be anyone else on your wireless network unless you've given them the password.

If you haven't set up encryption, do it now. This will kick them off.

Most (but not all) wireless routers keep a log of the IP address who tried accessing it. Blocking it is just a matter of telling your router to. Of course this can be bypassed by people but lets hope they're not that smart

Ok thanks guys