I connect a LAN cable to the iMac and , at the same time, turn on the AIRPORT of it and it connects properly. I wonder which network the iMac will choose to use in this situation when I connect both. Both network come from the same Modem which simultaneously provides wired and wireless functions. More interesting, when I use Slingbox for TV on iMac, Mere WIFI connection is even faster than mere LAN connection (mere WIFI provides higher KBPS). Why?