As succinctly as possible, I've got an alum iMac as my primary machine. My internet (verizon Fios) runs from the verizon modem through a (current) airport extreme. iMac is connected to airport extreme by ethernet cable. The airport is broadcasting wirelessly for my MacBook, iPhone, Apple TV, etc.
I want to run the iMac off of the wired connection to maximize speed. However, I also need it to be on the airport network so that it can communicate with the
TV and broadcast over airtunes to some remote speakers.
Question: If the iMac is connected both wireless and by ethernet, which connection is being used? Also, how can I ensure that it is using the (faster) wired connection whenever possible?
gracias
I want to run the iMac off of the wired connection to maximize speed. However, I also need it to be on the airport network so that it can communicate with the

Question: If the iMac is connected both wireless and by ethernet, which connection is being used? Also, how can I ensure that it is using the (faster) wired connection whenever possible?
gracias