[David]

More detail: the coax cable comes directly to the cable modem from the supplier, no splits. The cable modem is in the bedroom where the cable enters the house. An ethernet cable goes from the cable modem to a Netgear wireless router about 20' away. Then 4 ethernet cables go back to the bedroom where the cable modem is with one of those 4 going out to the garage. So there are ethernet wires running all place upstairs.

Ideally I'd like those 4 ethernet cables to stay in the bedroom and only 1 ethernet cable leave the bedroom to the wireless device 20' away.