I have a wifi broadband router, an iMac and PC Router = 192.168.1.1 iMac wifi = 192.168.1.4 iMac ethernet = 192.168.2.4 PC wifi = 192.168.1.2 PC ethernet = 192.168.2.2 I have a crossover cable connecting the 2 machines. The idea being they should be able to swap files over the ethernet cable fast and still access the internet via the router. It works fine on the mac side. The problem is on the Windows machine if I browse //192.168.2.4/mark/ at first it will be at ethernet speed, but after a couple seconds it will slow to wifi speeds. How can it be using the wifi interface when I am browsing the IP 192.168.2.x? given wifi is on 192.168.1.x?