Can someone please help me. I seem to have lost my connection to halo 2. It said that I have no connection to a network device dsl or cable modem, router etc. What the heck is a ethernet straight through or cross over. What is an ethernet is it some kind of isp thing. My roommate just moved out and I think he took his equipment with him. I don't know what it was but it was blue/black in color and it connected some wires.