I don't know if this is the correct place for this question however, I'm living in a dorm with my roommate and their is only one access for a Ethernet cord. We have a Ethernet cord spliter and we are both plugged in from the same source. One day his computer just stopped connected to the internet with an error stating, "Ethernet does not have a valid IP Address" Where my computer never had any issues. He is able to connect to the network wirelessly, however still has issues using the ethernet cord.