Connecting two Xbox consoles to each other without a switch requires a crossover cable, while Xbox 360 consoles can use standard cables. On the Xbox One, if one's console will not connect to their home Wi-Fi system, the best thing they can do is to factory reset the console and change their DNS resolver when the console is restarted and refreshed.
Joining two Xbox consoles together without a switch requires a crossover cable, whereas Xbox 360 consoles can use standard cables. If an Xbox One won't connect to its home Wi-Fi network, the best option is to reset the console and modify the DNS resolver upon restart.