According to Microsoft, if you want to enjoy the best possible Xbox One gaming experience, you should use IPv6. The Xbox One natively supports IPv6, but finding an ISP that will give you an IPv6 connection to the internet is difficult. By using IPv6 on your Xbox One, you should have less latency when playing multiplayer games, any data that you do transmit over the internet should be safer and more private, and in general any connections made by the Xbox One -- either to remote servers, or peer-to-peer -- should be faster and more responsive.