The worlds consumption of IPv4 addresses has exhausted the RIRs resource pools of available IPv4 address space. By the end of 2015, every RIR, except AFRINIC, had allocated all their blocks not reserved for IPv6 transitioning. This has been anticipated since the late 1980s, and was one of the causes of making its successor protocol, IPv6. New and existing networks needs transition mechanisms to migrate away from IPv4, while at the same time maintain IPv4 connectivity. One of these mechanisms is MAP, Mapping of Address and Port, that makes it possible to have IPv4 connectivity to and across an IPv6 network. We'll look at how this mechanism affects the user quality of service, and see if there are any noticeable difference in performance using standard consumer CPE equipment.