Final answer:
All of the listed operating systems, Windows, Linux, Mac OS, Android, and iOS, fully support IPv6. Modern versions of these OS come with IPv6 support already included, but it must be enabled and configured on the network for use.
Step-by-step explanation:
The student has inquired about which operating systems fully support IPv6. All listed operating systems: 1) Windows, 2) Linux, 3) Mac OS, 4) Android, and 5) iOS, have support for IPv6. All modern versions of these operating systems come with built-in IPv6 support, although it must be enabled and configured properly on the network to fully utilize its capabilities. IPv6 is the most recent version of the Internet Protocol which was developed to address the limitations of IPv4, including the shortage of available IP addresses.