Machine to machine refers to direct communication between devices using any communications channel, including wired and wireless. In modern times the communication is often via the Internet of Things (IoT). Widespread adoption of Internet Protocol Version 6 (IPv6), with its extremely large address space, is necessary to accommodate all of the sensors and machine-readable identifiers that Internet of Things will require.

Machine to machine refers to direct communication between devices using any communications channel, including wired and wireless. In modern times the communication is often via the Internet of Things (IoT). Widespread adoption of Internet Protocol Version 6 (IPv6), with its extremely large address space, is necessary to accommodate all of the sensors and machine-readable identifiers that Internet of Things will require.