Every Internet-connected computer, smartphone, car, gadget and gizmo is assigned a four-digit IP address that lets it communicate with the net, thanks to a system known as IPv4 (Internet Protocol version 4). And the flood of new gadgets means we're running out of those addresses. [...]
Web developers have tried to compensate for this problem by creating IPv6 -- a system that recognizes six-digit IP addresses rather than four-digit ones.
(для не-компьютерщиков: это забавный своим идиотизмом бред, путающий все на свете).