Which problem does IPv$6($Internet Protocol version $6)$ help to solve? Internet Protocol versions prior to version $6$ haven't achieved widespread use. There are less than $4\mathrm{.}3$ billion IPv$4$ addresses, which has already been exceeded with existing websites. Companies waste hundreds of public IP addresses. With IPv$6,$ they can use just one IP address. IPv$5$ is an outdated protocol version with insufficient security safeguards.