IP address that are permanently assigned.

Four$-$decimal notation such as $182\mathrm{.}124\mathrm{.}7\mathrm{.}9.$ This allows for approximately $4$ billion IPV$4$ addresses.

Uses a format such as $2001$:$0$db$8$:$85$a$3$:$0000$:$0000$:$8$a$2$e:$0370$:$733$

$4$ and can accommodate at least $340$

undecillion addresses.

Allows IP addresses to be translated in to recognizable words which are much easier to remember than a set of numbers.