Internet Protocol version $6($IPv$6)$ is the next$-$generation Internet Protocol version designated as the successor to IPv$4$ because IPv$4$ address space is being exhausted. Which one of the following descriptions about IPv$6$ is correct?

Group of answer choices

Addresses are not hierarchical and are assigned at random.

Broadcasts have been eliminated and replaced with multicasts.

There are $2\mathrm{.}7$ billion available addresses

An interface can only be configured with one IPv$6$ address.