Which statement best describes Network Address Translation $($NAT$)?$

Question $89$ options:

It is used to extend the IPv$4$ address space without IPv$6$

It is a process where IP datagrams are fragmented and reassembled

It is used to check the integrity of IP datagrams

It allows private IP addresses to be translated to a single public IP address

It defines the flow of packets in a network

It enables the assignment of unique IP addresses to every device