CG-NAT (Carrier Grade Network Address Translation) is a fourth version IP address translation mechanism that allows you to simultaneously serve a larger number of connections and simplifies the transition to IPv6. It is also called large-scale NAT.
DPI traffic filtering
The technology allows the provider to broadcast the public IP address of the fourth version to several clients at once. This approach saves the list of public addresses due to the general shortage.
In the future, it becomes much easier to transfer clients to use the IP protocol of the sixth version.