When you use NAT, services such as TCP or UDP will be required. These services will be affected while using which makes them unstable. Also, incoming packets will have some issues while they try to reach their destination. We can stop this issue by configuring them with the NAT router.

ipv4 is not sustainable because use 32bit and ipv4 provide limited address.

ipv6 provides 128 bit address that enough of the company.

NAT is complex network design.

I have not questions this lesson.

thanks.