I have been reading the below link, and got few question.
What I understand?
Static Nat -> Just a one to one mapping between public and private IP. Only One Private IP. So,
X.X.X.123:100 -> Y.Y.Y.Y:123 X.X.X.124:100 -> Y.Y.Y.Y:123 X.X.X.125:100 -> Y.Y.Y.Y:123
Dynamic NAT -> This still makes one to one mapping, but the public address are from NAT pool.
X.X.X.123:100 -> Y.Y.Y.Y:123 X.X.X.124:100 -> Y.Y.Y.Y+1:123 X.X.X.125:100 -> Y.Y.Y.Y+2:123
1) What is that we achieve with Dynamic NAT with different IP address mapping?. I mean, i am unable to understand the sole use of Dynamic NAT over Static NAT? What is that the problem solves this Dynamic NAT?