This topic is to discuss the following lesson:
If always the 1st rule will be used for NAT then, what is the use of the 2nd rule, please?
For traffic that originates from S1 and goes to the Internet, it will always use the first NAT rule. But for traffic coming from the Internet, the translation works for both 192.168.12.100 and 192.168.13.100.
So the benefit of the second command is for incoming traffic.
I hope this has been helpful!