Hi Asi,
The first statement tells the ASA that a device with IP address 192.168.1.1 on the DMZ has to be translated to 192.168.2.200 which is on the outside. On the interfaces we configured to which security-zone it belongs (INSIDE, DMZ or OUTSIDE).
The direction doesn’t matter…from the outside you can connect to 192.168.2.200 and it will be translated to 192.168.1.1. When 192.168.1.1 initiates traffic that goes from DMZ > outside then it also gets translated to 192.168.2.200. The only thing the ASA cares about is what to translate.
The same thing applies to the second statement except that the first time when traffic goes from DMZ to OUTSIDE, an IP address from the pool is selected. When the translation is in place, you can also connect from the outside to the pool address if you want…the ASA only cares about what to translate.
Rene