CentOS

When i assign ip address to anaconda, by hitting tab after booting from CentOS CD, and enter "IP= subnet= gateway =" this IP address remain configured on the system after finishing installation, my question is where its saved ? i assigned this IP address to the system before Anaconda configure anything on system before formatting partitioning the hard disk and so on , so how and why the system keep the IP settings after finishing the installation ?

It has always worked that way. If you perform the installation using DHCP then the installed system will also use DHCP. If you give it a fixed ip address then it will use that. It's stored in the same place as usual - /etc/sysconfig/network-scripts/ifcfg-$interface.

Thank you!