MAC Address and Serial Number with delivered Modules

Hello!

I would like to ask about MAC address and the serial number. are they supplied in the preinstalled linux?

Every module comes with a serial number and a MAC address stored at Config Block (special section of Flash memory).
Config Block is preserved during normal system update. So a boot loader (UBoot/Eboot) and an OS (Linux /WinCE) have access to it “out of box”.