As late as the year 2000, updating the BIOS of your motherboard was a risky endeavor that could only be done with a floppy disk and drive, and required knowledge of the DOS prompt and command line syntax. In order to ease things, motherboard manufacturers started to incorporate simpler means of updating the BIOS without needing a floppy disk or drive. Asus is one such company, using an interface that they call EZ Flash, which can boot the PC to a level capable of reading from a CD or USB flash drive to update the BIOS quickly and easily. The M2N-MX is one such motherboard that has EZ Flash.
