[Wlug] CD/DVD-ROM question

I just noticed that my boot message tells me that my CD-ROM and CDRW drives are also DVD-ROM. I wasn't aware that either of them had that capability when I bought them. All those spam messages about reading DVD from my CD-ROM went in the trash without being read, so now I'm wondering. Is it possible to read a DVD on a CD drive? If so, how? If not, why does the boot message say that? Thanks. Greg