A Record vs CNAME

[Pedro Marques]

Hi all,

I've been reading a lot about A Records and CNAME's, and there's obviously a
large number of different opinions, some say to not use CNAME's and use
always A Records, is this correct?

If so, what's the difference between this two records:

machine     IN    A       192.168.0.2
mail        IN    A       192.168.0.2

or

machine     IN    A       192.168.0.2
mail        IN    CNAME   machine.domain.com.


As far as I know, the only advantage of CNAME is that if I change the
machine IP address, I don't have to change any other record pointing to that
name, is that correct?

Thanks,

Pedro Marques
pedromarques at seara.com