portsnap and cvsup for rebuilding world - Which one?

[frzburn]

Hi everyone,
I'm a new FreeBSD user, but a veteran Linux user ;)
I'm using FreeBSD 6, and I was wondering while I gave a try to rebuilding
``world'' how to properly synchronize my source. Here's what I mean:

After my successful installation of FreeBSD, I looked on
www.bsdguides.orgfor some tips and... guides. So I learned how to
properly keep my port tree
updated with portsnap, with the help of this guide:
http://www.bsdguides.org/guides/freebsd/beginners/portsnap.php. It says that
portsnap is the ``new'' method to keep your ports tree up to date.

After that, I looked for how to update FreeBSD with the latest packages from
the STABLE branch. So I looked at the handbook, in the section 21. The
section 21.3 (
http://www.ca.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html)
tells us how to ``synchronize my source''. But it only talks about cvsup
(and others), not about portsnap. But cvsup is considered obsolete by
BSDGuides.org...

So here come my questions:
Is portsnap syncing the sources correctly for rebuilding world, or must I
use cvsup?
If so, of what use is portsnap if I must use cvsup for synchronizing my
source?


In fact, I'm just looking at the most up-to-date/approved/correct
technique/tool to synchronize my source for ``rebuilding world'' with the
latest sources from FreeBSD-6-STABLE.

Thanks a lot!! =)

frzburn