hmm, I didn't know pvc had two modes. I was under the impression that was
the only mode as it is a permanently established virtual
circuit. So possibly the two modes for a PVC are simply...it's existence or
lack of....
Frame Rely: I believe that frame relay was originally conceived as a
protocol
for use over isdn interfaces and then somewhere along the line became an
industry standard for wan data transfer and was meant to be a replacement
for
x.25. So, actually, it is the name of a protocol for wan technology and
also,
it is a protocol type.
As far as fully meshed vs partially mashed, I believe that when using frame
relay these are your two topology choices. A fully meshed network means
that
there is a PVC to every device on a multipoint wan. On this type of network,
any update is seen by every device and this type can also be thought of as
'one data link.' And a partially meshed network is just a star topology.
So,
I would think the answer is fully meshed uses more PVC's since there are
more
established and permanent connections.
Someone else can probably help you out in more detail. I am a book learner
and do not have actual hands on experience in this. I am not sure about
your
other question and would hate to misdirect you.
Jennifer Cribbs
Have a great day!
Jenn
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