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Re: [PLUG] "evils of PPPOE"
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| > By the way, the article used PVC several times. What does it mean?
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| Uh, plastic pipe? Beats me.
close.
Permanent Virtual Circuit
a virtual data pipe from your DSL "modem" to your ISP's router.
DSL is typically deployed as ATM over DSL.
ATM is a switched technology. with lots of devices
and switches all wired together (a "cloud").
in ATM you cannot talk to just anyone on the network,
all communication is between 2 endpoints over end-to-end
virtual data paths (Virtual Circuits (VC)). VCs exist in
2 types Permanent (PVCs) and Switched (SVCs).
in a PVC, the endpoints are predetermined and fixed
(and work like a plastic pipe).
in a SVC, the VC and endpoints are created dynamically (on the fly)
(much like a phone call).
--jeff
see also:
www.atmforum.org
http://www.cisco.com/pcgi-bin/Support/PSP/psp_view.pl?p=Internetworking:ATM:ATM_General
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