Re: Is it possible to bridge three NIC on a Windows 2000 Server
From: Phillip Windell (_at_.)
Date: 02/17/05
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Date: Thu, 17 Feb 2005 08:51:56 -0600
"Herb Martin" <news@LearnQuick.com> wrote in message
news:eIXnojFFFHA.1392@tk2msftngp13.phx.gbl...
> > To me, Switch and Bridge are synonymous with
> > Switches simply having more ports (multi-port-bridge).
>
> You have been misinformed. They are distinct device
> type, possibly with some overlapping features.
We'll have to agree to disagree. I have not been misinformed. I am basing it
right from Cisco's material used to train CCNA's. MS's materials for the
"Networking Essentials" exam (or whatever they call it now agrees with
Cisco). The early ones only had two ports and were called bridges, later as
they evolved they were given more ports and were then called "multi-port
bridges",..then later someone got the bright idea of calling them "Switches"
due to the Layer2 Packet Switching ability which was the heart of what
Bridges do. That is the name that "stuck" and is what they are known by
today. The term "bridging" somewhat faded away over time and was relegated
mostly to routing devices on WAN links that ran in "bridging mode" because
both ends of the WAN link were the same subnet. But the term has been
resurrected again with the latest MS OS's with the Nic Bridging that simply
makes the computer function as a Layer2 switching device (aka
bridge/switch). If it only has two Nics it would be a parallel to the old
two-port bridges, if it has more Nics, with all bridged together, then it
begins operate the same as a Switch,...which is kind of pointless to me
since you can go out and buy a cheap switch for $50 that does the same
thing.
> Switches are not even always based on bridges, but may
> be switch-routers (layer 3) or some hybrid of a bridge
> and router switch.
The Layer3 Switch is a hybrid "Johnny-come-lately". They do not "define"
what Switches do, they are unique to themselves and do both the job of a
Router and a Switch. We paid about $10,000.00 for ours due to additional
add-ons and modules.
> If you wish to fully understand you need to start with
> CLASSICAL (simple) bridges and routers, learn their
> KEY points and then apply this knowledge to understanding
> modern hybrid/complex switches.
I didn't just start yesterday. I've "been there, done that". I'm trying to
explain those things, not learn them as if I didn't know what they were.
> > You can have two physcial segments connected with a Switch (aka Bridge)
If a Switch or Bridge separates thm, then it isn't two segments but just
one. Without the router there is no separation.
> > after all, it is the router that creates the broadcast domain,
>
> No. Routers generally DO not join broadcast domains like
> bridges do.
Umm,...that is what I've been saying.
-- Phillip Windell [MCP, MVP, CCNA] www.wandtv.com
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