first of all, thanks for the research. it makes sense now that I've read
through it.
it appears that things have changed a lot since the days of ISAM/VSAM and
hashed lookups. I recall reading a bit about CEF, and coming to a similar
conclusion - that the Computer Science people have done
Michael L. Williams wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
snip a bit
builds a routing table etc... I put the book down, pointed at it, and
told my friend Don't by this book! I am appalled at what passes for
techincal books (I guess I'm more sensitive about
Ok. I found the source of the information. I would like to here your
feedback on this.
Course Technology * Thompson Learning, i-Net+ Guide to Internet
Technologies, Jean Andrews, p. 443-445
What is the difference between a bridge and a switch? The main difference
is how they work. A bridge
I used to wonder why I had such a hard time grasping technology concepts
until I reached a level where I actually understood some of this stuff. Then
I found that a lot of sources either did not understand the concepts
themselves or worse yet, they were so imprecise with their language and
Both bridges and switches learn the port to use to reach a MAC destination.
If they haven't learned it yet, they flood the frame out all ports except
the originating port.
Jean Andrews has written some superb books on PC technology. I have a book
by her called A+ Guide to Managing and
First let me say that I was looking for a book to recommend to a friend, and
I picked up this same book in the store and thumbed through I actually
happen to stop on the part where it talked about how a switch (bridge)
builds a routing table etc... I put the book down, pointed at it, and
Priscilla Oppenheimer wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
Regarding the difference between a MAC table and CAM table: They are just
different names for the same thing.
One small quibble (heheh. don't you expect this from me by now =)
Although they do essentially
:[EMAIL PROTECTED]] On Behalf Of
Kevin Jones
Sent: Wednesday, May 22, 2002 1:59 PM
To: [EMAIL PROTECTED]
Subject: Re: Bridge and switch [7:44649]
I was under the impression that, while a switch is often termed a
multiport
bridge, there is one fundamental difference in the way the two devices
I was under the impression that, while a switch is often termed a multiport
bridge, there is one fundamental difference in the way the two devices
forward frames. While my source is not always the most credible or reliable
(Course Technology Networks Plus book), it does cause me to stop and
There are a few things wrong with that description.
First, switches and/or bridges are layer two devices and wouldn't be
aware of different IP subnets in the first place. A switch or bridge
will forward a frame out all ports except the originating port if it has
not yet learned the correct port
At 02:58 PM 5/22/02, Kevin Jones wrote:
If a multiport bridge determines (based on the destination MAC address) that
the destination node is on another subnet,
Stop right there. It can't figure out that the destination is on a
different subnet from the MAC address. Subnets are differentiated by
John Neiberger wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
However,
it's still a rectangle when you get right down to it.
Hey. A square isn't a rectangle!!!
(just kidding I just thought I'd be stubborn... hehe)
Good analogy..
Mike W.
Message Posted at:
I was oblivious to the fact that I was using the word subnet. What I
should have used is the word segment. Anyway, I went back to what I
thought was the source and was unable to find the description I had read.
I'll look again. Not sure where I read it now. Anyway, this thread has
confirmed
At 06:11 PM 5/22/02, Kevin Jones wrote:
I was oblivious to the fact that I was using the word subnet. What I
should have used is the word segment.
Ah. That makes more sense. When a frame arrives, both bridges and switches
send the frame on its way without sending it back onto the originating
Marketing! A switch is simply a multiport bridge. Bridges originally
had very few ports, as few as two. When hardware became faster and
manufacturers started adding more ports to their bridges they started
calling them switches to differentiate them from their slower brethren
with fewer ports.
A switch is a multiport bridge. Think of a bridge that bridges together
2 networks (i.e. has two interfaces, one in each network). Then
supposed you upgrade to a 3 port bridge, that can connect 3 networks.
keep adding ports up to 4, 8, 12, 24, or even 48 and that's a switch.
A bridge spans a body of water so that two pieces of land can be connected
and switch is used to control the flow of
electricityJust kidding!
Try this link (watch for wrap)!:
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/bridging.htm
Shawn K.
Switching is a marketing term. You would be wise to focus on Bridging and
Routing and when the word switch appears, read to fine print to figure out
if the device in question bridges or routes.
At 02:57 PM 5/21/2002 -0400, rtiwari wrote:
Could somebody will please describe me the difference
ideally when during evalution there was a need for a device to interconnect
two
networks and bridges came into existence which let two segments to be
connected, so that alfi in accounts can send messages to rita in marketing.
when the greedy boss extended the company he bought in many computers
Switch = mega interfaced bridge.
Dave
rtiwari wrote:
Could somebody will please describe me the difference in
between bridge and switch.
Thanks
Ravi
--
David Madland
Sr. Network Engineer
CCIE# 2016
Qwest Communications Int. Inc.
[EMAIL PROTECTED]
612-664-3367
Emotion should reflect
introduced into Ethernet switches, but at their base functionality,
it's all pretty much the same.
-Original Message-
From: Michael L. Williams [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, May 21, 2002 3:20 PM
To: [EMAIL PROTECTED]
Subject: Re: Bridge and switch [7:44649]
A switch
This begs the question, what is the difference between a multi-port bridge
and a switch? Or, what is a switch when it routes? I personally think
bridge and router convey with relatively little ambiguity the function of a
device whereas switch is simply a tool that marketing folks use when
is it good to say that
Bridge supports up to 16 ports ans is software based.
but Switch supports any number od ports and is
hardware based.
Peter van Oene wrote:
This begs the question, what is the difference between a multi-port bridge
and a switch? Or, what is a switch when it
ditto, you won't get an argument from me!!!
Peter van Oene wrote:
This begs the question, what is the difference between a multi-port bridge
and a switch? Or, what is a switch when it routes? I personally think
bridge and router convey with relatively little ambiguity the function of a
And it's worth mentioning a couple other things too, just to confuse
matters. ;-)
Although a switch behaves like a multiport bridge, it is often placed in a
topology where a hub used to go. Because a switch has so many ports, people
use them to connect individual stations. Bridges were rarely
At 05:11 PM 5/21/02, rtiwari wrote:
is it good to say that
Bridge supports up to 16 ports ans is software based.
No, I think the discriminator is 15 ports. Just KIDDING! Seriously,
assigning a number is not necessary. Most bridges had just two ports, but
there probably were a few vendors that
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