But what if you bung a bridge in the 10.10.10.0/24 network somewhere? That
will split your collision domain but not your broadcast domain.
Or, more likely, what if instead of a hub, the hosts in 10.10.10.0/24 are
connected by a switch (aka multi-port bridge ;-)? Then every host is in
its own collision domain (well, each collision domain includes the host
and the switch port), but they are still all in one broadcast domain.
Just because the collision domain and the broadcast domain are the same in
one specific case does not mean that they are the same thing in the
general case.
JMcL
----- Forwarded by Jenny Mcleod/NSO/CSDA on 28/03/2002 02:02 pm -----
"John Green"
Sent by: [EMAIL PROTECTED]
28/03/2002 12:25 pm
Please respond to "John Green"
To: [EMAIL PROTECTED]
cc:
Subject: Re: What is bandwidth domain? [7:38887]
but please consider this diagram:
-------------------ROUTER--------------------
| | | | | | | |
A B C D E F G H
A,B,C,D are hosts in say network 10.10.10.0 /24
E,F,G,H are hosts in say network 10.10.9.0 /24
say Host A sends a broadcast, then it will be heard by
the network on left side and not on right side as
ROUTER will not allow any broadcast through.
and the hosts in network on left are connected to a
HUB and network on right to another separate HUB.
Now the collision domain and broadcast domain for the
network on left side is same. is it not ?
--- Priscilla Oppenheimer wrote:
> At 01:02 PM 3/27/02, John Green wrote:
> >so Broadcast domains and Bandwidth domains are the
> >same ?
>
> Of course not. We said that bandwidth and collision
> domains are the same on Ethernet.
>
> > (i guess so)
> >
> >For Ethernet broadcast and collision domains are
> the
> >same. right ?
>
> Of course not. You may be confused because some
> people use "broadcast" when
> talking about sending Ethernet at the physical
> layer. A coaxial cable is
> sometimes called a broadcast medium because the bits
> radiate out from the
> sender and reach all senders on the cable. It's an
> unfortunate use of the
> term that has been carried into generic discussions
> of Ethernet, despite
> the demise of coaxial-cable based Ethernet.
>
> Broadcast means a frame addressed to
> FF:FF:FF:FF:FF:FF. Switches forward
> these frames to all ports. They forward unicasts
> only to the correct port
> once they learn the location of destinations. A hub,
> on the other hand,
> forwards all bits without regards for the
> destination address.
>
> This is networking 101. Do you know about the CCNA
> study list? You should
> join that list.
>
> Priscilla
>
>
> >--- Priscilla Oppenheimer wrote:
> > > A bandwidth domain is an area of a network where
> all
> > > devices can hear each
> > > other's transmissions. A collision domain is a
> type
> > > of bandwidth domain,
> > > but it's specific to Ethernet.
> > >
> > > I think people started using the term "collision
> > > domain" first and then
> > > someone said, "yes, but that doesn't apply to
> token
> > > ring which doesn't have
> > > collisions!" so some marketing engineer came up
> with
> > > the term "bandwidth
> > > domain." ;-)
> > >
> > > Priscilla
> > >
> >
> >
> >__________________________________________________
> >Do You Yahoo!?
> >Yahoo! Movies - coverage of the 74th Academy
> Awards.
> >http://movies.yahoo.com/
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
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