ā07-29-2022 04:36 PM
Hi everyone
Just a quick question please.
Given the attached screenshot, I believe there is 4 broadcast domains and 11 collision domains. It looks like 11 collision domains is not the correct answer. Do we counts the ports on the devices to determine the number of collision domains?
Can someone help with this please?
Many thanks in advance
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ā07-29-2022 07:42 PM
No there is 10 only.
ā07-29-2022 08:22 PM
its 10 collision domains
ā07-29-2022 04:38 PM
ā07-29-2022 08:22 PM
its 10 collision domains
ā07-29-2022 08:29 PM
Hi
Thanks so much
Just to clarify so that I can learn - is it 10 because you count the hub with the 2 pc's connected to it as just 1?
Many thanks
ā07-29-2022 05:45 PM - edited ā07-29-2022 05:46 PM
all user and router connect to Hub count as ONE collision domain.
https://study-ccna.com/collision-broadcast-domain/
ā07-29-2022 07:23 PM
Hi Thanks for your reply
So based on the screenshot I posted isn't there 11 collision domains? I am bit confused
Thanks
ā07-29-2022 07:42 PM
No there is 10 only.
ā07-29-2022 08:39 PM
Thanks for letting me know cheers
ā07-29-2022 08:42 PM
Friend hub connect to 100 host/routers represent one collision domain, in such if one host/router need to send traffic all other need to wait otherwise collision happened.
ā07-29-2022 08:52 PM
I see. Thanks so much for letting me know
Cheers
ā07-30-2022 10:27 AM
There can be a many as 11 collision domains, or as few as just one. 11, 1?
Collisions cannot happen on ports running full duplex, which might be the case for all the ports except those connected to the hub. I.e. that would (usually - see next paragraph) be the "just one" collision domain.
If the hub in question is dual speed, i.e. 10/100, it could then have two collision domains; which would also increase the possible maximum number of collision domains to 11. (NB: I've worked with dual speed hubs, basically they bridge traffic between 10 and 100.)
Regarding number of broadcast domains, that would depend on whether switches are using VLANs (dashed line between sw-1 and sw-2, trunk?); also whether routers are bridging (that's very unusual - but another dashed line between routers, trunk?), not routing.
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