broadcast domain!?

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

I am reading these 2 questions and I do not understand the answers??
1) If a switch has 4 ports, how many broadcast domains does it have?
answer: 1
2) If a router has 4 ports, how many broadcast domains does it have?
answer: 4

My questions:
What does broadcast domain mean here?? is it physical port?? what is
the relation between the number of ports and the broadcast domain.

I do not understand why a switch with 4 ports has 1 broadcast domain??
and why the router with the same number of ports has 4 broadcast
doamins??

Thanks a lot..

 

[Guest]

Archived from groups: alt.comp.hardware.pc-homebuilt (More info?)

"esara" <esara123@hotmail.com> wrote in message
news:fd7d27e7.0405260702.2b0f375c@posting.google.com...
> I am reading these 2 questions and I do not understand the answers??
> 1) If a switch has 4 ports, how many broadcast domains does it have?
> answer: 1
> 2) If a router has 4 ports, how many broadcast domains does it have?
> answer: 4
>
> My questions:
> What does broadcast domain mean here?? is it physical port?? what is
> the relation between the number of ports and the broadcast domain.
>
> I do not understand why a switch with 4 ports has 1 broadcast domain??
> and why the router with the same number of ports has 4 broadcast
> doamins??
>
> Thanks a lot..

http://www.google.co.uk/search?q=define%3A+broadcast+domain&ie=UTF-8&hl=en&meta=

hamman