[SATLUG] Network+ question collision domains
bruce.dubbs at gmail.com
Sun Jan 10 20:04:19 CST 2010
Todd W. Bucy wrote:
> I have a virtual server running with three nic cards. each nick card is
> bridged. One bridged nic is connected to the the DMZ router/switch,
> another one is connected to my private router, and a third is connected
> to a separate experimental network. the virtual server itself lies
> behind the private router and hosts a 2 webservers and a mail server
> inside of the DMZ and a LTSP sever on my experimental switch. finally
> each bridge nic can accomidate up to 10 hosts.
> given that the nics are bridged do the hosts connected to that bridged
> nic constitute a collision domain?
I don't know about your setup, but if it were HW, a collision domain is
where frames being sent out can collide. Bridges do a Carrier Sense
with Multiple Acesss and Collision Detection CSMA/CD. Hubs do not and
the collision detection has to be at the NIC. That is fairly old
technology with Thick-net or Thin-net. 10*-BaseT is generally hooked up
to a bridge or a router that inherently prevents collisions.
A bridge receives a frame and can hold it until the destination is free.
My conclusion is that what you have is probably free of collisions.
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