I always get confuse with this concept. of how many Collision domain.. and broadcast domain for Networking devices and how they work in Collision and broadcast domain . ?
Switch Hub & Router in CD and BD ?
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The Broadcast Domain is equal to or greater than the Collision Domain.
All ports on a hub are in the same collision domain (and therefore, also the same broadcast domain).
All ports on a switch are in the same broadcast domain, but separate collision domains.
Hubs connect disparate broadcast domains together.
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Does anyone actually manufacture hubs any longer? The concept of collision domains comes from early Ethernet days when many devices shared a common media, coax cable. Also, routers connect different broadcast domains. – dbasnett Jul 15 '10 at 11:59