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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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migrated from stackoverflow.com Jul 14 '10 at 12:26

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1 Answer 1

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

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