What is collision domain and broadcast domain? what is the difference between collision domain and broadcast domain?

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sixthzenz

  • Apr 9th, 2008
 

A collision domain measures the numbers of nodes impacted when a network collision occurs. When you segment a LAN (using a bridge or switch for example), you're in effect establishing a collision domain as the switch filters frames and decides whether or not to keep them inside the switch's "domain" or pass them through - depending on the MAC address. The broadcast domain consists of the number of nodes that can receive a "broadcast" message. So if there are no intermediate network devices (i.e., switches or bridges) and several nodes are connected together using simple Ethernet cabling, then the broadcast and collision domains are identical. Add a switch to the mix and add several nodes to it (now you're segmenting the network) and now your collision domain becomes smaller, but your broadcast domain remains the same.

Collision domain measures the numbers of nodes impacted when a network collision occurs. When you segment a LAN (using a bridge or switch for example) you're in effect establishing a collision domain as the switch filters frames and decides whether or not to keep them inside the switch's "domain" or pass them through - depending on the MAC address. The broadcast domain consists of the number of nodes that can receive a "broadcast" message. So if there are no intermediate network devices (i.e. switches or bridges) and several nodes are connected together using simple Ethernet cabling then the broadcast and collision domains are identical. Add a switch to the mix and add several nodes to it.

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