What's Difference Between Broadcast doamin & Collision Domain.?

Define This into HUB,Switch & Router.?

Collision domain is a logical area where the packets/frames get collied each other in a CSMA/CD ether network. All the hosts in that area trying to grab the access of the network/carrier to send out its data.
In the case of Hub all the ports/host are in the same collision domain, means that only on host can able to send the data. But in the case of switch each port in the switch has seperate collision domain as it has the intelligence upto
MAC layer.

Broadcast domain is logical area, where the brocast packets are heard by the hosts.
In the case of Hub and all the ports/host are in the same broadcast domain.

VLAN configs in the siwtchs can able to divide the broadcast domain in the ethernet segment.

When a broad cast packet is generated in a network it is forwarded to all the prots of a switch or hub because broad cast packets have no IP addres. Therefore switch or hub run under one broadcast domain.
When two hosts access the network at the same time (Suppose the entire network is free and PC1 and PC5 are accessing the ntwork at the same time) a collision occurs. In case of hub it run under one collision domain because it is a physical star topolgy device but working as bus but in case of switch, it tries prot to prot link there fore each port of a switch is a collision domain i.e. no of ports = no. of collision domain.
Routers don't support broadcast and broadcast packets are dropped by router.

Thnaks for your posted

what dos mean CSMA? please

thankz for ur post