Jon Marshall Tue, 07/20/2010 - 02:05

gaurang.malgaonkar wrote:


     can any one tell me difference between flooding and broa    

dcast?


Broadcast is used when the destination address is a broadast address.


Flooding is generally used to refer to when a packet is sent out of all ports on a switch because the switch does not have an entry in the mac-address table for that destination mac-address. So unlike broadcast the packet may have a unicast destination address but it is still sent out of all ports.


You may find that some books etc. use the terms interchangeably so it can get a bit confusing.


Jon

Mohamed Sobair Tue, 07/20/2010 - 02:17

Adding to jon's reply:


a layer-2 broadcast means a frame with destination mac of  FFFF.FFFF.FFFF, when a switch recieves such frames, if forward it out all ports except the source the frames was recieved on.



HTH

Mohamed

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