flooding Vs broadcast?

Unanswered Question
Jul 20th, 2010

     can any one tell me difference between flooding and broa    

dcast?

I have this problem too.
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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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