In a network, flooding is the forwarding by a router of a packet from any node to every other node attached to the router except the node from which the packet arrived. Flooding is a way to distribute routing information updates quickly to every node in a large network. It is also sometimes used in multicast packets (from one source node to many specific nodes in a real or virtual network).
The Internet's Open Shortest Path First (OSPF) protocol, which updates router information in a network, uses flooding.
In computer networking, broadcasting refers to transmitting a packet that will be received (conceptually) by every device on the network. In practice, the scope of the broadcast is limited to a broadcast domain.
Re: Difference b/w flooding and Broadcasting
10 years 6 months ago #25563
As you can see, there are multiple definitions depending on context. I typically relate flooding to a switched network, where a frame is flooded out all ports if a switch does not have knowledge of the destination MAC.