Flooding (computer networking)

Flooding (computer networking)

Flooding is a simple routing algorithm in which every incoming packet is sent through every outgoing link.

Advantages

* If a packet can be delivered, it will (probably multiple times).
* Since flooding naturally utilizes every path through the network, it will also use the shortest path.
* This algorithm is very simple to implement.

Problems

* Flooding can be costly in terms of wasted bandwidth and, as in the case of a Ping flood or a Denial of service attack, it can be harmful to the reliability of a computer network.
* Duplicate packets may circulate forever, unless certain precautions are taken:
** Use a hop count or a time to live count and include it with each packet. This value should take into account the number of nodes that a packet may have to pass through on the way to its destination.
** Have each node keep track of every packet seen and only forward each packet once.


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