Why congestion occurs, Computer Networking

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Q. Why congestion occurs?

Congestion

Emerge if the load on the network is greater than the capacity of the network

- Load that is the number of packets sent to the network

- Capacity that is the number of packets a network can handle

Why congestion occurs?

- Because routers and switches have queues that hold the packets before and after processing

Congestion control: keep the load below capacity

2302_Why congestion occurs.png

The packet is place at the end of the input queue

The processing module moves the packet from the queue and forwards the packet

The packet is put in an appropriate output queue


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