Congestion - too many packets are present in a part of a subnet

Q.  When too many packets are present in a part of a subnet the performance degrades, this situation is called as Congestion.
- Published on 19 Oct 15

a. True
b. False



  • Prajakta Pandit   -Posted on 12 Oct 15

    - Congestion occurs when routers are too slow. It affects on queues length.

    - The ultimate level of congestion is known as deadlock.

    - The network layer is responsible for providing congestion control.

    - Congestion is global in scope and involves all hosts, routers and other factors but the congestion control is not same as flow control.

    - It applies a point-to-point traffic between a sender node and a receiver node.

    - Congestion gets worst if a router has no free buffers, it must ignore newly arriving packets.

    - If suddenly all the packets begin arriving on three or four input lines and all need the same output line, a queue will build up and it may occur a congestion.

    - If there is insufficient memory to hold data, packets will be lost.

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