Congestion - too many packets are present in a part of a subnet
Programming Language (MCQ) questions
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
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-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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