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In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Network congestion in data networking and queueing theory is the reduced quality of service that occurs when a network node or link is carrying more data than it can handle. Typical effects include queueing delay, packet loss or the blocking of new connections. A consequence of congestion is that an incremental increase in offered load leads either only to a small increase or even a decrease in network throughput.
Output:
what do you mean by congestion and overflow