Topic

Congestion Control

5 questions in this topic.

2013 Q2(c)Transport LayerCongestion Control· 4 marks

Why does TCP change congestion control behaviour at a threshold value? Specifically what is the significance of the threshold value that makes it the logical point to change from exponential growth to linear growth?

TCPssthreshAIMD

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2014 Q2(b)(i)Transport LayerCongestion Control· 3 marks

Controlling congestion in a network can be critical to performance. If a network does not have any congestion control, explain what conditions will cause congestion to occur. Be specific. "too much traffic" is not enough detail. You need to explain your answer in terms of router and link resources.

congestionqueuespacket loss

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2014 Q2(b)(ii)Transport LayerCongestion Control· 6 marks

Controlling congestion in a network can be critical to performance. Explain in detail how TCP provides congestion control.

TCPAIMDslow start

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2015 Q2(b)Transport LayerCongestion Control· 6 marks

Explain in detail how TCP provides congestion control.

TCPAIMDslow start

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2015 Q2(c)Transport LayerCongestion Control· 2 marks

Explain why it is reasonable to assume that receiving 3 duplicate ACKs in TCP is an indication that the network is not currently congested.

TCPfast retransmit

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