Question: (b) TCP uses two windows to control the rate at which it can send data into a network. Explain what these two windows are and

(b) TCP uses two windows to control the rate at which

(b) TCP uses two windows to control the rate at which it can send data into a network. Explain what these two windows are and how they are updated assuming no losses in the network. Give two examples of how a TCP sender would detect the occurence of congestion in a network. [10 marks] (c) A graph G is composed of a set of vertices, V, and a set of edges, E. The number of vertices and edges is denoted V and E respectively. The graph G is said to be clean if the nodes do not know the topology of the graph. A Link State routing requires knowledge about the link states of the network. State the messaging complexity required to gather this information. Justify this expression. [5 marks] (d) Describe the advantages of performing modular exponentiation iteratively in RSA. Compute the value of c=bemodm using an iterative modular exponentiation procedure for b=4,e=4 and m=497. Show each step of this iteration. [10 marks]

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