Question: can you please help me with (b) and (d) :) (a) in the context of network modelling, briefly describe what is meant by the: (0)

can you please help me with (b) and (d) :)

(a) in the context of network modelling, briefly describe what is meant by the: (0) (1) (III) (lv) (V) arrival rate, A; service rate, mean throughput, S; mean system delay, W, mean waiting time, Q. [5 marks) (b) A network consisting of two nodes connected by one link is modelled as an MM1/" queue with arrival rate of 2000 messages s' and service rate 4000 messages s. Briefly describe the basic elements of this queue and sketch its state transition diagram. (c) For the network and queueing model of part (b) determine the: [4 marks] O (ii) (ii) (iv) probability that the network is empty: mean throughput of the network; mean system delay mean waiting time. [4 marks] (d) Discuss the advantages and disadvantages of the following two options for upgrading the network of part (b) above. 0 C) Adding another identical link with service rate 4000 messages s Replacing the link with another having a service rate of 8000 messages s' (i.e. twice the rate). [7 marks]

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