5. (10 marks) Consider the network topology shown in the following figure. 2000 km 3000 km A B Frames are generated at n
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5. (10 marks) Consider the network topology shown in the following figure. 2000 km 3000 km A B Frames are generated at n
5. (10 marks) Consider the network topology shown in the following figure. 2000 km 3000 km A B Frames are generated at node A and sent to node C through node B. Determine the minimum data rate required between nodes B and C so that the buffers of node B are not flooded. Assume the following conditions for your calculations: ● The data rate between A and B is 20 kbits/sec. Propagation delay is 5 µsec/km for both links. Links are full-duplex. ● All data frames are 1000 bits long; ACK frames are separate frames of negligible length. Between A and B, a sliding-window protocol with a window size of 4 is used. ● ● Between B and C, a sliding-window protocol with a window size of 2 is used. No transmission errors occur. ●
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