SIMULATION OF NETWORK TOPOLOGY USING NS2 Consider the network where T1-T6 are transmitters and R1-R6 are receivers. R1 receives from T1, R2 receives from T2 and so on. B1,B2 and B3 act as bottleneck nodes and also provide for routing of packets. Consider queuing systems as RED for B1,SFQ for B2 and FIFO for B3.  Queue length of B1and B2 = 1000  Queue length of B3 = 2000  Bandwidth of Ti-Bi links = 200 kbps  Bandwidth of B1-B3 link and B2-B3 link = 500 kbps  Bandwidth of B3-Ri links = 200 kbps Simulate the above topology using NS2 and study the eect of bottleneck bandwidths on interarrival time and throughput using the generated trace le. Write an awk script to nd the desired parameters and plot them using gnuplot for dierent values of bottleneck bandwidths. 3

Code
....\arrival.awk
....\inter.p
....\ns2.tcl
....\out.nam
....\out.tr
....\throughput.p
....\trace.awk

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