The network that you will simulate will consist of 6 nodes, in the topology depicted in the following figure.

All the links will have 1.5 Mbps of bandwidth and 20 ms of delay. Each node will use a DropTail queue, of which the maximum size is 10. The simulation should run for 5 seconds.

• At second 0.5 a "tcp" agent will start transfering data from n0(TCP agent) to n4(TCP Sink).
• Later at second 1.5 another tcp connection will start between n1(TCP agent) and n5(TCP Sink).
• Finally, a "udp" connection will start between n1(UDP agent) and n5(NULL) at second 2.5.
• All traffic will end at the end of the simulation (i.e. at second 5).
• For traffic generators you will use FTP traffic generators for the TCP connections and for the UDP connection you will use CBR traffic that is configured to generate 1 KByte packets at the rate of 1 Mbps.

Note that you should run the simulation with trace logging enabled.

Deliverables:

• Plot the throughput-time graphs of each connection (2 tcp, 1 udp) for the n2 - n3 link
• Observe the plots and describe the behavior of the tcp - udp connections through time