Bandwidth sharing between TCP and UDP?

Question

Node # 0 is a TCP source, and the corresponding sink is at node # 6. Node # 1 is a UDP source (CBR traffic) with a null agent attached to node # 7. These two traffic flows through the common link 2-3. The aim of this exercise is to examine how TCP and UDP share the bandwidth between themselves when the rate of CBR traffic is changed. Set the TCP packet size to 1460 B. The UDP and CBR packet sizes are 1500 B. All the links in the network have same bandwidths (say, 4 Mb), delay and queue types.

Part 1:
• Set the initial rate of CBR traffic to 0.5 Mb. Run the simulation, and plot the "Bytes Received" by node #s 4 and 5 (sinks for TCP and UDP traffic)
• Now, increment the rate up to 4 Mb, the link bandwidth, in steps of 0.5 Mb. Run the simulation and plot the graphs again. How does the graphs change after each run? In particular, what's the nature of the graphs when the rate of CBR traffic is 50% of the bandwidth?

Part 2: Behaviour of UDP
• Reduce the bandwidth of the link 2-3 to say, 2 Mb. Repeat the above steps and observe the
graphs in this case.From the graphs plotted observe how UDP occupies a larger portion of the bandwidth. How does the behaviour change for other variations of TCP (Newreno, Vegas)?

Answer 1

GYs, I am a ccie . So, I never came up with the simulations...if anyone knows the answer, plz reply

Answer 2

This is very interesting. I've been in the IT business since 1993. Never had to do anything like this.

Answer 3

I am afraid you need to change to a different course. If you are having to ask all these simple homework questions on here because you are incapable of answering them yourself you will never earn a living in ANY computer related job. You may get a job if you cheat the qualifications, but they will fire you as soon as they see you have no idea what you are doing. and you will never get a reference. So nobody else will ever hire you.