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Unit 11: Transport Layer

2. Why transport layer is required when both the network and transport layers provide Notes
connectionless and connection oriented services?
3. What are the different quality of services parameters at the transport layer?

4. Why UDP is used when it provides unreliable connectionless service to the transport
layer?
5. What is the purpose of flow control?

6. Describe the TCP and its major advantages over UDP.

Answers: Self Assessment

1. Connection establishment delay 2. Connection establishment failure
probability

3. Connection Establishment/Release 4. Fragmentation
5. Integrated Services 6. Quality of Service
7. Resilience 8. connection oriented
9. UDP 10. connection oriented
11. connection oriented 12. Garbage

11.7 Further Readings

Books Achyut S Godbole and Atul Kahate published, Web Technologies, Tata McGraw
Hill.
Andrew S. Tanenbaum, Computer Networks, Prentice Hall.

Behrouz A. Forouzan, Sophia Chung Fegan, Data Communications and Networking,
McGraw-Hill Companies.
Douglas Comer, Computer Networks and Internets with Internet Applications, 4th
Edition, Prentice Hall.
Ferguson P., Huston G., Quality of Service: Delivering QoS on the Internet and in
Corporate Networks, John Wiley & Sons, Inc., 1998.
J. D. Spragins, Telecommunications Protocols and Design, Addison-Wesley.
McDysan, David E. and Darren L. Spohn. ATM Theory and Applications, McGraw-
Hill Osborne Media, 1998.
Nassar, Daniel J., Ethernet and Token Ring Optimization. iUniverse.com, 2000.
Spurgeon, Charles E. Ethernet, The Definitive Guide. O’Reilly & Associates, 2000.
William A Shay, Understanding Communication and Networks, 3rd Edition, Thomson
Press.

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