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KL University, Guntur

Academic Year: 2012 13, VI Semester

Branch: ECE Course Code & Title: 11EC310 Computer Networks

Name of the Instructor: Mr. K. Rajendra Prasad

Section-3C Question Bank

(Question bank is provided as reference material which willhelpful for the preparation only)

Part-1&2(Introduction to CN and Physical Layer)

1.Compare the various network topologies.2. Discuss LAN, MAN, WAN.

3. Describe the five service primitives for implementing a simple connectionoriented service with a simple client-server interaction.

4. What is OSI reference model, why was it developed? Where is it used?Mention the different functionalities of each layer of OSI reference model

5. What is TCP/IP reference model? Why was it developed? Where is it used?Mention the different functionalities of each layer of OSI reference model

6. What are the similarities and dissimilarities of OSI and TCP/IP referencemodel? Critique the TCP/IP reference model.

7. Explain about the ATM network with its layer architecture.

8. What are the functionalities of the physical layer? Briefly describe aboutthree popular guided media.

9. Compare the advantages and disadvantages twisted pair, coaxial cableand fibre optics transmission media.

10. Discuss about necessity of multiplexing on various issues.

11. Explain statistical time division multiplexing with diagrams and outline

the advantages and disadvantages.

12. Discuss the need of Switching? Compare circuit switching and packetswitching in any six aspects?

13. Compare virtual circuit and datagram subnets?

Part-3(Data Link Layer)

1. Describe Why framing, byte stuffing and bit stuffing necessary for dataCommunication.

2. Describe Stop and Wait ARQ, Go-Back-N ARQ, Selective Repeat ARQprotocols.

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3. Explain Sliding Window Protocols used in DLL.

4. Describe the Frame Format of HDLC protocol.

5. Describe the importance of hamming distance?

6. For the polynomial code method G(x) = x4+x+1, Frame 1010111011.Determine the transmitted frame Given a 10-bit sequence 1010011110 and

a divisor of 1011, Find the CRC. Check your answer.

7. Explain how the piggybacking increases the efficiency of the transmissionrate in stop and wait protocol with required diagrams.

8. Explain VRC, LRC methods for error detection.

Part-4(Medium Access Layer)

1. Describe the Random Access methods used in MAC sub-layer

2. Describe slotted ALOHA is more efficient than pure ALOHA protocol.

3. Describe the collision detection protocol used in multiple access methods.

4. Explain in detail about CSMA/CA and CSMA/CD with necessarydiagrams and flowcharts.

5. Explain different persistent methods used in various medium accessprotocols

6. Describe in detail about standard ETHERNET

7. Discuss the sub-netting and Use of IP address

8. Write the difference between bridges & routers.

Part-5(Network Layer: Routing & Congestion)

1. What is the purpose of routing algorithms? How is routing implemented

for connection oriented and connection less services?

2. Explain about the routing technique of flooding, types of flooding,disadvantages of flooding?

3. What are the steps involved in the Distance Vector routing algorithm and

mention about two disadvantages of this algorithm.

4. What are the five steps involved in Link State Routing and explain about

each of them?

5. What are the fields of Link state packet and why are they needed? Whatare the fields contained in the packet buffer for a router using Link State

Vector routing algorithm?

6. Discuss ARP and RARP

7. Determine the limitations of distance vector routing algorithms.

8. Describe traffic shaping. Explain two methods of traffic shaping.

9. Explain the methods to improve QOS?

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10. Explain choke packets methods of congestion control.

11. With an example describe Shortest Path Routing

12. Discuss Hierarchical Routing

13. Explain the following i) IP protocol ii) IP address iii) subnet iv) ARP,RARP

Part-6(Transport Layer)

1. Describe the use of sequence numbers in the Transport layer.

2. Explain the services provided by TCP.

3. Differences between UDP and TCP.

4. Describe connection establishment and connection release in TCP and

UDP.

(Header Formats and Description is must for TCP, UDP and RTP)

Part-7(Introduction to CN and Physical Layer)

1. Explain the various services provided by the application layer.

2. Describe (a) Domain Name Space (b) E-mail

3. Describe World Wide Web architectural overview