Dec-10 1.Problem : find minimum bandwidth 2.Problem : Sampling rate 3.Write a descriptive note on the three causes of transmission impairments.
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1 Chapter 1 1.What is data communication? What are the four important fundamental characterisitcs? 2.What is a protocol? Briefly explain its key elements. 3.Explain the responsibilities of transport layer in OSI reference model. 1.What is data communication?explain the fundamental characteristics on which effectiveness of data communication depends. 2.Differentiate between LAN,WAN,MAN. 3.Explain the OSI reference model for computer networks. 1.Explain the fundamental characteristics of a data communication system. 2.What is a physical topology? Describe the four basic topologies. 3.Problem on mesh topology. 1.What is data communication?list and explain the five components of data communication systems with examples. 2.Discuss the ISO -OSI layered model,bringing out the functionalities of each layer. 3.Define the key elements of a protocol. 1.What is data communication?what are its characteristics and components? Explain. 2.Give the comparison between LAN,MAN and WAN with an example. 3.Describe with a neat diagram,the functionalities of each layer in the TCP/IP model.
2 Chapter 2 1.Define bandwidth. Problem[lowest frequency? Draw the spectrum] 2.Problem: Shanon channel capacity. 3.Define line coding.describe unipolar nr2,polar nr2-l,bipolar AMI and manchester encoding by applying on the information sequence What are the factors on which data rate depends in data communications? 2.Explain the different causes for transmission impairments during signal transmission through media. 3.Explain with a neat diagram,the components of a PCM encoder. 1.Problem : Find propagation time and transmission time for a message. 2.Represent the bit sequence " " using bipolar schemes AMI and pseudoternary.explain their characteristcs with regard to synchronization and DC component. 3.Explain a PCM encoder. 1.Problem : find minimum bandwidth 2.Problem : Sampling rate 3.Write a descriptive note on the three causes of transmission impairments. 1.Explain the transmission modes. 2.Problem:bit rate 3.Discus 8B/10B coding scheme 4.Explain the delta modulation.
3 chapter 3 1.Problem : Number of data elements and signall elements? 2.Explain phase modulation with neat diagram. 3.What is time division multiplexing? Explain how statistical TDM overcomes the disadvantages of synchronous TDM. 1.With the help of a neat diagram,explain the ASK,FSK and PSK.Discuss the bandwidth requirement in each case. 2.What is spread spectrum?explain the following techniques for spead spectrum: FHSS and DSSS. 1.Describe the different transmission modes. 2.Find signal and data elements. 3.List the multiplexing techniques.explain the concept of multiplexing using frequency. 1.What is time division multiplexing?explain how statistical TDM overcomes disadvantages of synchronous TDM. 2.Problem: Calculate data and signal elements. 3.Explain phase shift keying in detail. 1.Problem:Calculate data and signal elements. 2.Define synchronous TDM. 3.Explain the amplitude modulation.
4 Chapter 5 1.Explain selection repeat ARQ with neat diagrams. 2.What is piggybacking? List its usefulness. 3.Explain the frame format and transitional phases of point-to-point protocol. 1.Explain with the help of examples the concepts of bit stuffing and byte stuffing. 2.Explain step and wait ARQ protocol with the help of a neat diagram. 3.Explain the frame formats and control fields for different types of HDLC frames. 1.Describe a stop-wait protocol with ARQ. 2.Why is bit stuffing and byte stuffing needed? Explain them with examples. 1.List the protocols for noisy channels.explain stop and wait protocol for noiseless channels. 2.Define piggybacking and its usefulness. 3.Write explanatory notes on the different phases of PPP. 1.Explain the selective repeat and stop and wait ARQ. 2.Discuss HDLC protocol.
5 Chapter 6 1.Problem : Find throughput.[200 bit frame][pure ALOHA] 2.With a neat diagram explain CSMA/CD protocol. 3.Explain the MAC sublayer of gigabit ethernet. 1.Problem : 200-bit frame 2.What is CSMA? Explain the different persistance methods of CSMA. 3.Explain the mac frame format. 1.Describe the frame format of PPP. 2.problem : 200 bit frame 3.Describe CSMA/CA protocol with a neat flow diagram. 1.Describe the different controlled access methods. 2.Explain MAC frame format and frame length. 1.Explain: 1.CSMA 2.CSMA/CD 2.What do you mean by channelization? Explain the protocols used for channelization.
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