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Download VTU BE 2020 Jan CSE Question Paper 17 Scheme 4th Sem 17CS46 Data Communications

Download Visvesvaraya Technological University (VTU) BE ( Bachelor of Engineering) CSE 2017 Scheme 2020 January Previous Question Paper 4th Sem 17CS46 Data Communications

This post was last modified on 02 March 2020

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Module-1
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Fourth Semester B.E. Degree Examination, De an.2020

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E. E. 1 a. Describe data communication and its components. (05 Marks)

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P b. Analyze the principle behind protocol layering. Enumerate the functions of different layers
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b. Define line coding. Enumerates the challenges in line coding. Draw the line code of the
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c. In a digital transmission, the receiver clock is 0.3 percent faster than the sender clock. How

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many extra bits per second does the receiver receive if the data rate is 1Mbps. (05 Marks)

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Module-2
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with example.
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b. Briefly explain with neat diagrams. Amplitude shift keying and frequency shift keying
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modulation techniques. Specify bandwidth requirements. (05 Marks)
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C. An analog signal has a bit rate of 8000 bps, and a baud rate of 1000 baud. How many data
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element are carried by each signal elements'? How many signal elements do we need?
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three stages of circuit switching. (10 Marks)
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c. Analyze how message can be transmitted from one system to another using datagram

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network and calculate the total delay in the network.
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b. Explain the encoder and decoder logic of Cyclic Redundancy Check (CRC) coding with neat
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diagram. (10 Marks)
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(05 Marks)

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o
OR
6 a. Explain the working of stop-and-wait protocol for Noiseless channels. (05 Marks)
b. Explain selective repeat ARQ protocol for noisy channels. (05 Marks)
c. Explain the frame format of HDLC protocol. (05 Marks)

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d. Describe the transition phases of PPP protocol with Finite State Machines. (05 Marks)
1 of 2
Module-1
17CS46
Module-4

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7 a. Analyze the need for access control protocols . Explain the working of CSMA/CD with
suitable diagrams. (10 Marks)
b. Describe pure ALOHA and slotted ALOHA protocols. (05 Marks)
c. Discuss 802.3 MAC frame format. (05 Marks)
OR

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8 a. Analyze Gigabit Ethernet. (05 Marks)
b. Brief on Bluetooth and explain the architecture of Bluetooth. (05 Marks)
c. Analyze channelization. Explain Code Division Multiple Access (COMA) with an example.
(10 Marks)
Module-5

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9 a. Explain the operation of cellular telephony. (05 Marks)
b. Explain the working of mobile IP. (05 Marks)
c. Analyze satellite networks and its different categories. (10 Marks)
OR
10 a. Explain IP datagram header format with neat diagram and given the description of each

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field. (10 Marks)
b. Explain the transition from IPV4 to IPV6. (05 Marks)
c. Write a short note on fixed WiMax. (05 Marks)
2 of 2
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