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University of Barishal

Department of Computer Science and Engineering

Final Exam

Course Title: Data Communication (CSE-2205)

Semester: 4th | Session: 19-20

Time: 180 minutes | Marks: 60.00

View 206 Topic-wise Questions for this Course

Answer any Five (5) of them.

1.

a)

Briefly describe the types of IPv6 and the transition method from IPv4 to IPv6

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5 Marks
b) Define data communication. Briefly describe the components of a data communication system.

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3 Marks
c)

Why do we need to use IPv6 addressing rather than IPv4? Explain Auto configuration and Renumbering features of IPv6.

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4 Marks
2.

a)

 Write down the basic functionality of Router, Switch and Hub.

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3 Marks
b)

What are main causes of transmission impairment? Explain with proper diagram

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3 Marks
c)

Give your logical reasoning about Flow control and Error Control in Data Link layer and Transport layer.

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3 Marks
d)

What is the ICANN range? Mention the port number of these protocols FTP, TCP, UDP, SMTP, DNS, TELNET, DHCP, HTTP

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3 Marks
3.

a)

Draw the graph of the MLT-3 scheme using each of the following data streams,
i. 00000000   ii. 11111111   iii. 01010101

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3 Marks
b)

Define DC Component and Baseline Wandering along with their effects on digital transmission.

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3 Marks
c)

Write down basic properties of the following line coding schemes with proper signal schem?
i. Unipolar   ii. Polar   iii. Bipolar

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6 Marks
4.

a)

What are the two components of a signal when the signal is represented on a constellation diagram? Which component is shown on the horizontal axis? Which is shown on the vertical axis?

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3 Marks
b)

Briefly explain analog to analog conversion technique Quadrature Amplitude Modulation (QAM) including advantages, disadvantages and real application scenarios

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3 Marks
c)

Write notes of on the following terms

i) Amplitude Shift Keying

ii) Phase Shift Keying

iii) Frequency Shift Keying

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6 Marks
5.

a)

Discuss the sliding window flow control protocol in brief.

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3 Marks
b)

Describe Frequency division multiplexing (FDM)'s working procedure along with FDM's advantages, disadvantages and application scenario.

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3 Marks
c)

Define spread spectrum and its goal. List the two spread spectrum techniques.

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2 Marks
d)

Briefly describe TDM and WDM in real application scenarios.

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4 Marks
6.

a)

How does a single-bit error differ from a burst error?

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2 Marks
b)

Discuss the concept of redundancy in error detection and correction?

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2 Marks
c)

Define Hamming distance and Minimum Hamming distance. Find out these distance for each of the following code words:

i. d (10110, 10011)  ii. d (10101, 11100)  iii. d (11011,11011)  iv. d (0101, 1001)

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4 Marks
d)

Write short notes on i) Cyclic Redundancy Check (CRC) ii) CHECKSUM

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4 Marks
7.

a)

What is the TCP congestion? How to avoid TCP Congestion using proper example?

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3 Marks
b)

Briefly describe the three phase of Three-way handshaking of TCP through suitable figure.

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5 Marks
c)

Make a comparison of TCP and UDP header format.

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4 Marks
8.

a)

What is the position of Transmission media in the OSI model and Internet model.

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2 Marks
b)

Explain and draw FSM of Stop and Wait protocol as well as Go- Back N protocol and Selective Repeat ARQ for noisy channel. Also find out the basic differences between them.

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6 Marks
c)

What are the three major classes of wireless media? Write down the prominent characteristics of them and their application scenarios.

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4 Marks
View 206 Topic-wise Questions for this Course

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Uploaded By: Onebyzero Edu (Test User) Aug. 17, 2024, 12:55 p.m.
Converted By (Img/PDF to Text): Baishakhi Bir Nov. 28, 2025, 5:18 p.m.
Reviewed By: Obaydul Hasan Nayeem Nov. 28, 2025, 11:26 p.m.
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