Download PTU B.Tech 2021 Jan EE 7th Sem 71940 Network And Data Communication Question Paper

Download PTU (Punjab Technical University) B.Tech (Bachelor of Technology) / BE (Bachelor of Engineering) 2021 January EE 7th Sem 71940 Network And Data Communication Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (EE) (2012 Onwards E-II) (Sem.?7)
NETWORK AND DATA COMMUNICATION
Subject Code : BTEE-804E
M.Code : 71940
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
A noiseless 4-kHz channel is sampled every 1 msec. What is the maximum data rate?
2.
How do guided media differ from unguided media?
3.
List two advantages and two disadvantages of having international standards.
4.
Differentiate between FDM and WDM. Which multiplexing technique use digital
signals?
5.
What is the function of a modem? Why is it called a modem?
6.
Difference between network ID and IP address.
7.
What is data encapsulation?
8.
Differentiate between Voice Network and Data Network.
9.
Write the concept of layer protocols and layer interfaces.
10. Give the difference between packet switching and message switching.
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SECTION-B
11. Briefly explain the coaxial cable, optical fiber, twisted pair and its applications.
12. Compare between datagram and virtual circuit subnet.
13. What is cyclic code and explain Cyclic Redundancy Check (CRC) code?
14. Write short notes on circuit switching, packet switching and message switching.
15. What are the different services that TCP provides to Applications program?
SECTION-C
16. What are the functions performed by each and every layer of OSI Model? Explain
briefly.
17. Discuss briefly the following polar encoding schemes :
a) NRZ
b) RZ
c) Manchester
d) Differential Manchester
18. Write short notes on any two :
a) X.21 communication standard
b) Code division multiple access
c) Wavelength-division multiplexing
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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