Computer Communication and Network Msc IT University Of Sargodha (UOS) 2019
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Paper text
le
University of Sargodha
Subiest Informagon Technolors Papers Computers
M.Sc. 248 Term Examiestion 2012
Time Allow
Note: bjective part is compulsory, At
29681
Muximum Marks 11
Q.1.
xi.
*xii.
iii.
XIV.
YEV.
IVi.
AR K
@bjective Part
(Compulsory)
Write short answers of the following in 2-3 lines each on your answer sheet.
4. What is compression? Where it is implemented in TCP/IP model?
(16*2)
%. What is reflection?
il. What is the difference between second and third generation cellular wireless networks?
iv. In which layer, MAC address is used?*‹
wi.
Give the working principle of switch.
Why we use serial transmission?
vii.
ViL.
Give the formula to calculate a bit rate for noisy and noiseless channels.
What are the different types of digital to analog conversion? brial, ELD, Bipolor
What are the differences between amplitude shift keying and frequency shift keying
What is the difference between half-duplex and full-duplex transinisston madas?
What is GSM?/
Must data siron
Distinguish berween baseband transmission and broadband transmission.
Define a DC component and its effect on digital transmission.
What are two types of line configuration?
What is sky propagation?
What is Ethernet? Where it is used? Connel Comp in LAN
Discreds Amplitude lend. & FSK To Frozueny
assign bil values subie
Levals
Subjective Part
Q.2.
Q.3.
Q.4.
a) Describe the perwork and transport layer in detail.
b) List torge different techniques in serial transmission and explain the differences.
Die entiate berween cirezit and packet switchigen
Q.5.
Q.6.
Q.T.
MHz. Calculate the number of levals, the baud rate and the bandwidth.
Explain the various LAN topologies.
a) Explain line coding. Give different line coding schemes.
b) Assume a system uses five protocol layers. If the application program creates a message of
100 bytes and each layer (including the fifth and the first) adds a header of 10 bytes to the data
unit, what is the efficiency (the ratio of application layer bytes to the number of bytes transmitted)
of the system?
How do guided media differ from unguided media?
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