Computer Networks - CS Paper 1

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COMPUTER NETWORKS (CS - 303)
Time: 03 Hours
Instruction to Candidates:
1) Section - A is compulsory.
2) Attempt any Four questions from Section - B
3) Attempt any Two questions from Section - C.
Maximum Marks: 60
Section - A

Q1)
a)Explain the basic concepts of a analog digital signals?
b)What are the major types of Networks? And explain. Explain difference between the LAN and WAN?
c)Explain about X.21 modem;
d)Explain about Digital data transmission?
e)What is WDM?
f)Explain about Error correction.
g)What is protocol
h)What is checksum?
i)Explain about the DSL?

Section - B

Q2) Explain OSI reference model in detail.
Q3) Discuss different switching schemes and compare them.
Q4) Explain the sliding window protocol with Algorithm used?
Q5) Explain anyone mechanism used for error correction?
Q6) Explain guided and unguided media.

Section - C

Q7) What is the difference between the packet switching and message switching?
Q8) What are error detecting codes? Give examples.
Q9) Explain different types of spread spectrums.