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Mscit 201

This document contains an exam for a Computer Networks and OS Essentials course. [Section A] contains 15 short answer questions covering topics like distributed systems, WANs, protocols, DNS, URLs, networking features of Windows XP, FDM, web browsers, ping utility, RPC, flow control vs congestion control, subnetting, and PPP. [Section B] contains 9 longer answer questions asking about OSI layers, data transmission rates over noisy channels, packet switching vs virtual circuit switching, MAC addresses and how they map to IP addresses, efficiencies of ALOHA and CSMA/CD, distance vector routing, LANs and CSMA variants, error control methods like exponential backoff and go back n

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82 views2 pages

Mscit 201

This document contains an exam for a Computer Networks and OS Essentials course. [Section A] contains 15 short answer questions covering topics like distributed systems, WANs, protocols, DNS, URLs, networking features of Windows XP, FDM, web browsers, ping utility, RPC, flow control vs congestion control, subnetting, and PPP. [Section B] contains 9 longer answer questions asking about OSI layers, data transmission rates over noisy channels, packet switching vs virtual circuit switching, MAC addresses and how they map to IP addresses, efficiencies of ALOHA and CSMA/CD, distance vector routing, LANs and CSMA variants, error control methods like exponential backoff and go back n

Uploaded by

api-3782519
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Roll No. ......................

Total No. of Questions : 13] [Total No. of Pages : 02

J-3660[S-1516] [2037]
M.Sc. (IT) (Semester - 2nd)
COMPUTER NETWORKS & OS ESSENTIALS (M.Sc. (IT) - 201/401)

Time : 03 Hours Maximum Marks : 75


Instruction to Candidates:
1) Section - A is compulsory.
2) Attempt any Nine questions from Section - B.

Section - A
Q1) (15 x 2 = 30)
a) What is a distributed system?
b) Define WAN?.
c) What is simplex transmission? Give examples.
d) What is a protocol?
e) Explain DNS.
f) What is URL?
g) Describe networking features of MS Windows XP.
h) Explain FDM.
i) What do you mean by a web browser?
j) What is ping utility?
k) Explain RPC.
1) Compare flow control and congestion control.
m) What is subnetting?
n) What is point-to-point protocol?
o) How router is different from gateway?

P.T.O.
Section - B
(9 x 5 = 45)
Q2) What is OSI standard? Describe the role of each layer in brief.

Q3) If a binary signal is sent over a 4 KHz channel whose signal-to-noise ratio
is 30dB, what is the maximum achievable data rate?

Q4) Distinguish between datagram packet switching and virtual circuit


switching.

Q5) What do you understand by MAC address? How is a MAC address


translated into an equivalent IP address?

Q6) Compare the efficiencies of ALOHA and CSMA/CD.

Q7) Explain distance vector routing algorithm in detail.

Q8) What is LAN? Define l-persistent and p-persistent CSMA.

Q9) Discuss the following.


(a) Exponential back off algorithm.
(b) Go back n ARQ.

Q10) Define switching. Differentiate between message switching and packet


switching.

Q11) What is the importance of E-commerce?

Q12) Suppose a data link has a probably ρ of successful transmitting a data


frame, so that it arrives undamaged. If a frame is damaged, in this network
the receiver sends back a request for retransmission. (For simplicity, assume
all these requests arrive back perfectly at the sender). What is the mean
number of transmissions required to successfully transmit a frame?

Q13) Write note on


(a) IP Telephony
(b) ICMP.
!!!!!

J-3660[S-1516] -2-

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