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Posted Date: 13 Nov 2009 Posted By: rakesh Member Level: Gold
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2009 Acharya Nagarjuna University B.Tech Electronics & Communications Engineering Model Paper -Computer networks Question paper
IV/IV B.Tech Degree Examination
November 2009
Computer networks
EC 416
PART - A is compulsory
In PART - B each question should be written from all the units. Total Marks : 70
PART - A 14 Marks
1 a)What is network protocol?
b)define network topology.
c)what is a modem?
d)which layer is responsible for logical addressing?
e)what is error control?
f)what is flow control?
g)define ethernet?
h) define susnet.
i)what is IP address?
j) define congestion control.
k)which of the protocol in Transport layer is connectionless?
l) what are the applications of internet?
m)acronym for SNMP.
n) what is POP?
PART - B
unit 1
2 a)Discuss briefly the functions of the different layers of the OSI
reference model, with a neat diagram.(10M)
b)what are the various typer of networks?(4)
or
c)Compare and contrast OSI and TCP reference models (10M)
d)why must modems be used in pairs? How does a modem combine the
concepts of a communication?
unit 2
3 a)what is sliding window protocol?What assumptions are made in
sliding window protocols? Give the algorithm for 1-bit sliding window
protocol. (10M)
b) differentiate between
i)Go-back N
ii) selective Repeat (4M)
or
c)explain 802.5 token ring standard. Give the frame format for 802.5
frame. !10M)
d) what is a bridge?Differentiate source routing bridge and
transparent bridge (4M)
unit 3
4 a) explain the various design issues of network layer. (7M)
b)give notes on:
i) ARP
ii)RARP (7M)
or
c) what is meant by congestion? state the general principles of
congestion control. (7M)
d)write notes on IP addressing classes (7M)
unit 4
5 a) enumerate the primitives of the transport service. How they are
used in transport layer? (7M)
b) draw and explain tcp header (7M)
or
c) write notes on:
i)www
ii)dns
iii)snmp
iv)services of email (14M)
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