Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 6th Semester (Sixth Semester) 2014-2015 Computer Network Question Paper
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Gollo?m Paper 1]) ind Roll No. to be ?lled in your Answer Book)
PAPER ID : 110601
Roll N o.
B. Tech.
(SEM. VD THEORY EXAMINATION, 2014-15
COMPUTER NETWORK
Time : 3 Hours] [Total Marks : 100
? .
NOTE: ATTEMPT ALL QUESTIONS.
1 ATTEMPT ANY FOUR : (5x4=20)
(a)
(b)
(c)
(d)
(e)
(f)
110601]
Di??erentiate between Bit rate and baud rate. A modem
constellaiion diagram has data point at coordinates:
(1,1), (1,-1), (-1,1) and (-1,-1). How many bps can
a modem with these parameters achieve at 1200 baud?
State two reason for using layered protocols.
What are the number of cable links required for n
devicw connected in mash, ring, bus and star topology?
Calculate the required Bandwidth, if in a communication
channel the signal power is 10 W, and the information
transmission rate is 10kbps.
It is required to transmit a data at a rate of 64 kbps
over a 3 kHz telephone channel. What is the minimum
SNR required to accomplish this?
What do you mean by service primitives?
Discuss the services of each layer of 081 reference
model.
1 [ Contd...
(a)
(b?
(C)
(d)
(e)
(f)
(3)
110601]
ATTEMPT ANY F OUR :
ATTEMPT ANY TWO :
i
(5x4=20)
Given a 10-bit sequence 1010011110 and a divisor of
1011. Find the CRC. Check your answer.
Answer the following :
{i} A pure Aloha network transmits 200 bit frames
on shared channel of 200 kbps. What is the
through put if the system (all station together)
produces 250 frames per second?
(i) How can you compare pure Aloha and slotted
Aloha?
Discriminate between the send window and receive
window for link and how are they related with-
(i) 'A selective repeat retransmission scheme
(ii) A go-back-N control scheme
Discuss different carrier sense protocols. How are they
different than collision protocols?
Sketch the Manchester and differential Manchester
encoding for the bit stream: 0001110101
Discuss the di??erent physical layer tansmision media.
(10x2=20)
Write short notes on following:
(1) Stop and wait ARQ
(ii) Sliding Window Protocol
(iii) Go-Back N ARQ
(iv) Collision Avoidance
2 [ Contd...
(b)
(C)
4 i ATTEMPT ANY TWO:
(3)
(b)
110601]
Perform the subnetting of?the following IP address
160.11.X.X. Original subnet mask 255255.00 and
Number of subnet 6 (six)
Wh111 is the transmission time of a packet sent by a
station if the length of the packet is 2 million bytes and
the bandwidth of the ehatmel is 300 kbps?
(10x2=20)
Draw the diagram of TCP header and explain the use
of the following:
(1) Source and destination port addresses
(11) Sequence and acknowledgement numbem
(1ii) Code bits
(iv) Window size
(v) Urgent pointer
Descxibe the role of checksum ?eld and option pad
bytes.
Answer the folloWing:
(1) Differentiate between the block cipher with
transposition cipher.
(11) Using the RSA public key cryptosystem with a=1,
b=2 etc.
(I) pr= 7 and q=ll, list ?ve legal values for
d.
O
(1]) pr=13 and q-'-3l and d=7, ?nd e.
3 [Contain
(0) Discuss: ..
(i) Di??ei-ent steps of JPEG compreesion standard.
(ii) The RPC design and implementation issues.
5 ATTEMPT ANY TWO: . - (10x2=20)
(a) Explain the SMTP can handle iransfer of videos and
images? AISO explain the advantages of IMAP 4 over
POP 3 mail access protocols.
(b) What IS the difference between an active web docume?t,
and dynamic web page? Also explain the role of 061. ,
(c) (i) Compare and contrast TCP with RTP. Are both
doing the same things?
(i) What are the problems for full implementation of
voice over IP? Did you think we will stop using
the telephone network very soon?
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This post was last modified on 29 January 2020