Download AKTU B-Tech 8th Sem 2015-16 EEC 809 Data Communication Networks Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 8th Semester (Eight Semester) 2015-16 EEC 809 Data Communication Networks Question Paper

Printed Pages: 4 EEC-809
(Following Paper ID and Roll No. to be ?lled In your
Answer Books)
RollNolllllll I
B.TECH
Theory Examination (Semester-VIII) 2015-16
DATA COMMUNICATION NETWORKS
Time : 3 Hours Max. Marks : 100
Section-A
1. Attempt all parts. All parts carry equal marks. Write
answer of each part in sort. (2XI0 = 20)
(a) Group the OSI layer by function.
(b) Distinguish between connectionless and connection
oriented services.
(c) How does guided media differ from unguided media?
(d) What is the importance of cryptography?
(e) Enlist the difference between message switching and
packet switching.
(l) P.T.0.
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(f)
(B)
(h)
(i)
G)
What do you understand by multicast and broadcast
operational mode of a communication channel?
State the relationship between data rate and bandwidth.
Which services are provided by transport layer to upper
layer?
Explain the salient fetures of DHCP.
Compare TCP/IP and 081 model data communication
networks.
Section-B
Attempt any ?ve questions from this section.
(a)
(b)
(C)
(10x5 = 50)
Descn'be the functions of different layers of 081 model
with neat diagram.
What is CSMA/CD? Consider building a CSMA/CD
network running leps over a 1 Km cable with no
repeaters. The signal speed in the cable is 200000
km/second. What is the minimum frame size?
Describe ALOHA protocol? What do you understand
by pure ALOHA and slotted ALOHA?
(2)
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(d)
(e)
(f)
(g)
(h)
Explain intemet control message protocol (ICMP).
List the message types associated with the protocol.
What do you mean by ?ow control? Describe stop and
wait ?ow control technique.
Explain and compare the performance of different line
code.
Enlist the services provided by application layer. What
do you understand by HTTP?
What is congestion control? Suppose that the TCP
congestion window is set to 18 kb and a time out occurs.
How big will the window be if the next four transmission
bursts are all successful? Assume that the maximum
segment size in lkb.
Section-C
Note :Attempt any two questions in this section. (15X2 = 30)
3. (a) Draw the TCP/IP network architectlual model and ex-
plain the features of various laye13.Also list the important
protocols at each layer and describe its purpose.
(b) Describe header format of TCP protocol.
(3) P.T.O.
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4. (a) De?ne the term ?IP address?, ?MAC address?and
?hardware/physical address?. Also explain the terms
?addless pair?and ?ARP cache?.
(b) Write a short note on Bluetooth.
5. (3) Describe with the help of suitable diagram the Go-
back?N continuous RQ error control scheme.
(b) Describe the main ?elds in an Ethernet ?'ame header.
(4)
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