B.Tech
(U.P.T.U.)
EIGHT
SEMESTER EXAMINATION, 2011-2012
Data
Communication Networks
Q.1
Attempt any four parts of the following: (5*4=20
Marks)
Q.1(a)
Discuss design issues for the layered architecture of data
communication.
Q.1(b)
Classify service primitives. Define protocol. Discuss the service
primitive, used for connection oriented services.
Q.1(c)
Compare EIA RS-232C and ETA RS-449.
Q.1(d)
Discuss the specification of Ethernet.
Q.1(e)
What is Multiplexing? Compare TDM and FDM.
Q.1(f)
Discuss the salient feature of hybrid switching with relevant
example.
Q.2
Attempt any four parts of the following: (5*4=20 Marks)
Q.2
(a) Discuss the salient feature of character oriented and bit
oriented protocols .
Q.2(b)
What is the importance of data link layer? Discuss the services it is
providing to network layer.
Q.2(c)
What are the IEEE standards develop for the local area Networking?
Explain
their working.
Q.2(d)
Explain the working of stop and wait ARQ and GO-Back-N ARQ.
Q.2(e)
For p=110011 and M=11100011,Find CRC.
Q.2(f)
Differentiate between pure and slotted ALOHA. Show frame transmission
and vulnerable time for slotted ALOHA and prove that the maximum
utilization of slotted ALOHA occurs at G=1 with value 36.8%.
Q.3
Attempt any two parts of the following: (10*2=20
Marks)
Q.3
(a) Discuss the Design issue of Network layer with example. Explain
Bellman-ford routing algorithm.
Q.3
(b)Differentiate between open loop and close loop congestion control.
How traffic policing differs from traffic shapping? Explain leaky
bucket algorithm.
Q.3
(c) Discuss the role Bridges, Router, Gateways in internet
connection.List the message types associated with Internet Control
Message Protocol(ICMP) .
Q.3
(d) Explain the functions of all the channels in united states
digital cellular (USDC) system.
Q.4
Attempt any two parts of the following: (10*2=20 Marks)
Q.4
(a)Discuss the design issue of transport layer.Explain the term
connection management.
Q.4
(b)Explain TCP transmission policy and congestion control.
Q.4
(c)Discuss the performance issues of computer network.
Q.5
Attempt any four parts of the following: (5*4=20 Marks)
Q.5
(a) TCP/IP protocol suite.
Q.5
(b) Addressing mechanism of TCP/IP.
Q.5
(c) DNS.
Q.5
(d) FTP.
Q.5
(d) SMTP
Q.5
(d) Relevance of w.w.w.
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