M.Sc.(Computer Science) (Semester- II)
Examination, 2017 (CBCS)
COMPUTER COMMUNICATION NETWORK
Day Date: Friday, 21-04-2017 Marks: 70
Time: 10.30 AM to 1.00 PM
Instruction Question no. 1 and 2 are compulsory.
Attempt any 3 questions from Q. no. 3 to Q. no. 7
Figures to the right indicate full marks.
Q.1 Choose correct alternatives. 10
An unauthorized user is a network
Performance Reliability
Security all the above
This was the first network.
CSNET NSNET ANSNET ARPANET
Which sublayer of the data link layer performs data link
functions that depend upon the medium?
Logical link control sublayer
Media access control sublayer
Network interface control sublayer
None of the mentioned
Which one of the following is a data link protocol?
Ethernet point to point protocol
HDLC all of the mentioned
The 4 byte IP address consists of
Network address Host address
Both and None of the mentioned
In virtual circuit network each packet contains
Full source and destination address
a short VC number
both and
none of the mentioned
Page 1 of 3
User datagram protocol is called connectionless because
All UDP packets are treated independently by transport
layer
It sends data as a stream of related packets
Both and
None of the mentioned
Transmission control protocol is
Connection control protocol
Uses a three way handshake to establish a connection
Receive data from application as a single stream
All of the mentioned
Application developer has permission to decide the following
on transport layer side.
Transport layer protocol Maximum buffer size
Both of the mentioned None of the mentioned
10) Application layer offers service
End to end Process to process
Both of the mentioned None of the mentioned
Fill in the blanks. 04
A is a data communication system within a building,
plant, or campus, or between nearby buildings.
The technique of temporarily delaying outgoing
acknowledgements so that they can be hooked onto the next
outgoing data frame is called
The lowest IP address
Subnet of 194.24.0.8/22
Q.2 Solve following. 08
A router has just received the following new IP address:
57.6.96.0/21, 57.6.104.0/21, 57.6.112.0./21 and
57.6.120.0/21. If all of them use the same outgoing line, can
they be aggregate? If so, to what? If not, why not?
A computer on a 6 Mbps network is regulated by token
bucket. The token bucket is filled at a rate of 1 Mbps. It is
initially filled to capacity with 8 megabits. How long can the
computer transmit at the full 6 Mbps?
Write short note on: 06
Admission Control
Piggybacking
Q.3 What is framing? Explain any two methods with a suitable
example.
07
What is routing? Explain distance vector routing with a suitable
example.
07
Page 2 of 3
Q.4 Describe in brief network addressing with a example. 07
What is computer network? Its application. 07
Q.5 Briefly explain OSI reference model. 07
Write a note on performance enhancement in application layer. 07
Q.6 Write note on SMTP, AGP, ARP and ICMP. 07
What is a conjunction? Explain any two methods with example. 07
Q.7 Explain ARPANET in details. 07
What are the elements of transport layer? Explain briefly any
two transport element.