Hall Ticket No Question Paper Code: AIT003
INSTITUTE OF AERONAUTICAL ENGINEERING
(Autonomous)
B.Tech IV Semester End Examinations (Regular) May, 2018
Regulation: IARE R16
COMPUTER NETWORKS
Time: 3 Hours (Common to CSE IT) Max Marks: 70
Answer ONE Question from each Unit
All Questions Carry Equal Marks
All parts of the question must be answered in one place only
UNIT I
1. Describe the structure how the message will be encapsulated in the OSI layered approach with
example.
What is transmission media Distinguish guided and unguided transmission media in detail with
an example.
2. Consider a point-to-point link 50 km in length. At what bandwidth would propagation delay (at
a speed of 2×108 equal transmit delay for 100-byte packets? What about 512-byte packets?

Discuss the importance of circuit switching with an example.
UNIT II
3. Propose a mechanism that connect N switches supporting K VLAN groups, so that min switching
and max connectivity could be achieved. Justify.
Calculate the UDP checksum for
i. 010111000110010111011010 01100101.
ii. 11100110011001101101010101010101.
In what case checksum fails to detect error? Explain by taking one above example.
4. Discuss the various Data Link Control(DLC) services with a neat sketch.
Draw User Datagram Protocol header format. The following is a dump of a UDP header in
hexadecimal format.
0632000DOO lCE217
i. What is the source port number?
ii. What is the destination port number?
iii. What is the total length of the user datagram?
iv. What is the length of the data?
v. Is the packet directed from a client to a server or vice versa?
vi. What is the client process?
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UNIT III
5. Discuss the design issues of network layer. Explain the IP packet format with a neat sketch.

An organization is granted the block 130.34.12.64/26. The organization needs four subnetworks,
each with an equal number of hosts. Design the subnetworks and find the address allocation
information about each network.
6. Describe the working of Open Shortest Path First(OSPF) protocol with an example.
What is Border Gateway Protocol(BGP)? Explain the functioning of BGP with neat sketch.

UNIT IV
7. Consider the three way handshake in TCP connection setup.
i. Suppose that an old SYN segment from station arrives at station requesting a TCP
connection. Explain how the three way handshake procedure ensures that the connection is
rejected.
ii. Now suppose that an old SYN segment from station arrives at station followed a bit later
by an old ACK segment from A to a SYN segment from B. Is this connection request also
rejected?
Describe the mechanism of TCP connection management. Illustrate with a sequence of message
with an example.
8. What is congestion? Describe the different iterations, when the congestion has taken place of n
number of senders with finite buffers. Mention its impact on the throughput and delay.
What is multiplexing and de-multiplexing and why it is required? Discuss the working with
respect to connection oriented and connectionless with an example.
UNIT V
9. Discuss the block diagram of FIFO client-server model. Demonstrate how client and server
communicate using UDP.
Describe the importance of SNMP in network management standard.
10. Describe the structure of HTTP. Identify the components used in cookies with an example.

Discuss with an example how the naming convention is resolved in DNS.