QIS COLLEGE OF ENGINEERING AND TECHNOLOGY: ONGOLE

(AUTONOMOUS)
Data Communication and Networking

Question Bank
UNIT –I
1. What are the different characteristics of Analog signals. CO-1 BTL-2
2. Write down the differences between Analog and digital signals. CO-1 BTL-2
3. Explain about composite signals CO-1 BTL-2
4. Calculate the theoretical highest bit rate of a regular telephone line. A telephone line
normally has a bandwidth of 3000. The signal to noise ratio is usually 3162 . find the
channel capacity. CO-1 BTL-4
5. Explain about digital and analog signals. CO-1 BTL-2
6. Define bitlength, bitrate, baud rate with some examples. CO-1 BTL-2
7. Expain baseband and broad band transmission. CO-1 BTL-2
8. a) Define nyquist rate and Shannon capcity. CO-1 BTL-2
9. b) Consider an extremely noisy channel in which the value of the signal to noise ratio
is almost zero. Find the channel capacity C. CO-1 BTL-3

UNIT-II
1. Explain and design of encoding: Binary Stream, Manchester, NRZ, NRZ-I
CO-2 BTL -2
2. Difference between NRZ, NRZ-I. CO-2 BTL-4
3. Explain about Digital to Digital conversion Technique. CO-2 BTL-2
4. Explain about Digital to Analog conversion Technique. CO-2 BTL-2
5. Explain about Analog to Digital conversion Technique. CO-2 BTL-2
6. Explain about Analog to Analog conversion Technique. CO-2 BTL-2
7. Explain about Guided media and unguided media CO-2 BTL-2
8. Represent 10101101 using all line coding techniques. CO-2 BTL-3

UNIT-III
1.a) List the reasons for using layered protocols in network design. CO-3 BTL-4
b) Explain OSI reference model with neat diagram . CO-3 BTL-2
2.a) Explain the ISO-OSI models with a neat diagram. CO-3 BTL-2
b) Explain about the different types of transmission medias, CO-3 BTL-2
3.List and explain the various network topologies using suitable diagrams.
CO-3 BTL-4
4.What is TCP/IP model? Explain the functions and protocols and services of each layer?
Compare it with OSI model. CO-3 BTL-1
 5.a) Demonstrate the function performed by each layer. CO-3 BTL-2
b) Discuss about different topologies. CO-3 BTL-2
6.a) What are the advantages and disadvantages of Bus topology. CO-3 BTL-1
b) Compare OSI Reference model with the TCP/IP Model. CO-3 BTL-2
7. Explain LAN,WAN,MAN CO-3 BTL-2
8. Explain in detail about simplex, halfdulplex, fullduplex. CO-3 BTL-2

UNIT-IV
1. Distinguish circuit switching and packet switching. CO-4 BTL-4
2. a) Compare and contrast a circuit switched network and a packet switched network.
CO-4 BTL-5

b) Briefly explain the different types of packet swithing techniques with suitable
networks. Write each of its advantages and disadvantages. CO-4 BTL-2
3.a) Explain guided media differ from unguided media. Explain the three types of guided
media and two types of unguided media. CO-4 BTL-2
b) Explain the circuit switched networks, data gram networks and cable networks with
suitable diagrams. CO-4 BTL-2
4. Explain FDM in detail. CO-4 BTL-2
5. Describe in detail about Time division multiplexing CO-4 BTL-2
6. Comparison of various multiplexing FDM,WDM,TDM CO-4 BTL-5
7. a) Design of structure of a switching CO-4 BTL-6
b) Compare datagram and virtual circuit approach CO-4 BTL-5
8. Design Time division multiplexing with suitable example CO-4 BTL-6

UNIT-V

1. Explain sliding window protocol with Go-back-N CO-5 BTL-2

2. Explain the flow and error control mechanism in data link control. CO-5 BTL-2
3. Explain 802.11 Frame links in detail. CO-5 BTL-2
4. Explain MAC sub layer protocol and frame structure of IEEE 802.11.
CO-5 BTL-2
5. Explain Hamming code method in error correction with suitable example.
CO-5 BTL-2
6. What are the steps involved in link state routing? Explain the contents and
requirements of link state packets. CO-5 BTL-1
7. Explain in detail about broadcast routing and link state routing with examples.
 CO-5 BTL-2
8. Explain shortest path routing algorithm with suitable example CO-5 BTL-2

UNIT-VI

1. a) Compare and contrast the two TCP/IP transport protocols: TCP and UDP in terms of
reliability and flow control. Explain with the help of a diagram, how connection is
established in TCP. CO-6 BTL-2
2. a) Explain in detail about the process to process delivery using UDP and its uses.
CO-6 BTL-2
b) Discuss about transfer agent HTTP.

3. Explain in detail about congestion control techniques in transport layer with a suitable
example. CO-6 BTL-2
4. Explain about HTTP in detail. CO-6 BTL-2
5. Discuss about relation between transport and network layers CO-6 BTL-2
6.What is the purpose of sequence number in TCP packet. CO-6 BTL-2
7. Explain the respoosibilites of transport layer CO-6 BTL-2
8. Explain the duties of transport layer. CO-6 BTL-2