Computer network previous year paper

B.C.A. (Fifth Semester) Examination, 2022
Third Paper/(Computer Networks)
Time: 1:30 hours / Maximum Marks : 75
Note: Attempt any five questions. All questions carry equal marks. The answer to given questions should not exceed 250 words each.

1. Write a short description of the different types of Transmission modes, with their advantages/disadvantages. 15
2. Give a comparative account of the following in brief, with the help of a clear diagram:
OS Reference Model and TCP/IP model. 15
3. Diferentiate Detween: (5+5+5)
((i)Guided and Unquided media
(ii) Packet Switching and Message switching
(iii) Bridge and Gateway
4.How is error detection and correctior carried out? Discuss with examples. 15
5. Write a brief note on ISDN and its advantages, applications. 15
6. Explain with diagram, the working of: 15
(ii) Router
7. What are the functions of the Transport Layer? Explain briefly and also name a few
applications based on this layer 8. Write a short note on the function of 15
(a) Sessions layer
(b) Applications layer
9.What are the different types of multiplexing? Explain each with its advantages?


B.C.A. (Fifth Semester) Examination, 2020
Third Paper / (Computer Networks)
Maximum Marks : 75 time : 3 hrs

1.(a) What do you understand by distributed processing? Explain. 5+5+5
(b) What is the implication of Topology’ in a network? Draw the different types of Topologies and list their advantages and disadvantages. (c) What is a MODEM? Explain its function.
2.Differentiate between the following: 5+5+5
(a)Guided and unguided media.
(b) Propagation speed and time.
(C) Distortion and Noise in signal Transmisson.
3. (a) What do you understand by multiplexing? Explain its types with their relative
advantages and disadvantages 8+7
(b) Differentiate between circuit switching and packet switching with example.
4. Differentiate between the following: 5+5+5
(a) Svnchronous and Asvnchronous protocols.
(b) LCP and NCP.
(c)Repeaters and Bridges.
5.Define and explain the following. 3×5=15
(a) Message switching.
(b) Shannon capacity
(c)Error detecting codes (d) Bit oriented protocols.
(e) Internet working!
6. (a) What do you understand by a Routing Algorithm? What are its functions? 5+5+5
(b) List the different types of routing algorithm and explain any one of them.
(c)What is congestion? How is congestion control achieved?
7. List the functions of the Transport layer. What are its elements? Explaih the UDP,DCCP and
TCP in relation to the transport layer. What is port number? 15
8. Explain the following with examples:5+5+5
a) Dialog control in the sessions aver.
(b) Authentication and Authorization.
(c) Sessions management.
9. (a) What are the protocols that govern the functioning of the Application layer? How
do Telnet and FIr work? (b) Is HTTP an application layer technology?What is its role in initiating the functioning of a Web Application?.

YEAR – 2019

(Computer Networks)
Maximum Marks : 75 Time: Three Hours

1.(a) Discuss the transmission möde and categories of network. 7.5×2
(b) Explain the concept of distributed processing. Illustrate with an example.
2.(a) Explain DTE-DCE Interface with suitable example? 7.5×2
(b) Define Layers and discuss the function of OSI and TCP models.
3. (a) Explain the concept of transmission media. Illustrate through an example 7.5×2
(b) illustrate propagation speed and time.
4. (a) Explain Shannon capacity with examples (b) Explain noise and throughput with an example
5. (a) What is Telephony? Write the function of Telephony. 7+8
(b) Define error detection and correction with an example.
6. Briefly define the following terms in reference to Computer Network (any two). 7.5×2
(a) PPP layers
(b) ISDN
(c)Transmission state
(d) LInK access procedure
7. (a) Write the function of repeater and Routers. 7.5×2
(b) Explain Congestion control algorithms.
8. (a) Write a brief notes on: Network layers in the internet. 7.5×2
(b) Explain internetworking and its working procedure.
9. (a) Discuss the function of session layer. 7.5×2
(b) What is connection management? Discuss its functioning methodology.
10. Write detailed notes on: Presentation layer and Application layer

YEAR – 2018

B.C.A. (Fifth Semester) Examination, 2018
Third Paper (Computer Networks)
Time : Three Hours Maximum Marks – 75

  1. Explain the functions of 7-layers of OSI model. 15
  2. Write the similarities and differences between packet and circuit switching. 15
  3. Write down the following 15
    (a) Compare virtual circuit subnet and data gram subnet.
    (b) Explain leaky bucket algorithm with its performance.
    (c) List the characteristics of broadband coaxial cable.
  4. Explain the different modes of transmission with suitable example. 15
  5. Explain the differences between the following : 15
    (a) WDM & TDM
    (b) Static routing & Dynamic routing
    (c) ISDN & B-ISDN
  6. Describe the following : 15
    (i) DNS
    (ii) Quality of Service (QOS)
    (iii) Ethernet
  7. Describe the characteristics and applications of the following network devices : 15
    (a) Repeaters
    (b) Routers
    (c) Bridge
    (d) Switches
    (e) Gateway
  8. What is congestion control? Explain one technique for controlling the congestion in a network. 15
  9. Discuss the functions of transport, sey.ion, presentation and application layer;.
  10. Explain sliding window protocol for flow con-trol at data link layer with suitable example.

YEAR – 2017

B.C.A. Examination, 2017
Fifth Semester /Third Paper
(Computer Networks)

  1. (a) What is the difference between Analog and Digital data communication? 7
    (b) Explain the utility of the following:
    1. Modem
    2. A/D Converter
    3. D/A Converter
    4. ISDN
  2. What is the source of different type of errors that may crop up during data transmission? Explain the
    meaning of “error detecting codes” and “error correcting codes”. 15
  3. What is the difference between connectionless and connection oriented services? Why are both
    required in TCP/IP? 15
  4. How is IP addressing carried out? Explain SNMP and E-Mail system. 15
  5. (a) Draw the layer diagram of TCP/IP protocol suite and explain it. 8
    (b) Discuss various LAN topologies with diagram. 7
  6. (a) What is the function of the Network layer? 7
    (b) Briefly explain and distinguish between circuit switching, packet switching and message
    switching. 8
  7. (a) How is router based Networking done? 8
    (b) What are ports? Why do we need them? List some of the well known parts. 7
  8. What are the protocols that are followed in the Data Link Layer? Explain with examples. 15
  9. Write short notes on : 5+5+5
    (a) Simplex and Half Duplex Channels
    (b) Applications of the Sessions layer
    (c) Congestion Control
  10. (a) What is Well-known addressing in Transport protocols? 7
    (b) Explain the function of CCR (Commitment), Concurrency and recovery) service element in OSI application layer 8