UNIT - IV Ques.4 Ques.5

Size: px

Start display at page:

Download "UNIT - IV Ques.4 Ques.5"

Damon Warner
5 years ago
Views:

1 Immediately write your Roll No Bharati Vidyapeeth s Institute of Computer Applications and Management A-4, Paschim Vihar, New Delhi-63. Second Internal Examination Paper Code: MCA207 Subject: Data Communication & Networking Max. Marks: 45 Max. Time: 02 Hrs. Note: Ques.1 is compulsory, Attempt one question from each unit. Ques.1 a) Describe the count-to-infinity problem. (3) a) Differentiate between classful addressing and classless addressing. Give examples? (2) b) Token Bucket can solve the problem of congestion. Justify your answer (2) c) What are the two approaches to packet-switching? (2) d) What are the different transitions from IPv4 to IPv6? (2) e) What are the different types of Error reporting messages in ICMP? (2) f) What do you mean by TCP performance issues? (2) UNIT - III Ques.2 a) What are the different internetworking tools? (3) b) What are the main difference between a distance vector routing protocol and a link state routing protocol? For the network, shown in the figure given below, create distance vector table for all the nodes. (4) c) Difference between Open-Loop and Closed-Loop congestion control. (4) d) Explain IPv6 Extension Header. (4) Ques.3 a) What are the different types of ICMP messages? Explain all messages. (3) b) What are the different UNICAST routing algorithms and explain the difference between distance vector and link state routing algorithms. (4) c) What are the different techniques to improve Quality of Service? (4) d) Describe IPv4 packet and explain its various fields. (4) IQP.1

2 UNIT - IV Ques.4 a) Explain state transition diagram of TCP.. (5) b) What are the different compression techniques? Explain with the help of an example. (5) c) How symmetric-key cryptography different from asymmetric-key cryptography? (5) Ques.5 a) Difference between UDP and TCP protocol. (4) b) Write a short note on DNS. What are the Generic, Country and Inverse domains? (4) c) How works? (3) d) Write a short note on cryptography. (4) IQP.2

3 Immediately write your Roll No Bharati Vidyapeeth s Institute of Computer Applications and Management A-4, Paschim Vihar, New Delhi-63. First Internal Examination Paper Code: MCA207 Subject: Data Communication & Networking Max. Marks: 45 Max. Time: 02 Hrs. Note: Ques.1 is compulsory, Attempt one question from each unit. Ques.1 b) Draw a hybrid topology with a start backbone and four rings networks. (2) c) What is the difference between omni directional waves and unidirectional waves? (2) d) What is the difference between Signal Rate, Bit rate and Baud rate? Explain with diagram and examples? (3) e) What are headers and trailers, and how do they get added and removed? (2) f) Differentiate between periodic signals and Non periodic signals. (2) g) What are the responsibilities of the data link layer? (2) h) What are the different types of Propagation modes in Optical Fiber? (2) UNIT I Ques.2 e) What is the sampling rate needed for a signal with a bandwidth of 30,000Hz (6,000Hz to 36,000Hz)? (3) f) Explain Pulse Code Modulation (PCM)? (4) g) What are the different propagation modes? (4) h) What are the different techniques for Digital-to-Digital and Digital-to-Analog conversion? Explain merits and demerits. (4) Ques.3 a) Difference between guided and unguided media with the help of an example. (4) b) What does the Shannon capacity and Nyquist theorem have to do with communication? (3) c) Compare TCP/IP model with ISO/OSI Model of computer networks. (4) d) Give the NRZ-I, Manchester, Differential Manchester, and Bipolar encoding of the digital data: (4) UNIT II Ques.4 a) Compare and contrast Flow Control and Error Control. (4) b) Given a 10 bit sequence and a divisor is 1101, find the CRC. Also check your result. (3) c) With reference to Data Link Layer, discuss the frame format of HDLC. How is bit stuffing performed in HDLC? Briefly explain (4) IQP.3

4 d) Suppose that a selective-repeat ARQ is used where W=4. Show, by an example, that a 3 bit sequence number is needed. Discuss it s all the cases of Error Control. (4) Ques.5 a) Explain HDLC configuration and transfer modes. (4) b) Difference between CSMA, CSMA/CD and CSMA/CA. (4) c) Explain the architecture of Bluetooth. (4) d) What are the different types of Ethernet Standards? (3) IQP.4

5 Immediately write your Roll No Bharati Vidyapeeth s Institute of Computer Applications and Management A-4, Paschim Vihar, New Delhi-63. Third Internal Examination Paper Code: MCA207 Subject: Data Communication & Networking Max. Marks: 60 Max. Time: 03 Hrs. Note: Ques1. is compulsory, Attempt one question from each unit. Ques1. (2 x 10=20) a) Name the factors that affect the performance of a network. b) Name the factors that affect the security of a network. c) What are the key elements of a protocol? d) Which OSI layers are the user support layers? e) What are the responsibilities of the data link layer? f) Explain the difference between encoding and modulation. g) How is CRC superior to checksum? h) Why is flow control needed? i) Describe the three HDLC station type. j) What is the function of a router? UNIT - I Ques2. a) What is computer networking? Discuss the various types of it. (5) b) Give the names of various layers in OSI model. State the role of network layer in it. (5) Ques3. a) What do you mean by wireless transmission? Briefly describe the various media that support wireless transmission. (5) b) Distinguish between FSK, PSK and ASK? Discuss Pulse code modulation. (5) UNIT - II Ques4. a) With reference to Data Link Layer, discuss the frame format of HDLC. How is bit stuffing performed in HDLC? Briefly explain. (5) b) What is Sliding Window Protocol? What is the importance of windows size in this protocol? Compare its efficiency with Stop & Wait Protocol? (5) Ques5. a) What are the different configuration and transfer modes in HDLC. (5) b) Given a 10 bit sequence and a divisor is 1001, find the CRC. Also check your result. (5) IQP.5

6 UNIT - III Ques6. e) What are the different techniques to improve Quality of Service? (5) f) Describe IPv4 packet and explain its various fields. (5) Ques7. i) Difference between Open-Loop and Closed-Loop congestion control. (5) j) Explain IPv6 Extension Header. (5) UNIT - IV Ques8. e) Compare UDP and TCP. (5) f) Explain the different architecture of . (5) Ques9. a) What are the different compression techniques? (5) b) How symmetric-key cryptography is different from asymmetric-key cryptography? IQP.6

7 Immediately write your Roll No Bharati Vidyapeeth s Institute of Computer Applications and Management A-4, Paschim Vihar, New Delhi-63. Second Internal Examination Paper Code: MCA207 Subject: Data Communication & Networking Max. Marks: 45 Max. Time: 02 Hrs. Note: All Questions are Compulsory. Internal choice indicated. Ques1. i) Compare a PICONET and a SCATTERNET. (2) j) Discuss the use of Access Point in BSS and ESS. (2) k) What is the purpose of NAV? (2) l) What is zero window advertisement? (2) m) Difference between access protocol and channelizing protocol? (3) n) What are the different types of Ethernet standards? (2) o) Token Bucket can solve the problem of congestion. Justify your answer (2) Ques2. g) Explain Ipv4. What are the different fields in the protocols? Explain its use for Network Layer. (5) h) What are the different techniques to improve Quality of Service? (5) i) What are the different types of ICMP messages? Explain all messages. (5) a) What are the main difference between a distance vector routing protocol and a link state routing protocol? For the network, shown in the figure given below, create distance vector table for all the nodes. (5) k) Difference between Open-Loop and Closed-Loop congestion control. (5) l) Explain IPv6 Extension Header. What are the various techniques for transition from IPv4 to IPv6? (5) IQP.7

8 Ques3. g) What advantages does TCP have cover UDP? What are the features, which make TCP a reliable protocol? (5) a) Describe the following terms that are used in the Domain Name System. (i) Top-level domain (ii) CNAME (canonical name) (iii) Resolver (6) b) Explain the different architecture of . (4) d) Explain state transition diagram of TCP.. (5) e) What are the different compression techniques? Explain with the help of an example. (5) f) How symmetric-key cryptography different from asymmetric-key cryptography? (5) IQP.8

9 Immediately write your Roll No Bharati Vidyapeeth s Institute of Computer Applications and Management A-4, Paschim Vihar, New Delhi-63. First Internal Examination Paper Code: MCA207 Subject: DCN Max. Marks: 45 Max. Time: 02 Hrs. Note: All Questions are Compulsory. Internal choice indicated. Ques1. a) Assume five devices are arranges in a mesh topology. How many cables are needed? How many ports are needed for each device? (2) b) Double errors can easily be trapped in the CRC method. Explain. (2) c) What is the difference between Signal Rate, Bit rate and Baud rate? Explain with diagram and examples? (3) d) What are headers and trailers, and how do they get added and removed? (2) e) What are the basic difference between HUB, Switch and Router? Where we can use these devices? (2) f) Compare Checksum and CRC. (2) g) Differentiate between periodic signals and Non periodic signals. (2) Ques2. a) How does Signal to Noise ratio affect channel capacity? Explain with the help of Shannon capacity formula. (4) b) What are the different factors to measure the performance of a network? (3) c) What are the responsibilities of Data Link Layer? How can it achieved? (4) d) Which type of orbit does a GEO satellite have? What is the relation between the Van Allen Belts and Satellites? (4) a) Find out the capacity of a telephone line that transmits frequencies from 300Hz with a signal to noise ratio of 35dB. (3) b) Compare NRZ-I, Manchester and Differential Manchester with the help of an example. Discuss merits and demerits of these techniques. (4) c) What are the different Error Control Protocols in Data link Layer? (4) d) What are the different types of propagation in wireless media? Difference between parabolic dish antenna and the horn antenna. (4) Ques3. a) What are the Different types of Propagation modes in Optical Fiber? Discuss the advantages and disadvantages. (4) b) Suppose that a selective-repeat ARQ is used where W=4. Show, by an example, that a 3 bit sequence number is needed. Discuss it s all the cases of Error Control. (4) c) What are the different modulation-demodulation techniques for converting Digital to Analog and Analog to digital? (4) IQP.9

10 d) With reference to Data Link Layer, discuss the frame format of HDLC. How is bit stuffing performed in HDLC? Briefly explain (3) a) In Go-Back-N, the sequence numbers should be one more than the size of buffer. Why? (4) b) Compare TCP/IP model with ISO/OSI Model of computer networks. (4) c) What are the different configuration and transfer modes in HDLC. (4) d) Given a 10 bit sequence and a divisor is 1101, find the CRC. Also check your result. (3) IQP.10

11 Immediately write your Roll No Bharati Vidyapeeth s Institute of Computer Applications and Management A-4, Paschim Vihar, New Delhi-63. Third Internal Examination Paper Code: MCA207 Subject: Data Communication & Networking Max. Marks: 60 Max. Time: 03 Hrs. Note: Ques1. is compulsory. Attempt one question from each unit Ques1. (10*2=20) a) What are the two types of line configuration? b) Explain the layers of Internet model which are the network support layers. c) Distinguish between data rate and signal rate. d) Difference between fixed size framing and variable size framing. e) What do you mean by BSS and ESS in wireless LAN? f) What do you mean by NAT? g) What do you mean by static documents, dynamic documents and active documents? h) How scheduling improves QoS i) What do you mean by direct delivery and indirect delivery? j) Why Congestion occurs in the network? UNIT - I Ques2. (10*1=10) a) An analog signal has a bandwidth of 40 KHz. If we sample this signal and send it through a 50Kbps channel. What is the SNR? (3) b) Which of the four digital-to-analog conversion techniques (ASK, FSK, PSK or QAM) is the most susceptible to noise? Defend your answer. (3) c) Explain Mobile Telephone System. (4) e) Difference between guided and unguided media with the help of an example. (3) f) Explain Pulse Code Modulation. (4) g) What does the Shannon capacity and Nyquist theorem have to do with communication? (3) UNIT - II Ques3. (10*1=10) a) What are the different controlled access methods? (3) b) What are the different interconnecting devices? (4) c) Write a short note on Error Control. (4) e) Explain HDLC configuration and transfer modes. (3) f) Difference between CSMA, CSMA/CD and CSMA/CA. (4) g) Explain the architecture of Bluetooth. (4) UNIT III IQP.11

12 Ques.4 (10*1=10) a) Write a short note on ICMP. What are the various error-reporting and query messages in ICMP? (4) b) Difference between Distance Vector routing and Link State routing algorithms.(3) c) What are the different internetworking tools? (3) a) Difference between Leaky Bucket and Token bucket algorithms. (3) b) Difference between IPv4 and IPv6. (4) c) What are the different UNICAST routing protocols? Explain path vector routing. (3) Ques.5 (10*1=10) UNIT - IV e) Difference between UDP and TCP protocol. (4) f) Write a short note on DNS. What are the Generic, Country and Inverse domains? (3) g) How works? (3) a) What the different traditional ciphers? (3) b) How Huffman coding works? Explain with the help of an example. (4) c) Write a short note on cryptography. (4) IQP.12

13 Immediately write your Roll No Bharati Vidyapeeth s Institute of Computer Applications and Management A-4, Paschim Vihar, New Delhi-63. Second Internal Examination Paper Code: MCA207 Subject: Data Communication & Networking Max. Marks: 45 Max. Time: 02 Hrs. Note: All Questions are Compulsory. Internal choice indicated. Ques1. p) What are the common Gigabit Ethernet implementations? (2) q) How is the preamble field different from the SFD field? (2) r) What is the purpose of NAV? (2) s) What are the two approaches to packet-switching? (2) t) What are the different transitions from IPv4 to IPv6? (3) u) What are the different types of Error reporting messages in ICMP? (2) v) What do you mean by TCP performance issues? (2) Ques2. j) Compare and contrast a random access protocol with a channelizing protocol. (3) k) Compare a PICONET and a SCATTERNET. (4) l) What are the different techniques to improve Quality of Service? (4) m) Describe IPv4 packet and explain its various fields. (4) m) Compare and Contrast a random access protocol with a controlled access protocol. (3) n) What are the different UNICAST routing algorithms and explain the difference between distance vector and link state routing algorithms. (4) o) Difference between Open-Loop and Closed-Loop congestion control. (4) p) Explain IPv6 Extension Header. (4) Ques3. h) UDP is a message-oriented protocol. TCP is a byte-oriented protocol. If an application needs to protect the boundaries of its message, which protocol should be used TCP or TCP? Explain its header. (4) i) What is an advantage of a hierarchical name space over a flat name space for a system the size of the Internet? (4) j) Explain the different architecture of . (3) k) How does streaming live audio/video differ from streaming stored audio/video? (4) IQP.13

14 g) How does recursive resolution differ from iterative resolution?. (4) h) How is HTTP similar to SMTP? (3) i) What are the different compression techniques? (4) j) How symmetric-key cryptography is different from asymmetric-key cryptography? IQP.14

15 Immediately write your Roll No Bharati Vidyapeeth s Institute of Computer Applications and Management A-4, Paschim Vihar, New Delhi-63. First Internal Examination Paper Code: MCA207 Subject: Data Communication & Networking Max. Marks: 45 Max. Time: 02 Hrs. Note: All Questions are Compulsory. Internal choice indicated. Ques1. w) Draw a hybrid topology with a start backbone and four rings networks. (2) x) What is the difference between network layer delivery and transport layer delivery? (2) y) What are the different types of addresses? (2) z) Define piggybacking and its usefulness. (3) aa) Difference between Bandwidth and Throughput. (2) bb) What is the difference between omni directional waves and unidirectional waves? (2) cc) What is the purpose of cladding in optical fiber? (2) Ques2. n) What are the header and trailers, and how do they get added and removed. (3) o) Compare TCP/IP model with ISO/OSI Model of computer networks. (4) p) Give the NRZ-I, Manchester, Differential Manchester, and Bipolar encoding of the digital data: (4) q) How is the simple parity check related to the two-dimensional parity check? Explain with the help of an example. (4) q) What is the sampling rate needed for a signal with a bandwidth of 30,000Hz (6,000Hz to 36,000Hz)? (3) r) Explain Pulse Code Modulation (PCM)? (4) s) What are the different transmission modes? (4) t) What are the different techniques for Analog-to-Analog and Digital-to-Analog conversion? (4) Ques3. l) What are the different protocols in Noiseless Channels and Noisy Channels? (4) m) Compare and contrast Flow Control and Error Control. (4) n) Given a 10 bit sequence and a divisor is 1101, find the CRC. Also check your result. (3) o) What are the different methods of Error Control? (4) IQP.15

16 k) Generate a Hamming Coded Message for the Data frame How this Hamming Code will help in Error Detection & Correction? Briefly explain. (4) l) Explain the reason for moving from the Stop-and-Wait ARQ protocol to the Go-Back-N ARQ Protocol. (3) m) With reference to Data Link Layer, discuss the frame format of HDLC. How is bit stuffing performed in HDLC? Briefly explain (4) n) What are the responsibilities of data link layer? (4) IQP.16

DCN Questions CHAPTER 1:- NETWORKING FUNDAMENTALS

DCN Questions CHAPTER 1:- NETWORKING FUNDAMENTALS Q1. What are the four fundamental Characteristics of Data Communication? On which effectiveness of data communication is depended? Q2. Define data communication?