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Tuesday, 25 August 2020

IGNOU BCA BCS-041 term-end exam notes,upcoming guess papers,important questions free download

IGNOU BCA/MCA all semester new revised (1st semester,2nd semester,3rd semester,4th semester,5th semester and 6th semester) term-end exam notes,study materials,important questions,books/blocks,previous years paper,upcoming guess paper (June-December) free download.
IGNOU BCA BCS-041 term-end exam notes,upcoming guess papers,important questions free download


IGNOU BCA BCS-041 Term-End Examination (FUNDAMENTALS OF COMPUTER
NETWORKS) books/block,term-end exam notes,upcoming guess paper,important questions,study materials,previous year papers download.

                                                                     Notes-1




1. (a) Differentiate between single mode and multi mode optical fiber.
(b) What is count-to-infinity problem in distance vector routing protocol ? How does it happen ? Explain with an example.
(c) Define angle modulation. What are its types ? Discuss the limitations of angle modulation.
(d) Calculate the CRC for bit sequence 1101011011 and generator polynomial is 10011.
Note : Show all steps and calculation.
(e) What is Ad hoc Wireless Communication System ? Explain.

2. (a) Write the steps for Message Digest 5 (MD5) algorithm.
(b) Explain the importance of Sliding Window Protocol. Also, list the types of sliding window techniques.

3. (a) What is NIC ? Write the techniques used by NIC for data transfer.
(b) What are the advantages and disadvantages of bridges ?
(c) Find the class of following IPv4 addresses :
(i) 193.14.56.22
(ii) 226.11.14.27
(iii) 134.11.27.13
(iv) 252.5.15.111

4. (a) What is ICMP ? Discuss the ICMP message categories. Also, give at least two examples of each ICMP message category.
(b) Differentiate between pure ALOHA and slotted ALOHA. Give formulas for their throughput.

5. Write short notes on the following :
(a) CSMA/CD
(b) Layer 2 Switch
(c) Frame Relay
(d) OSI Model

                                                         Notes-2



1. (a) Why is serial data transmission faster than parallel data transmission ? Explain.
(b) What is better for computer communication-analog or digital ? Justify your answer.
(c) Why are 'Hash functions' called 'one-way functions' ? Explain.
(d) Differentiate between SVC and PVC of X.25.
(e) Write the steps of Distance Vector Routing Algorithm. Give an example to show its working.
(f) What is Windowing ? How is flow control and reliability achieved through windowing at transport layer ?

2.(a) Write a difference between pure ALOHA and slotted ALOHA. If the throughput of pure ALOHA is S = Ge-2G, show that the maximum throughput (S ma.) is 0-184.
(b) Explain the working of 3-way handshake used in TCP, using a suitable diagram.

3. (a) Calculate CRC, if the message is x 7 + x5 +1 and the generator polynomial is x3 + 1.
(b) Explain the working of ARP using a diagram. How is it different from RARP ? Explain.

4. (a) Explain RSA algorithm with example.
(b) What is the difference between classful addressing and classless addressing ? How does classless addressing result in decrease in the table size ?

5. Write short notes on the following :
(a) Frame Relay
(b) Fiber Optics Cables
(c) IMAP and POP
(d) OSI Model

                                                                  Notes-3



1. (a) What is count to infinity problem in distance vector routing protocol ? How does it happen ? Explain with an example.
(b) Explain the advantages of Frame Relay over X•25 network.
(c) How are switches and hubs different ? List at least four differences.
(d) What is the role of parallel and serial transmission devices in computer networking ? Explain.
(e) Differentiate between frequency shift keying and phase shift keying.
(f) What is subnetting ? What is the subnetwork address, if the destination address is 200.45.34.56 and the subnet mask is 255.255.240.0 ?
(g) Compare and contrast between private key and public key cryptography.

2. (a) Explain the concept of Go-Back-N sliding window protocol with a suitable example.
(b) Calculate CRC, if the message is 110101001 and the generator is 1011.

3. (a) Assume two primary numbers p = 7 and q = 19, use RSA algorithm to show the encryption and decryption with a message "6".
(b) Explain the functions of various connecting devices in a LAN.

4. (a) What is fragmentation ? Explain why IPv4 and IPv6 protocol need to fragment some packets.
(b) How is connection established and terminated in TCP using three-way handshaking mechanism ? Explain.

5. Write short notes on the following :
(a) ALOHA Protocols
(b) SNMP
(c) MD5
(d) Wireless Generations (1G, 2G and 3G)

IGNOU BCA BCS-041 Term-End Examination (FUNDAMENTALS OF COMPUTER
NETWORKS) term-end exam notes Download

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