Help?
PLEASE MATCH YOUR ASSIGNMENT QUESTIONS ACCORDING TO YOUR SESSION
IGNOU BCS-41 (July 2026 – January 2026) Assignment Questions
Question 1:
a) Explain the basic working principle of optical fiber communication. How does light propagation differ in various types of optical fibers?
b) Describe the TCP/IP reference model. Explain the responsibilities of each layer and mention at least two commonly used protocols associated with every layer.
Question 2:
a) What is meant by routing instability in computer networks? Explain how incorrect routing information can spread among routers with the help of an example.
b) Define modulation in data communication. Explain angle-based modulation techniques and discuss any two challenges associated with their use.
Question 3:
a) A data stream 10101101 is to be transmitted using CRC. The generator polynomial is x³ + x + 1. Calculate the CRC bits and write the final transmitted frame. Show all intermediate steps.
b) Explain the concept of a self-organizing wireless network. Why are such networks useful in situations where fixed infrastructure is unavailable?
Question 4:
a) What role does ICMP play in IP-based networks? Classify ICMP messages and explain their importance with suitable examples.
b) Define a Network Interface Card (NIC). Explain how modern NICs handle data transmission efficiently between memory and the network medium.
Question 5:
a) Explain the purpose of cryptographic hash functions. Describe the main stages involved in generating a message digest using a standard hashing algorithm.
b) Differentiate between a hub and a switch. Also explain how switching decisions differ between Layer-2 switches and Layer-3 switches.
Question 6:
a) Compare POP3 and IMAP4 in terms of message storage, synchronization, and client support. Which protocol is more suitable for multi-device access and why?
b) In a public key cryptosystem, two prime numbers are selected as p = 7 and q = 11. Calculate the public key and private key using the RSA approach.
Question 7:
a) Compare contention-based access methods with controlled access methods in local area networks. Highlight their advantages and limitations.
b) Explain the round-robin scheduling technique used in data transmission. How does it differ from polling-based access control?
Question 8:
a) Describe the working principle of distance-based routing algorithms. What are the major drawbacks of such routing methods in large networks?
b) Define Quality of Service (QoS) in networking. Explain any three techniques used by networks to ensure better QoS for real-time applications.
IGNOU BCS-41 (July 2024 – January 2025) Assignment Questions
Q1. (a) Differentiate between parallel and serial communication. Give an example of each.
(b) Compare POP and IMAP.
Q2. (a) What is Ad hoc Wireless Communication System? Explain.
(b) What is better for computer communication — analog or digital? Justify your answer.
Q3. What is Windowing? How is flow control and reliability achieved through windowing at transport layer?
Q4. (a) Compare between CSMA/CD and Ethernet protocol. How does CSMA/CD resolve the problem of line connection? Explain.
(b) Differentiate between circuit switching and virtual circuit. Also explain the effect of router failure in virtual circuits.
Q5. Given data frame is 1101011011 and generator polynomial G(x) = x4+ x + 1. Derive the transmitted frame using CRC method. Write all the steps involved in the process
Q6. Differentiate between public key cryptography and private-key cryptography. Assume two prime numbers p and q are 13 and 17 respectively. Calculate private key and public key using RSA algorithm.
Q7. (a) Differentiate between pure ALOHA and slotted ALOHA. Give formulas for their throughput.
(b) Explain the importance of Sliding Window Protocol. Also, list the types of sliding window techniques.
Q8. (a) Write the step-by-step working of Link State Routing. Also, compare it with Distance Vector Routing.
(b) Explain leaky bucket algorithm for congestion control. Also list its advantages and disadvantages.
