Computer Network : End Sem Examination ( 4th Sem )

  Computer Network

End Semester Examination, 2021-22
B. Tech - Semester : 04
Time : 03 hrs. - Max. Marks : 100

Instructions:

1. All questions are Compulsory
2. Assume missing data suitably, if any.

Section : A ( 10 x 4 = 40 Marks )

All questions are compulsory

1. What are the applications and uses of computer network?
2. Compare Star topology and Ring topology.
3. List any four function of data link layer.
4. The message 100110 is to be transmitted by taking the CRC polynomial x^3 + x^2 + 1 to protect it from errors. What must be message to be send after appending the CRC to the message?
5. A network on the internet has a subnet mask of 255.255.240.0. What is the maximum number of hosts it can handle?
6. What is Link State Routing Protocol? Give an example of Link State Routing Protocol.
7. What do you mean by Quality of service?
8. What is the need of transport layer?
   
9. How Process to Process delivery is different from node-to-node delivery?
10. Discuss the features of TCP.

Section : B ( 3 x 6 = 18 Marks )

All questions are compulsory

1. State the major difference between distance vector routing and link state routing.
   
   OR
   What are the advantages of adaptive / dynamic routing approach over non-adaptive / static routing approach?
2. How is connection-oriented service different from connectionless services?
   
   OR
   Briefly explain connection management in transport layer.
3. What is HTTP? Discuss the role of HTTP.
   
   OR
   Examine the differences between TCP and UDP protocols.

Section : C ( 3 x 10 = 30 Marks )

All questions are compulsory

1. Describe the format of IPv4 datagram with the help of a diagram, highlighting the significance of each field.
   
   OR
   Find the shortest route from node A to each of the other nodes in the given network using shortest path Dijkstra's Algorithm.
   
   
   
   
   
   
2. Compare and contrast the leaky bucket and token bucket congestion control strategies.
   

   OR

   What is Jitter Control? Explain the major cause and the mechanisms to reduce jitters.
3. How Congestion is controlled by transport layer? Explain.
   

   OR

   Explain working of SMTP protocol and its expansion. In addition, describe the Role of SMTP in Mail system.

Section : D ( 1 x 12 = 12 Marks )

All questions are compulsory

1. Write RSA algorithm? In RSA, given two prime numbers p=3 and q=11, find N and ∅. Choose e=7 and try to find d, such that e and d meet the criteria. also perform encryption for message, m=5.
   
   OR
   Differentiate between Symmetric versus Asymmetric cryptographic algorithms.

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