Thursday, August 19, 2021

Alagappa University B.Sc Computer Science 6th Sem COMPUTER NETWORK May 2021 Question Paper

Alagappa University Question Paper / Previous Year Exam Paper

Sub. Code : 13061/13261



B.Sc.(CS)/B.Sc.(CS) (Lateral Entry) DEGREE EXAMINATION 



Sixth Semester 

Computer Science 


(CBCS 2018 – 2019 Academic Year Onwards) 

Time : Three hours Maximum : 75 marks 

SECTION A — (10 x 2 = 20 marks) 

Answer ALL the questions. 

1. What are the three necessary criteria for an effective and efficient network? 

2. What are the advantages of distributed processing? 

3. What are the responsibilities of data link layer? 

4. What is redundancy? 

5. Define routers. 

6. How the packet cost referred in distance vector and link state routing? 

7. What is meant by congestion? 

8. List out the user related attributes. 

9. Define CGI. 

10. How is a secret key different from public key? 

SECTION B — (5 x 5 = 25 marks) 

Answer ALL questions, choosing either (a) or (b). 

11. (a) Explain in detail about transport layer and physical layer. 


 (b) Compare connection oriented and connectionless service. 

12. (a) Consider a 32 bit block of data 11100111 11011101 00111001 10101001 that has to be transmitted. If longitudinal redundancy check is used what is the transmitted bit stream? 


 (b) How does a token ring LAN operate? Discuss in detail. 

13. (a) Briefly describe about the packet switching. 


 (b) What are routers and discuss about routers in detail. 

14. (a) Compare the ISO OSI model and the TCP/IP reference model. 


 (b) Explain leaky bucket and token bucket algorithm. 

15. (a) Discuss about the RSA algorithm. 


 (b) Explain the type of encryption/decryption method. 

SECTION C — (3 × 10 = 30 marks) 

Answer any THREE questions. 

16. Explain the ISO-OSI model of computer network with a neat diagram. 

17. Discuss in brief about stop and wait protocol. 

18. Briefly discuss how DES algorithm works? 

19. Explain UDP and TCP with the neat diagram. 

20. Explain how security is provided in interact operations in detail. 


Share This
Previous Post
Next Post

B.E Civil Engineer Graduated from Government College of Engineering Tirunelveli in the year 2016. She has developed this website for the welfare of students community not only for students under Anna University Chennai, but for all universities located in India. That's why her website is named as . If you don't find any study materials that you are looking for, you may intimate her through contact page of this website to know her so that it will be useful for providing them as early as possible. You can also share your own study materials and it can be published in this website after verification and reviewing. Thank you!


Pen down your valuable important comments below

Search Everything Here