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Computer Networks and Security Question Paper - Dec 18 - Electronics And Telecomm (Semester 7) - Pune University (PU)
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Computer Networks and Security - Dec 18
Electronics And Telecomm (Semester 7)
Total marks: 70
Total time: 2.30 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
1.a.
Draw TCP/IP protocol suite. List with example addresses present at every layer.
(6 marks)
00
1.b.
Explain the Gigabit Ethernet networks.
(4 marks)
00
OR
2.a.
Explain medium access control in IEEE 802.11.
(6 marks)
00
2.b.
List the various protocols giving their significance at network layer.
(4 marks)
00
3.a.
Explain remote and mobile host communication in mobile IP.
(6 marks)
00
3.b.
Briefly define subnetting. How do the subnet mask differ from a default
mask in classful addressing?
(4 marks)
00
OR
4.a.
What is dynamic routing? Discuss distance vector routing.
(6 marks)
00
4.b.
List and explain different types of addresses used in IPv6.
(4 marks)
00
5.a.
What are the main objectives of transport layer? Explain with neat diagram process to process delivery in transport layer.
(9 marks)
00
5.b.
Explain connection establishment and connection termination to the transport layer.
(9 marks)
00
OR
6.a.
Draw the TCP header, Explain the unction of each field.
(9 marks)
00
6.b.
State and explain the important features of SCTP.
(8 marks)
00
7.a.
Explain Telnet and FTP in detail with respect to server and client communication.
(9 marks)
00
7.b.
What is the importance of the DNS? Explain the components of the DNS system.
(8 marks)
00
OR
8.a.
How does electronic mail system work? What is the role of SMTP and
POP-3 server in E-mail system?
(9 marks)
00
8.b.
Explain how a web page is accessed through internet by a browser.
(8 marks)
00
9.a.
What is cryptography? Explain in brief substitution cipher and transposition cipher.
(8 marks)
00
9.b.
Explain the RSA algorithm with suitable example.
(8 marks)
00
OR
10.a.
Explain the various security features offered by PGP.
(8 marks)
00
10.b.
Explain the utility and security aspects in digital signature.
(8 marks)
00
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